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Патент USA US2723522

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Nov. 15, 1955
Filed NOV. 15, 1952
J. H. GIBSON ET AL
MACHINES FOR RE PAIRING THE VALVE SEAT
FACES 0F PARALLEL SLIDE VALVES
2,723,512
5 Sheets-Sheet 1
.. 1"
‘
Inventors
”
QJOLM H‘ 61M
-
H- ILI‘MAILA.
Attorney:
Nov. 15, 1955
J_ H_ GIBSON ETAL
MACHINES FOR REPAIRING THE VALVE SEAT
FACES 0F PARALLEL SLIDE VALVES
Filed Nov. 15. 1952
2,723,512
5 Sheets-Sheet 2
1
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nventons
JOLK
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H. H. HwqI-L
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Attorneys
NQV- 15, 1955
Filed Nov. 15, 1952
.1. H. GIBSON ETAL
2,723,512
MACHINES FOR REPAIRING THE VALVE SEAT
FACES OF PARALLEL sum: VALVES
5 Sheets-Sheet 3
F763.
92
4
_
Inventors
Attorneys
Nov. 15, 1955
J. H. GIBSON ETAL
2,723,512
MACHINES FOR REPAIRING THE VALVE SEAT
FACES OF PARALLEL SLIDE VALVES
Filed Nov. 15. 1952
5 Sheets-Sheet 4
4
F/G.4.
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INVENTOPS
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Nov. 15, 1955
J. H. GIBSON ETAL
MACHINES FOR REPAIRING THE VALVE SEAT
FACES OF PARALLEL SLIDE VALVES
Filed Nov. 15, 1952
2,723,512
5 Sheets-Sheet 5
I
I
‘
Inventors
JAM H- euiuk
7? ‘
0L H: Haul».
QM,
Attorneys
Unied Stars PM‘: 10
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_
2,723,512
Patented Nov. 15, 1955
2
the relative position of the valve body when the machine
is applied in the intended way with respect thereto being
shown in dotted lines indicating a section of the valve
2,723,512
MACHINES FOR REPAIRING THE VALVE. SEAT
FACES 0F PARALLEL SLIDE VALVES
John H. Gibson and Richard H. Hunter‘, London‘, Eng
land, assignors to Dewrance & Company Limited, Lon
don, England, a British company
'
Application November 15,"1952,'Serial No. 320,732
body;
UK
Figure 2 is an outside elevation of the machine as
viewed from the left hand side of Figure 1, the relative
position of the valve body being again shown in dotted
lines indicating a section of the valve body;
Figures 3 and 4 are views of the machine to a larger
10 scale, in section on the lines III--III and IV—IV re
Claims priority, application Great Britain
November 23,‘ 1951
spectively of Figure 2, the valve body being shown in
section in these ?gures in full lines;
11 Claims. (01. 51-241)
Figure 5 is an elevation from the same aspect as Fig
ure‘ 2, but showing only selected parts of the machine,
This invention relates to ‘machines for repairing the 15 and to a larger scale, in order to illustrate the corre
,
‘
spondence between two eccentric motions;
Patent speci?cation No.’,2,5‘72,485 describes a ma
Figure 6 is an enlarged representation of part of Fig
valve seat faces of parallel slide valves.
chine for repairing a valve seat face of a parallel slide
valve, comprising gyratory means for applying a‘ tooling
ure 3.
Referring to the drawings, the machine includes a
action to the valve seat face, a rotatable member, a ?rst 20 grinding head 1 adapted to ?t between the valve seat faces
bearing through which the gyratory means is rotatably
mounted on the rotatable member, an abutment mem
ber adapted to engage the valve body internally thereof,
a second bearing which has an axis of rotation parallel
2 and 3 of the parallel slide valve 4 to be repaired. The
grinding head comprises a grindstone 5 at one end there
of for operating on the valve seat face 2 to be repaired,
and at the other end includes an abutment member 6 of
with and eccentric to that of the ?rst bearing and through 25 generally circular form adapted to engage the valve seat
face 3 opposite that to be repaired.
abutment member, locating means for locating the abut
' Referring to Figure 3, and particularly to Figure 6,
which the rotatable member is rotatably mounted on the
ment member within the valve body relative to the valve
the abutment member 6 is formed with a central bore
seat face to be repaired, means for varying the relative
7 within which ?ts an axle 8 welded to the abutment.
positioning of the abutment member and gyratory means 30 member and projecting therefrom towards the plane of
in the direction of the axis of rotation of the gyratory
the valve seat face 2 to be repaired, with its axis parallel,
means, driving means for rotating the gyratory means,
when the abutment member 6 engages the valve seat
and driving means for rotating the rotatable member.
face 3, to the axis of the valve passage 9. A recess 10
It is described therein how such a machine can be used
in' the abutment member is formed with an internal thread
for operating upon a valve seat face after inserting the 35 in engagement with a complementary external thread on
assembly of abutment member, rotatable member, and
a rotatable annular feed part 11 adapted for rotation about
gyratory means within the valve body. As ‘illustrated the
the axis of the axle 8. The rotatable annular feed part
driving means for rotating the gyratory means comprise
11 has secured thereto a sprocket wheel 12, coaxial with
a belt operated by a pulley outside the valve body ?xedly
its axis of rotation, by which it may be rotated through
mounted on a base plate secured to thevalve body at an 40 the medium of the chain 13. On the axle 8 is rotatably
opening therein. The belt is tensioned by jockey pulleys
mounted a rotatable member 14 (shown in Figure 6),
in contact with the belt and on respective biassed arms.
which carries a bushing 15 for making contact with the
In the application of the machine to the grinding of
axle, and which is formed with a prolongation 16 extend
a valve seat face, it may be desired‘to rotate the gyra
ing in a direction away from the grindstone 5 within the
tory means at a speed of two to three thousand revolu
45 rotatable annular feed part 11. The rotatable annular
tions per minute.
‘
feed part 11 is formed with a recess 17 within which,
It is found that the planetory‘movement given to the ‘
between the inner wall of the recess 17 and the prolonga
gyratory means may bring about undesirable variations in
tion 16 of the rotatable member 14 is housed a ball
belt tensioning.
thrust bearing 18. The rotatable member 14 and the
It is very desirable to avoid checks in the drive of the
50 rotatable annular feed part '11 are maintained in proper
gyratory means while its axis of rotation is moved around,
mutual relationship by a sleeve 19 screwed into the pro
while remaining parallel to, an axis ?xed in a ?rmly
longation 16 of the rotatable member 14 and having a
supported abutment member.
peripheral ?ange 20 lying within a second recess in the
An object of the present invention is to provide im
rotatable annular feed part 11. Two diametrically 0p
proved means for transmitting the ‘drive to the gyratory
posed
apertures in the ?ange 20 provide means for get
55
means.
ting a purchase on the sleeve 19 when it is desired to in
Another object is to provide for the improved mount
sert or remove it.
ing of the gyratory means. ‘
To the rotatable member 14 is secured a ‘sprocket wheel
Another object is to provide for the improved sup
'25‘ coaxial with the axle 8 and engaged by a chain'26
porting and locating of the abutment member.
60 by which the rotatable member 14 can be rotated around
Features of novelty characterising our invention are
the axle. Upon the rotatable member 14 is mounted
pointed out in the claims annexed to and forming part
a tool holder 27 arranged for rotation about an axis
of the present speci?cation. The above and further ob
parallel with and eccentric to the axis of the axle 8.
jects and advantages of the invention will be apparent
The tool holder 27' comprises a ?rst part‘ 28 formed
from the accompanying drawings and from the subse
65 with a cylindrical surface with which a ?atbelt 29 makes
quent description relative thereto in which we have il
a driving connection and, screwed into the ?rst part on
lustrated and described a preferred embodiment of our
the side thereof remote from the abutment member 6,
a second part 30 carrying the grindstone 5, the grind
stone being maintained in position by a retaining plate
The invention will now be described,‘ by way of ex
ample, with reference to'the accompanying drawings in 70 31_ having a ‘threaded part 32 ‘screwed into the second
invention.
which:
'
.
.
‘
_
Figure 1 is an outside side elevation of the machine,
part 30 of the tool holder. The tool holder 27 is mounted
on the rotatable member by a ball bearing 33 housed
2,723,512
in a recess 34 in the ?rst part 28 of the tool holder
and in a recess in the rotatable member 14 so arranged
that movement of the said ?rst part 28 of the tool holder
with respect to the rotatable member 14 in the direc
tion away from the abutment member 6 is prohibited
while movement in the reverse direction (assuming that
the second part 30 of the tool holder has ?rst been
unscrewed from said ?rst part 28) releases the bearing
33, and by a ball thrust bearing 35 housed in a recess
4
to engage the ends of the bushing 86. To the end of
the bearing member 87 remote from the removable plate
90 there is secured a sprocket wheel 91 having the same
number of teeth as the sprocket wheel 25 secured to
the rotatable member 14 of the grinding head 1, and
the chain 26 engages both sprocket wheels. Extending
from the removable plate 90 concentrically with the bush
ing 86 is a spindle 92 of an operating handle 93 for
turning the bearing member 87.
36 in the ‘second part 30 of the tool holder and in a
The bearing member 87 is formed with a bore 94
recess in the rotatable member. Separation of the two
parts 28 and 30 of the tool holder gives access to the
of which the axis is parallel with and eccentric to that
bearings 33 and 35.
Referring to Figures 1, 2 and 3, the grinding head 1
of the bearing member 87. The bore houses widely
spaced ball bearings 95 for supporting the spindle 100
of a driving pulley 101 with which is associated a ?ex
is positioned with respect to the valve seat face 3 'oppo~ 15 ible drive 102 (schematically shown in dotted lines) for
effecting connection with an electric driving motor 103
site that to be repaired by a movable support 50 in
cluding a forked end portion 51 connected by pivot pins
(schematically shown in dotted lines). The driving pul
ley 101 is arranged for driving the belt 29 engaging the
52 to the abutment member 6 on opposite sides thereof;
cylindrical part of the tool holder 27.
the arms of fork 51 are pivotally mounted upon a pin
Removal of the plate 90 gives access to the parts
53 traversing the head of an adjusting rod 54, the shank 20
arranged inside the bore 94 in the bearing member.
of which is bored and tapped and engaged by a com
The eccentricity of the spindle 100 of the driving
pulley 101 with respect to the bearing member 87 is
the same as the eccentricity of the tool holder 27 with
25 respect to the rotatable member 14. Moreover the chain
base plate 61.
26 is initially arranged on the sprocket wheels 91 and
Biassing means 62 are provided for exerting a force
25 with the axis of the driving spindle 100 in the same
on the movable support 50 to urge the abutment member
relative position to the axis of the bearing member 87
6 against the valve seat face 3 opposite that to be repaired.
as the axis of the tool holder 27 relative to the axis
The biassing action is effected in the neighborhood of
the abutment member 6 by a toggle comprising a link 30 of the rotatable member 14. Thus the apparatus may
be set up with the axis of the spindle 100 in the position
63 hinged at one end to a pin 64 extending through the
A shown in Figure 5 with respect to the axis B of the
arms of the forked end portion 51 of the movable sup
bearing member 87, and the axis of the tool holder 27
port 50 and at the other end to the head 65 of toggle
in the position C with respect to the axis D of the ro
operating means 66, and comprising also a link 67 con
tatable member 14. Seeing that the sprocket wheels
nected at one end to said head 65 and at the other
91 and 25 have the same numbers of teeth, should the
end pivoted to a pin 68 in a forked end 69 of an arm
bearing member 87 be turned by the handle 93 so that
70 pivotally connected to a support 81 projecting from
plementary bolt 55 passing through an appropriate bore
in a base plate 61. The shank of the adjusting rod 54 is
arranged for sliding within a sleeve 60 welded to the
the axis of the drive shaft 100 attains a new position,
and welded to the base plate 61. The forked end 69
for example A’, then the axis of the tool holder 27
of the arm is adapted for making contact with the in
40 will attain a corresponding position C’ such that the
ternal surface of the valve body.
driving belt 29 around the driving pulley 101 and the
The toggle operating means 66 includes a threaded
tool holder 27 maintains the same tension. The driving
push rod 71 to one end of which the head 65 is welded
pulley 101 and the tool holder 27 are shown in the ?rst
and having its other end threaded and extending through
case in full, in the second case in dotted lines.
an aperture 72 in the base plate 61; the push rod 71
The bracket 85 is also formed with a bore through
is located with respect to the base plate 61 by a sleeve 45
which extends a spindle 104 on which is mounted a
73 whose end 74 remote from the head 65 is formed
as a nut permitting it to be turned by means of a spanner;
sprocket wheel 105 which is engaged by the chain 13
which engages the sprocket wheel 12 secured to the
the sleeve 73 extends through the aperture 72 and is
rotatable annular feed part 11 of the grinding head 1;
externally threaded at the end opposite to the end 74
for engagement with a swivel nut 75. The sleeve 72, 50 the spindle 104 may be turned by hand through a four
armed star wheel 106 at the other end thereof from
the swivel nut 75 mounted thereon and the aperture 72
in the base plate are so formed that a certain tolerance
is allowed in the angle at which the push rod 71 ex
the sprocket wheel.
The base plate 61 is adapted to be secured by bolts
200 onto the valve body 4 in a position spanning an
The effective length of the movable support 50 is ad 55 opening 107 opposite the aperture 108 in the valve body
through which (when the valve is assembled for opera
justable by means other than the bolt 55; thus the pin
tion) the valve spindle passes. The base plate is formed
53 through the head of the adjusting means 54 can be
with suitable openings for the passage of the chains 13
placed in any of three pairs of bores 80 (shown in Fig
and 26 and the driving belt 29.
ures l and 2) in the members of the forked end por
To the side of the abutment member 6 remote from
tion 51 of the movable support 50. The length of the
the base plate 61 there is secured with the intermediary
arm 70 is also adjustable; the forked end 69 is arranged
of a bracket 109 a spindle 110 extending therefrom in
for movement telescopically with respect to the remainder
a direction away from the base plate and, which is adapted
of the arm 70 and is secured thereto by a pin 82 which
to extend through and beyond the aperture 108. The
passes through a bore 83 in the arm and can pass through
any of three pairs of opposite apertures 84 in the tele 65 spindle 110 is of smaller diameter than the aperture 103
in the valve body. A plate 111 having a central aper
scopic part.
ture can be threaded over the spindle and secured by
On the side of the base plate 61 remote from the grind
T-bolts 112 to a ?ange 113 on the valve body, which
ing head is mounted a bracket 85 carrying a bushing
?ange has over-size slots which are spanned by the heads
86 within which is mounted for rotation about an axis
of the T-bolts and a nut 114 can be threaded on the
parallel to the axle 8 of the grinding head 1 a hear
spindle 110 and tightened to engage the plate 111.
ing member 87 of substantial length. The bearing mem
For operating‘ the machine to grind a valve seat face
ber 87 is located axially by a peripheral ?ange 88 ad.
of a parallel slide valve for which it may be adapted,
jacent an end of the bearing member 87 and a similar
the machine is arranged with chains 13 and 26 and the
?ange 89, on a removable plate 90 secured to the other
end of the bearing member 87, the ?anges being adapted in belt- 29 of requisite length to suit the size of valve,
tends through the base plate 61.
2,723,512
,
the pin 53 is inserted through the appropriate bores 80,
and the pin 32 is inserted through the appropriate bores
84.
6
5
The star wheel 106 is rotated if necessary to re
duce the distance between the grindstone 5 and the abut
ment member 6.
The cover is removed from the open
ing 107 in the part of the valve body 4 opposite the
aperture 108 for the passage of the valve spindle and
the movable parts of the valve including the valve spindle
The machine can be used for lapping a valve seat face
by removing the grindstone 5 from the tool holder 27
and replacing it by an appropriate lapping plate, and by
disconnecting the ?exible drive 102 from the driving pul~
ley 101 and mounting in its place on the driving shaft a
further handle so that the driving pulley may be turned
manually at any desired low speed appropriate for a lap
ping operation.
1
are removed. The machine is then applied to the valve
Should the valve be in the position upside down with
body so that the spindle 110 enters the aperture 108 10 respect to the position shown, i. e. with the aperture 108
and the grinding head 1 enters the space between the
at the top, when the machine is to be applied thereto,
valve seat faces 2 and 3, with the grindstone 5 adjacent
the nut 114 instead of the bolt 55 can be used for the
the valve seat face 2 to be repaired. The base plate
operation of manoeuvring the grinding head into the de
61 is secured to the valve body 4 at the opening 107.
sired position relative to the axis of the valve passage 9.
The bolt 55 is turned if necessary to manoeuvre the 15
We claim:
abutment member 6 to the appropriate position opposite
1. A machine for repairing a valve seat face of a par
the valve seat face 3 when the axle 8 is coaxial with
allel slide valve, comprising gyratory means for applying
the valve passage 9. The head 74 of the sleeve 73 on
a tooling action to the valve seat face, a rotatable mem
the push rod 71 is then rotated in the direction to effect
ber, a ?rst bearing through which the gyratory means is
the bringing of the forked end 69 of the arm 70 into 20 rotatably mounted on the rotatable member, an abutment
contact with an internal surface of the valve body,
member adapted to engage the valve body internally
and then continued so that the toggle, using the valve
thereof, a second bearing which has an axis of rotation
body as an abutment, exerts a force on the movable
support 50 to press the abutment member 6 ?rmly against
parallel with and eccentric to that of the ?rst bearing and
through which the rotatable member is rotatably mount
the valve seat face 3 opposite that which is to be re 25 ed on the abutment member, a rotary driving member
paired. The plate 111, T-bolts 112 and nut 114 are
whose axis of rotation is spaced from the axis of rotation
then applied so that the spindle 110 is located with re
of the gyratory means, endless ?exible driving means cou
spect to the aperture 108. When the electric motor 103
pling the gyratory means with the rotary driving member
is started, the grindstone 5 is rotated at a high speed.
for drive of the gyratory means by the rotary driving
Rotation of the star wheel 106 in the appropriate direc 30 member, a rotatable bearing member, a third bearing
tion effects rotation of the rotatable annular feed part
through which the rotary driving member is mounted on
11 with respect to the abutment member 6 so that it
the rotatable bearing member, supporting means for the
advances with respect thereto in the direction of the
rotatable bearing member, a fourth bearing through which
valve seat face 2 to be repaired, carrying with it the
the rotatable member is rotatably mounted in the support
rotatable member 14, the tool holder 27 and the grind 35 ing means and which has an axis of rotation parallel
stone 5, so that the grindstone 5 may be brought into
with the third bearing and with the same degree of eccen—
contact with the valve seat face 2 to be repaired. Ro
tricity as regards the third bearingas that of the second
tation of the rotatable member 14 by manual operation
bearing as regards the ?rst bearing, means coupling the
of the handle 93 produces a planetary movement of the
grindstone 5 in relation to the valve seat face 2, with the 40 rotatable member with the rotatable bearing member for
result that the grindstone 5 effectively operates upon
the whole of the face 2. The star wheel 106 is op
erated until the valve seat face 2 has been ground to
the requisite extent.
'
drive of the rotatable member in synchronism with the
rotatable bearing member, driving means arranged for
rotating the rotary driving member and driving means ar
ranged for rotating the rotatable bearing member.
2. A machine for repairing a valve seat face of a par
During the grinding operation, the abutment member 45
allel slide valve, comprising gyratory means for applying
6 is pressed against the valve seat face 3 with a force
a tooling action to the valve seat face, a rotatable mem
independent of and desirably many hundreds of times
ber, a ?rst bearing through which the gyratory means is
larger than the actual force between the grindstone 5
rotatably mounted on the rotatable member, an abutment
and the valve seat face 2. The proper seating of the
abutment member 6 upon the valve seat face 3 is facili 50 member adapted to engage the valve body internally
thereof, a second hearing which has an axis of rotation
tated by the fact that it is able to rock relatively to the
parallel with and eccentric to that of the ?rst bearing and
support 50. Thus the grinding head is ?rmly located.
The spindle 110 and the movable support 50 assist in
through which the rotatable member is rotatably mounted
on the abutment member, of the rotatable and abutment
maintaining the grinding head against lateral movements.
one member including co-operating internally
The bolt 55 prevents movement of the grinding head in 55 members
and externally threaded feed parts adapted upon the rota
the direction away from the base plate, while the nut 114
tion of one feed part relative to the other to effect move
prevents movement in the direction towards the base plate.
ment of the gyratory means longitudinally of its axis of
The provision of the axle 8 of the grinding head 1, secured
rotation, a movable support hingedly connected to the
to the abutment member 6, makes for ?rm supporting
of the rotatable member 14, more especially since it has 60 abutment member at opposite portions of the abutment
member, biasing means adapted in operation by bearing on
a relatively long contact therewith through the bush 15,
and the two bearings 33 and 35 make for maintenance of
the relative position of the tool holder 27 on the rotatable
member 14. Thus vibration of the grindstone 5 is sub
the movable support to urge the abutment member
against the valve seat face opposite that to be repaired,
driving means arranged for rotating the gyratory means,
stantially avoided in spite of the high rate of revolution 65 driving means arranged for rotating the rotatable mem
at which it is operated. Since the axis of the driving shaft
ber, and means arranged for producing relative rotation
100 has always a position relative to the axis of the bear
of the feed parts.
> ,
ing member 87 in which it is eccentrically mounted which
3. A machine for repairing a valve seat face of a
is the same as the position of the axis of the tool holder
parallelvslide valve, comprising gyratory means for ap
27 relative to the axis of rotation of the rotatable mem~ 70 plying a tooling action to the valve seat face, a rotatable
ber 14 in the grinding head 1, the driving belt 29 has no
tendency as the handle 93 is turned to become too slack
or too tight, and thus slowing or stoppage by slipping or
inordinate tensioning forces cannot interfere with the
grinding operation.
‘
member, a ?rst bearing through which the gyratory means
is rotatably mounted on the rotatable member, an abut
ment member adapted to engage the valve body in
ternally thereof, a second bearing which has an axis of
75 rotation parallel with and eccentric to that of the ?rst
2,723,512
7
8
bearing and through which the rotatable member is ro
parallel slide valve, comprising gyratory means for apply
tatably mounted on the abutment member, of the ro
tatable and abutment members one member including
ing a tooling action to the valve seat face, a rotatable
eo-operating internally and externally threaded feed
is rotatably mounted on the rotatable member, an abut
ment member adapted to engage the valve body internally
thereof, a second hearing which has an axis of rotation
parts adapted upon the rotation of one feed part relative
to the other to effect movement of the gyratory means
member, a ?rst bearing through which the gyratory means
longitudinally of its axis of rotation, a movable support
hingedly connecttd to the abutment member at opposite
portions of the abutment member, a base plate adapted
parallel with and eccentric to that of the ?rst bearing
and through which the rotatable member is rotatably
paired, driving means arranged for rotating the gyratory
means, driving means arranged for rotating the rotatable
member, and means arranged for producing relative
the abutment member at opposite portions of the abut
mounted on the abutment member, of the rotatable and
to be secured on the valve body at an opening therein, 10 abutment members one member including co-operating
internally and externally threaded feed parts adapted upon
means pivotally mounting the movable support on the
the rotation of one feed part relative to the other to effect
base plate, biasing means adapted in operation by bear~
movement of the gyratory means longitudinally of its
ing on the movable support to urge the abutment mem
axis of rotation, a movable support hingedly connected to
ber against the valve seat face opposite that to be re
rotation of the feed parts.
4. A machine for repairing a valve seat face of a
parallel slide valve, comprising gyratory means for, apply
ing a tooling action to the valve seat face, a rotatable
member, a ?rst bearing through which the gyratory means
is rotatably mounted, on the rotatable member, an abut
ment member adapted to engage the valve body internally
thereof, a second bearing which has an axis of rotation
parallel with and eccentric to that of the ?rst bearing
and through which the rotatable member is rotatably
mounted on the abutment member, of the rotatable
and abutment members one member including co-operat
ing internally and externally threaded feed parts adapted '
upon the rotation of one feed part relative to the other
to effect movement of the gyratory means longitudinally
of its axis of rotation, a movable support hingedly con
nected to the abutment member at opposite portions of
the abutment member, biasing means adapted in opera
tion by bearing on the movable support to urge the abut
ment member against the valve seat face opposite that
to be repaired, the biasing means being adapted to exert
against the inner part of the valve body a reaction to
the force with which the abutment member is urged
against the valve seat face opposite that to be repaired,
driving means arranged for rotating the gyratory means,
driving means arranged for rotating the rotatable mem
her, and means arranged for producing relative rotation
of the feed parts.
45
ment member, a base plate adapted to be secured on the
valve body at an opening therein, means pivotally mount
ing the movable support on the base plate, an arm, piv
otally mounted on the base plate, a toggle hinged at one
end to the support and at the other end to the arm, the
toggle and arm being adapted to exert against an inner
part of the valve body a reaction to the force with which
the abutment member is urged against a valve seat face
to be repaired, a threaded push rod adapted for operating
on the toggle at the toggle joint, a threaded sleeve
mounted upon the base plate and engaging with the
threaded push rod, driving means arranged for rotating
the gyratory means, driving means arranged for rotating
the rotatable member, and means arranged for producing
relative rotation of the feed parts.
7. A machine for repairing a valve seat face of a
parallel slide valve, comprising gyratory means for ap
plying a tooling action to the valve seat face, a rotatable
member, a ?rst bearing through which the gyratory means
is rotatably mounted on the rotatable member, an abut
ment member adapted to engage the valve body internally
thereof, a second bearing which has an axis of rotation
parallel with and eccentric to that of the ?rst bearing and
through which the rotatable member is rotatably mounted
on the abutment member, of the rotatable and abutment
members one member including co-operating internally
and externally threaded feed parts adapted upon the ro
tation of one feed part relative to the other to effect
movement of the gyratory means longitudinally of its
axis of rotation, a base plate adapted to be secured on
the valve body at an opening therein, a movable support
5. A machine for repairing a valve seat face of a
hingedly connected to the abutment member at opposite
parallel slide valve, comprising gyratory means for ap
portions of the abutment member, means pivotally
plying a tooling action to the valve seat face, a. rotatable
mounting the movable support on the base plate, a spindle
member, a ?rst bearing through which the gyratory means
is rotatably mounted on the rotatable member, an abut 50 secured to the abutment member and adapted to extend
with clearance through and beyond an aperture in the
ment member adapted to engage the valve body internally
valve
body provided for the passage of the valve spindle
thereof, a second hearing which has an axis of rotation
and disposed opposite the opening, adjustable locating
parallel with and eccentric to that of the ?rst bearing
means adapted to locate the spindle with respect’ to the
and through which the rotatable member is rotatably
valve body at such aperture, driving means arranged for
mounted on the abutment member, of the rotatable and
rotating the gyratory means, driving means arranged for
abutment members one member including co-operating
rotating the rotatable member, and means arranged for
internally and externally threaded feed parts adapted
producing relative rotation of the feed parts.
upon the rotation of one feed part relative to the other
8. A machine for repairing a valve seat face of a
to effect movement of the gyratory means longitudinally
parallel
slide valve, comprising gyratory means for apply
of its axis of rotation, a movable support hingedly con 60
ing a tooling action to the valve seat face, a rotatable
nected to‘ the abutment member at opposite portions
member, a ?rst bearing through which the gyratory means
thereof, a base plate adapted to be secured on the valve
is rotatably mounted on the rotatable member, an abut
body at an opening therein, means pivotally mounting
ment member adapted to engage the valve body internally
the movable support on the base plate, an arm pivotally
thereof, a second hearing which has an axis of rotation
mounted on the base plate, a toggle hinged at one end
parallel with and eccentric to that of the ?rst bearing
to the support and at the other end to the arm, the toggle
and through which the rotatable member is rotatably
and arm being adapted to exert against an inner part of
mounted on the abutment member, of the rotatable and
the valve body a reaction to the force with which the
abutment members one member including co-operating
abutment member is urged against the valve seat face
internally and externally threaded feed parts adapted
to be repaired, toggle-operating means connected with
upon the rotation of one feed part relative to the other
the toggle, driving means arranged for rotating the gyra
to effect movement of the gyratory means longitudinally
tory means, driving means arranged for rotating the ro
of its axis of rotation, a base plate adapted to be secured
tatable member, and means arranged for producing rela
on the valve body at an opening therein, a movable
tive rotationv of thelfeed parts.
support hingedly connected to the abutment member, a
6., A machine for repairing a valve seat face of a
2,723,512
spindle secured to the abutment member and adapted
to extend with clearance through and beyond an aperture
in the valve body provided for the passage of the valve
vspindle and disposed opposite the opening, a locating
plate adapted to contact at adjustable positions the valve
body at the outer side of the valve spindle aperture, a
nut adapted by engaging the spindle and the plate to
locate the spindle with respect to the aperture, driving
means arranged for rotating the gyratory means, driv
ing means arranged for rotating the rotatable member, 10
10'
of the ?rst bearing, means coupling the ?rst and second
mounting members for movement of the axis of the
second bearing with the movement of the axis of the
?rst bearing to maintain a constant distance between
said axes, endless ?exible driving means coupling the
gyratory means for rotary drive by the rotary driving
member, driving means arranged for rotating the rotary
driving member, and means arranged for moving the
second mounting member relative to the supporting
means.
and means arranged for producing relative rotation of the
11. A machine for repairing a valve seat face of a
feed parts.
parallel slide valve, comprising gyratory means for ap
9. A machine for repairing a valve seat face of a
plying a tooling action to the valve seat face and hav
parallel slide valve, comprising gyratory means for ap
ing a cylindrical surface coaxial with its axis of rota
plying a tooling action to the valve seat face, means sup 15 tion, means supporting the gyratory means and main
porting the gyratory means and maintaining it with its
taining it with its axis of rotation both parallel to and
axis of rotation both parallel to and in a path around a
in a path around a ?rst ?xed axis and including co-oper
?rst ?xed axis, a rotary driving member for the gyratory
ating internally and externally threaded parts adapted
means spaced from the gyratory means, means support
upon the rotation of one part relative to the other to
ing the rotary driving member and maintaining it with
effect movement of the gyratory means in the direction
its axis of rotation both parallel to the ?rst ?xed axis and
of its axis of rotation, a rotary driving member for the
in a path around a second ?xed axis, the two paths being
gyratory means spaced from the gyratory means, means
identically similar, means operatively coupling the means
supporting the rotary driving member and maintaining
supporting the gyratory means and the means supporting
it with its axis of rotation both parallel to the ?rst
the rotary driving member for synchronous movement of 25 ?xed axis and in a path around the second ?xed axis,
their axes of rotation along the respective paths around
the two paths being identically similar, means coupling
the respective ?xed axes, endless ?exible driving means
the means supporting the gyratory means and the means
coupling the gyratory means with the rotary driving
supporting the rotary driving member for synchronous
member for rotary drive by the rotary driving member,
movement of their axes of rotation along the respective
driving means arranged for rotating the rotary driving 30 paths
around the respective ?xed axes, a driving belt
member, and means arranged for effecting movement of
coupling the gyratory means by engaging its cylindrical
the axis of the rotary driving member around the second
surface with the rotary driving member for rotary drive
path.
a
10. A machine for repairing a valve seat face of a
by the rotary driving member, driving means arranged
parallel slide valve, comprising gyratory means for ap 35 for rotating the rotary driving member, and means ar
ranged for effecting movement of the axis of the rotary
plying a tooling action to' the valve seat face, a ?rst
driving member around the second path.
mounting member,a ?rst bearing through which the gyra
tory means is rotatably mounted on the ?rst mounting
member, an abutment member, a ?rst connection through
which the ?rst mounting member is mounted on the 40
abutment member to permit ‘movement of the axis of
the ?rst bearing, a rotary driving member for the gyra
tory means spaced from the gyratory means, a second
mounting member, a second bearing through which the
rotary driving member is rotatably mounted on the sec 45
ond mounting member, supporting means for the second
mounting member, a ‘second connection through which
the second mounting member is mounted on the sup
porting means to permit the sameymovement of the
axis of the second bearing as the movement of the axis 50
References Cited in the ?le of this patent
UNITED STATES PATENTS
801,350
1,478,971
1,508,378
2,272,974
2,372,341
2,572,485
Williams ____________ __ Oct.
Lumsden ___________ __ Dec.
Brown _____________ __ Sept.
Indge ______________ __ Feb.
Shanley ____________ __ Mar.
Hunter ______________ __ Oct.
10,
25,
16,
10,
27,
23,
1905
1923
1924
1942
1945
1951
FOREIGN PATENTS
483,601
Germany ______________ __ Oct. 3, 1929
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