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Y Feb. 8, 1949.
N. H. IVERSEN
“
2,461,059
CHUCK
Filed April 11, 1945
..
ATTORNEYS
~
Patented Feb. 8, 1949
2,461,059
/
UNITED STATES. 2,461,059PATENT, OFFICE‘
CHUCK
Norman H. Iversen, Birmingham, Mich., assignor,
to Production Brcaching Corporation, a corpo->
ration of Delaware
’ Application'April 11, 1945, Serial No.'587,666
2 Claims.
(Cl. 279-82)
‘
1
This invention relates to tool chucks or hold- 7
ers and particularly to chucks suitable for se
curing a tool such as ‘a breach to an actuating
head, the device of the present invention being
an improvement on the chuck disclosed in my
copending application Serial No. 517,688, ?led
January 10, 1944, now Patent No. 2,386,469.
This invention has for its object to provide a'
tool holding chuck in which the moving parts
the dogs. The dogs 8 are actuated by means of
a sleeve II'which has a» sliding ?t on the cylin
drical body member I, the sleeve II having an
annular internal recess I2 which in one position
of the sleeve permits the dogs 8 to move out
wardly to ‘tool releasing position. At the inner
end thereof the recess I2 has a beveled shoulder
I3 that is adapted to engage with shoulders It on
the dogs 8 to move the dogs inwardly to locking
are so housed that entry of liquid coolant carry
10 position, the inner end of the sleeve I I serving
ing metal particles to the bearing surfaces of the
to retain the dogs 8 in locking position. ‘
moving parts is prevented.
A spring I5 engages the inner end of the sleeve
An additional object is to provide a chuck of
II and serves to hold the same in its locking po- ,
the type in which the tool locking elements are
sition, the spring I5 being a coiled spring sur
actuated by a spring pressed sleeve in which the 15 rounding the body member I, With one end en
sleeve and its actuating spring are enclosed by a I
gaging the inner end of the sleeve II and its
shield that is attached to the tool receiving end
opposite end seated upon an annular disc I6 that
of the chuck.
?ts on the cylindrical portion of the body mem~
With the above and other objects in view the
ber I and seats against the enlarged portion 4
invention may be said to comprise the chuck as 20 of the body member. The _ sleeve I I has axially '
illustrated in the accompanying drawings, here
inafter described and particularly set forth in
the appended claims, together with such varia
tions and modi?cations thereof as will be appar
ent to one skilled in the art to which the inven
extending pins I‘! attached thereto that project
beyond the end of the body member
gagement with a stop plate I3 which
posed as to be engaged by the pins at
of movement of the actuating head 5.
I'for en
is so dis
one limit
The en
tion pertains.
gagement of the stop plates I8 with the pins I‘I
Reference should be had to the accompanying
drawings forming a part of this speci?cation, in
which:
position to the spring I5 to the position shown in
causes the sleeve II to be moved inwardly in op
Fig. 3 where the dogs 8 are free to move into the
Figure 1 is a side elevation of a chuck with a 30 recess I2 to tool releasing position so that a
tool may be inserted into or removed from the
portion broken away and shown in axial section;
bore 2.
Fig. 2 is a section taken on the line indicated
At the tool receiving end thereof the body
at 2-2 in Fig. 1, and
member I has a reduced threaded end portion I9
Fig. 3 is a longitudinal section showing the
upon which an annular shield 20 may be screwed.
chuck in tool releasing position.
The shield 20 is of an external diameter greater
The chuck of the present invention has a body
than the sleeve II and has axial openings 2I
portion I that is cylindrical throughout the ma
through which the pins I‘I extend. Suitable
jor portion of its length and. that has an axial
sealing rings 22 are mounted in the shield 20
tool receiving bore 2 opening to the end of the
cylindrical portion. The opposite end 3 of the 40 around the openings 2| for engagement with the
body member is threaded and an enlarged
axially movable pins I‘! and these sealing rings
wrench receiving portion 4 is provided between
provide seals which prevent the entry of liquid
the threaded portion 3 and the cylindrical por
coolant and metal particles through the open
tion of the body member. The threaded portion
ings 2|. The shield 20- has a cylindrical skirt
3 provides means of attachment to an actuat 45 portion 23 that encloses the sleeve II and spring
ing head 5, a locknut 6 being provided on the
I5, the inner end of the skirt 23 engaging with
threaded portion 3 between the enlarged portion
the spring seating disc I6 and forming with the
4 of the body member and the head 5.
disc IS a housing for the sleeve and spring.
The body member I is provided with radial
The sleeve II is normally held in the position
openings 1 to the axial bore 2 and in the open 50 shown in Fig. 1 by the spring I5, the shield 20
ings ‘I dogs 8- are slidably mounted. The dogs
serving as a stop to limit the outward movement
B have tapered tool engaging ends that engage
of the sleeve. In this position of the sleeve the
in a. suitable recess in the tool and each dog 8
dogs 8 are held in tool locking position as shown
carries a pin 9 that engages in a slot III in the
in Fig‘. 1. During operation of the tool, metal
wall of the opening ‘I to limit the movement of 56 chips and liquid coolant containing ?ne particles
2,461,059
3
4
,
ing a tool receiving socket in one end and an
of metal may drop upon the upper end of the
tool, but this foreign matter which might other
wise clog the bearing surfaces of the moving
parts of the chuck is excluded from the moving
parts of the chuck by the shield 2e and sealing
external shoulder spaced from said end, the por
tion of the body member between said shoulder
and tool receiving end being cylindrical, means
for locking a tool in said socket, an annular disc
mounted on said body member and seated against
rings 22.
said shoulder, a lock. actuating sleeve slidable
It is to beunderstood that variations and modi
?cations of“ the speci?c deviceh'erein shown and
on'fsaid' body ‘member; ‘a spring: interposed be
comprising a sleeve slidably mounted on the
engaging said disc, said shield and disc forming
a housing ?xed to said body and enclosing said
sleeve and spring.
NORMAN H. IVERSEN.
tween said disk and sleeve, pins projecting axially
described for pui‘poses of illustration, may be
made without departing from the spirit of the 10, from the sleeve past the tool receiving end of the
body member, and an annular shield having
invention.
threaded engagement with the tool receiving end
What I claim is:
of said body member, said shield having openings
1. A chuck comprising _a body member hav
ing a tool receiving socket in we end, tool look; ' through which ‘said pins project, and a tubular
skirt‘portioh covering the sleeve and spring and
ing means carried by said body member, means
body member for actuating said locking means,
an annular shield of greater diameter than _the
sleeve attached to the tool receiving end of said
bodynmember and overlying the adjacent end of
REFERENCES ‘CITED
the “sleeve, said shield having axial openings
alined ‘with the sleeve and a tubular skirt por
tionienclo'sing thesleeve, axially extending pins
extending from said sleeve through ‘said openings,
A The ‘following references are of record
?le 'of this patent:
UNITED STATES PATENTS
a disc _?xed to said body and closing the inner
end 'ofnthe ‘annular space between said skirt and
said bodykand a spring interposed between said
discand said sleeve to normally hold said sleeve
against'saidoverlying portion of said shield.
2. A chuck comprising a body member hav
the
'
Number ‘
to
Name
Date’,
. 1,209,572
Fég'léy :_ __________ .. Dec. 1-9, v1916
‘2,081,940
King _' _______ __'__'__ May 18, 1937
v2,386,469
Iversen ____ __‘ _____ __Oct. '9, 1945
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