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Патент USA US2833543

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May 6, 1958
'Filed Jan. 9, 1956
Fire. 2
, BY éZlzbwafhrw'
nited States Patent- alike
Patented May 6, 1958
2 ,
with pipe of all diameters as well as being accurately ad'
' justable to a pipe of any given diameter.
A better understanding of the present invention will
be had by reference to the accompanying drawings, il-.
Timothy E. Pannell, Ventura, Calif.
Application January 9, 1956, Serial ‘No. 557,946
3 Claims. (Cl. 266-23)
lustrating a preferred embodiment of the invention, and
in which:
Figure 1 is an isometric view of the pipe cutting ma
chine in position on a pipe; and
Figure 2 is an enlarged view of a portion of the ap
10 paratus enclosed in the circular arrow 2 of Figure 1.
There is shown in Figure 1 a preferred embodiment of
the pipe cutting machine of the present invention dis
posed in an operating position on a pipe 10, which in
turn is mounted on a supporting structure 11. The pipe
This invention relates generally to a portable pipe 15 cutting machine generally comprises a lower carriage as
cutting machine, and more speci?cally to a machine
sembly 12'to which is hinged an operating assembly 13.
adapted for circumferential cutting, scalr?ng, beveling, _
The carriage assembly includes a channel base, member
welding, or the like of pipe, which is readily adaptable for
application in conjunction with pipes having a wide range
of diameters.
' Although the invention is illustratively‘ entitled and
described as a pipe cutting or scar?ng machine, it will be
appreciated that the features involved make the machine
suitable with slight modi?cations to the welding or bevel
ing of pipe and other similar circumferential pipe working
14 provided with a plurality of opposed spaced holes 15
in its opposite side portions. Two pairs of guide wheels
20 16 are axled, respectively, into two pairs of opposed holes
15 and are spaced a horizontal distance apart according
to the particular diameter or range of diameters of pipes
being cut. The wheels 16 are adapted to roll on the
periphery of the pipe 10.
Pivotably connected to one corner of the base mem
ber 14, as by a bolt 17, is a torch supporting arm 18
Portable pipe welding and pipe cutting machines are 1
well known,’ and although they are‘ satisfactory for
achieving the particular tooling result desired, most con
ventional machines involve rather complex mechanical
outer end, the arm 18 is provided with an upstanding
post 20 on which is adjustably positioned a torch assem
structures and are oftentimes dif?cult to operate, particu
larly where cutting operations must be performed on a
to clamp onto a torch assembly 22 and secure the torch
series of different diameter pipes.
provided with holes 19 spaced along its length. At its
bly supporting bracket 21. The bracket 21 is designed
assembly 22 in a desired‘ relationship to the pipe 10,
whereby a torch 23 will be disposed at a given axial cut
It is, therefore, an object of the present invention to
ting location for the pipe cutting operation.
provide a pipe cutting, scar?ng, or welding machine of 35 , A gripping arm 24 is rigidly secured to the base mem
relatively simple mechanical fabrication and construc
ber 14, as at 25, and is used as a means?of manually
tion, which may be readily adapted to pipes dimensioned J stabilizing and securely holding the carriage assembly
over a wide range of diameters.
12 in a convenient working position as the pipe cutting
Another ‘object of the present invention‘ is to provide
machine is operated.
a pipe cutting machine, which may be less expensively
The base member 14 is further provided with a ?anged
manufactured, and which may be more easily manipulated
slot 26 disposed between the opposite wheels 16 and
and carried from one working location to another than
adapted to guidably receive therethrough a ?exible mem
is possible with present day machines.
ber in the form of a V-belt 27. The lower portion of the
A still further object of the‘ present invention is to
V-belt is passed around the pipe 10 in a sling-likeman
provide a pipe cutting machine which has very few wear 45 ner and its upper portion is rotatably connected to the
ing parts and is correspondingly susceptible of limited
operating assembly in a manner to be subsequently de
maintenance, and yet which is extremely rugged in its
design and suitable for precision type work.
A hinge bracket 30, provided with a plurality of spaced
These and other objects and advantages of the pres 50 opposing holes 31, is rigidly secured to the base mem
ent invention are generally attained by providing a pipe
ber 14 at 32. A hinge pin 33 is disposed in a given op
cutting machine having a torch carriage means provided
posite pair of holes 31 and passes through a pair of ears
with rolling supports secured thereto adapted to ride on
34 extending upwardly from an adjustable support mem
the peripheral surface of a pipe. Driving means for im
ber 35. Support member 35 terminates at its free end
parting a relative rotation between the pipe and the car 55 in a handle 36 which is manually used for raising or low
riage means are pivotably connected to the carriage
ering the support member 35 in 'the direction of the‘ar
A ?exible means or member is rotatively se- -
cured to the driving means and is adapted to engage the
‘rows as shown.
A's1ot-3‘7 is provided near the handle
end of the support member 35, and a ratchet rod 38 ex
tends upwardly therethrough being pivotably connected
with the driving means, ‘whereby the ‘driving means may 60 to the base member 14 as at 39. The ratchet rod‘ 38 is
biased towards one end of the slot 37, as shown in Figure
be positioned in different spatial relationships with respect
periphery of the pipe'. Adjusting means are associated
l, by a spring member 40 secured to the ratchet rod and
.to the carriage means. As'a consequence, the ?exible
to the base member 14.
means used to engage the pipe may be brought into se
cured relationship with the pipe and thereafter used as a
means of causing relative rotation between the pipe and 65 secured by bolts 42 to the support member 35 and is
partially disposed around a lower shaft 43. Another por
the carriage means.
tion of the coupling member 41 terminates about an
An important feature of the present invention resides
upper shaft 44. The shafts 43 and 44 are jourualed within
in the fact that a structure is employed such that the
the coupling member 41 and are rigidly secured thereto
?exible means may be readily interchanged, according to 70 in a given spacing with respect to each other and with
the particular diameter pipe upon which the work is being
performed, whereby the machine is conveniently used 7
respect to the support member 35. Thus, any given angu
lar movement of the handle 36 about a pivot point at the
‘ An ‘important ‘feature ‘of ‘the ‘ present invention resides
hinge ‘pin 85 "will cause 'a 'correspondingangular move~
ment of the coupling member 41 and, in turn, of. the
' lowershaft 43 and upper shaft 44 journaled therein.
‘ At-the 'ou‘terrendlo'fithe shaft 143 is mounted a pulley
in the fact that it may be readily and simply adapted to
different diameter, pipes, even where the pipes are in
a completely different range of diameters. As is evident,
it is a simple operation to remove the wing nuts 61 to
take off the shield 46 and slide the V-belt 27 off of
the pulley 45 to thereby ‘permit installation of a larger
or smaller vsizeV-belt as required. Similarly, through
the action'o‘f ‘the‘support member 35 with respect to the
10 ratchet rod38, a precise and .yet ?rm engagement may
be caused between the V-belt 27 and the surface of the
45‘adapted tofdr'ive ‘the vibelt 27. The pulley '45 is
covered'jby a removable ‘shield 46, ‘the function‘of which
willg‘bedescribed 'in ‘connection with the operation of
44 is connected within a gear
’ _ case
47 'toYa 'driving‘pinion‘I50,jwhich in turn engages a‘gear
51 connected within the gear case 47 to the lower shaft
pipe regardless *of the diameters of the various sections
43. 'Thepini‘onSO, is‘itself, driven 'by, a large diameter
‘ pulley "'52. ' A‘ V-bclt '53 passes ‘around the pulley "52 >
and'out throug'ha slot ‘54 in the vgear casing 1.47 to ‘connect
with a‘driving pulley ‘55* The driving pulley‘SS is shown
mounted on ‘a shaft 56, which‘is manually rotatable by
handle ‘57, or‘w‘h'ich in‘certain application might be driven
through=poweredrmeans The shaft '56 is positioned for
adjustable belt tension‘ in a slot 58 provided in a ‘right
‘anglelibracketlmember 59'secured to‘the support mem
ber'3'5 “as, byr‘bolts '60. l
of pipe being used. , 7
It is apparent, ‘therefore, that the pipe cutting machine
of the present invention provides a mechanically simpli
?ed structure, which is conveniently operated, and yet
capable of expeditious use.
What is claimed is:
'l. A cutting machine for severing pipe comprising,
20 in combination: carriage means; rolling supports on said
"In ‘operation, the guide wheels ‘16 are ?rst positioned ‘
into ‘the ‘proper holes 15 ' for theparticular diameter ' pipe
being-used, Thereafter, ‘the shield 46, vis ‘more ‘clearly
shownlin‘the viewof Figure '2, is‘removedlfrom its posi
tion "over the‘ p‘ulley.45 by unscrewing the convenient
elongated wing nuts 61. Then, acc‘ording‘to the particular
diameter-‘pipe involved, -a V-belt'dirnensioned ‘accordingly
maybe placed aroundthe pipe 10-and passed up through
the slot 26over'thepulley45 as illustratively ‘shown with
carriage means adapted to ride about the periphery of
said pipe; a .torch supported on said carriage; means
for positioning said torch adjacent a circumferential point
of said pipe whereby rotation of said pipe against said
rolling supports ‘will result in said torch following a
desired path about Ithe vperiphery of said pipe; an oper
ating ‘assembly pivotably supported from one end of said
carriage "for 'arcuater‘movement laterally towards and
away from said pipe; drive means supported on ‘said
assembly; ?exible means‘operatively connected between
said drive means and said pipe for rotating said pipe, said
the =V-‘belt 27. Other adjustments may also‘be made‘lt‘o ' ?exible means being adjustable by said ‘arcuate move
accommodate lunusual size pipe .by positioning the pin , mentgisecuringmeans 'for'holding said assembly ‘at ditfer
33'in‘ditferentiholes 31 and similarly‘the bolt 17in differ
ent lateral distances from said pipe in vaccordance 'with
ent .holes 19 ‘of the torch ‘arm 18. Under ‘normal con
the diameter ‘thereof, .said securing means ‘comprising a
ditions, however, ‘it will usually not be necessary itolmake
ratchet rod pivoted adjacent‘ the other end of :said carriage
any of ‘the ‘above: adjustmentsaas the operating assembly '13
andextending‘past the'free end of said operating assembly;
is constructedtlto accommodate ‘thedia'meters ‘of 1most
‘and, biasing means .normally urging saidtratchet rod
pipes encountered vin a‘particulari?eld of workyfor ex
against a portion .ofsaidr operating assembly to engage
ample, 2 oil ‘?eld = drilling Iequipment.- .
40 said portion ‘and retain said operating assembly in a
:Having madeany-zadjustments thatimay be required, ‘the
machine is‘positione'd “on ‘the pipe 10 ‘on 1the ‘supporting ‘
guide wheels 16, and the handle 36 of the ~adjustable sup
port member 35 is ‘raised upwardly ‘to cinch the ‘V-belt
desired arcuatev position.
.2. .A machine according .to claim 1, in which said v
?e'xiblemeans comprises a‘belt passing through an open
ing in said carriagerto pass ‘under said‘pipe and up through
27 insecure:engagement‘aroundithe pipe 10.. .Thethandle 45 said opening aroundsaid drive means, the tension in said
36 ‘is raised to this‘ ‘position by :forcing‘ the ratchet rod
belt being adjusted by the lateral distance at which said
38. in the‘ direction‘offthe arrowr'against the action 'o'f'the
operating:assemblyris'held from said carriage.
spring .40; ‘upon proper .positioning, the .ratchet rod 38‘
3. :Amachine according to claim v1, in which the dis
maythen be released tolengage ‘the edge of the.~slot‘27,
tance'between'said rolling-supports is adjustable whereby
asshowngin Figure 1,‘ and hold ‘.the supporting ‘member 50 saidrrolling supports; can accommodate different diameter
35 securely thereto.
' I
Meanwhile,‘ of‘ course, the torch assembly 22 is,properly
positionediso that the .torch23‘ is disposed adjacentthe , ,
particular pipe section to be cut.1 It is‘now only necessary
to turn the handle 57 and the cutting operation will Icom
mence.‘ The rotation of the ‘handle 57 will in turnicause
rotation ofthepulleySSto drive the pulley 52, :the pinion
50,»the gear 51, the shaft43, and the Vabelt 27. Thezvabelt
willrin turn rotate ‘the pipe 10. along the supporting struc
ture (11.; ‘Because ofithe guide wheels '16, thezcarriageas
sembly 12 ‘and thus thepipe cutting machine as a whole
will “not rotate but willmerely‘ move a given linear distance
while the pipe ‘10 rolls thereunder. Thus, the pipe cutting
machine is always maintainedsin a convenient working
position to, the operator and he need merely move a small 65
distance, according to the particular diameter .of the ,:pipe
being‘ cut.
“ References Cited .inthe?le of this patent
Lust _______________ __ 'Jan.‘ 13,
‘Lawrence _.‘_ __________ __ Sept. 27,
.A'n'derson ___________ __ Nov. 20,
Hayes ______________ __ Apr. 27,
'Scircle _____________ __ Dec. 14,
iDahl _____________ .... Oct. 9,
Zumwalt ______ __'_ ____ __ May 13, 1952
'} 679,731
'Francc _ _________ _‘_..____ June ‘9, ‘I954
Great Britain 6.--; ____ __ Sept. '24, 1952
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