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Патент USA US3052290

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Sept. 4, 1962
FiledJuly 16, 1957
Z5 Sheets-Sheet 1
J47 A4 Call/N
/7 Q“
Sept. 4, 1962
Filed July 16, 1957
3 Sheets-Sheet 2
Jay A4 COAA/A/
Jay/v 6. 6422577‘
477 i/VEV
Patented Sept. 4, 1962
.l'ay H. Collin, Pasadena, and John C. Garrett, Arcadia,
Calif-5 said Garrett assignor to said Collin
Fiied duty 16, 1957, Ser. No. 672,226
11 Claims. (Cl. 153-79)
FIGURE 3 is an enlarged sectional view of the ?aring
tool taken along line 3-3 on FIGURE 2;
FIGURE 4 is a transverse sectional view taken along
line 4-4 on FIGURE 3;
FIGURE 5 is an enlarged fragmentary view similar
to FIGURE 3 but showing the end of a tube as ?ared
by the plunger; and
This invention relates to ?aring tools and more par
FIGURE 6‘ is a side elevational view partly in section
ticularly to an improved bench mounted tool for ?aring
showing the same ?aring too-l illustrated in FIGURE 1
the ends of both metal and plastic tubing with greater 10 powered by a hydraulic actuator for the plunger.
speed and uniformity than is possible with prior devices.
Referring to the drawings and more particularly to
The present invention has been designed to meet the
FIGURES l to 5, there is shown a ?aring tool designated
needs of small shops and manufacturing facilities for
generally 10‘ having a main frame comprising a base
an accurate fast-operating ?aring tool representing labor
plate 11 and an upright central pedestal 12 joined to the
and time-saving advantages over prior hand ?aring tools,
base by a pair of parallel legs 13-—-13. These legs co
yet utilizing a far less elaborate and expensive structure
operate to provide an open-ended guideway 14 extending
than automatic type ?aring tools feasible only in large
longitudinally of the tool with its lower surface ?ush
scale operations. Accordingly, there has been provided
with the top surface of base 11 and providing a support
by the present invention a rugged tool adapted to be
for a tubing clamping device designated generally 15.
rigidly supported on a work bench and having means for
Clamping device 15 comprises a pair of generally similar
clamping pipes of various sizes with their ends centered
jaws 16 and 17 connected at one end as by pins 18 and
with respect to a ?aring plunger. The design of the tool
19 to the tongue 26 of a slide limiting member 21. A
for rigid mounting on a ‘bench has important advantages
keeper pin 22 projecting laterally from the rear ends
in that it leaves the hands of the operator free to manip
of member 21 is positioned to abut the rear sides of
ulate the pipe clamping means and to operate the ?aring
legs 13 of the frame member when clamping device 15
is pulled to its foremost position wherein at least one of
Other features of the design include automatic means
the jaws such as jaw 16 is outside guideway 14 and free
for heating the ?aring plunger to facilitate the ?aring of
to pivot laterally away from jaw 17. Thus it will be
plastic tubing and the relief of stresses resulting from
understood that members 21 and 22 serve to support
the ?aring operation. Another feature is the use of stop 30 the pipe clamping jaws 16 ‘and 17 assembled within the
means for accurately gauging the projection of the pipe
guideway 14 and to permit the to-and-fro sliding move
above the female ?aring die, thereby greatly speeding
ment of the clamping device between a closed position
the accurate clamping of the pipe and assuring uniform‘
within the con?nes of guideway 14 and an open position
results. A further and particularly important feature is‘
when withdrawn forwardly beyond the end of the guide
the use of a main frame so designed that it is usable
selectively with either a manual actuator or a hydraulic
way Without, however, permitting the complete withdraw
al of the clamping device.
As is shown in FIGURES 1 and 2, pipe clamping jaw
substituted for one another.
17 preferably has its square rear ends abutting the
Accordingly, it is a primary object of the present in
shoulder at the rear end of tongue 2% thereby preventing
vention to provide an improved bench-supported ?aring‘ 40 pivoting of jaw 17. This arrangement is considered by
actuator for the plunger, these actuators being readily
Another object of the invention is the provision of a
some users to facilitate the loading and unloading of
pipe sections in the receiving cavities.
However, it is
?aring tool selectively usable with either manual or hy
to be understood that the rear ends of jaw 17 may be
draulic power to actuate the ?aring plunger.
45 rounded similarly to the corresponding end of jaw 16
Another object of the invention is the provision of a
to the end that both jaws may be opened away from one
readily portable bench-mounted ?aring tool having quick~
another when the clamp- is withdrawn from the forward
end of guideway 14.
acting clamping means for rigidly gripping pipes of var
Clamping jaws 16 and 17 include a plurality of semi
ious sizes and featuring stop means for gauging the ex
tension of the pipe end beyond the ?aring anvil.
50 circular mating cavities 23 along the inner facing edges
Another object of the invention is the provision of a
of the jaws, these preferably being provided with threads
or sharp teeth 24 as is best shown in FIGURES 3 and 5
bench mounted ?aring tool having different sized multi
operating to bite into and grip the side walls of pipe to be
pie-cavity clamping means for pipe to be ?ared, the pipe
?ared. The upper or entrance ends of the pipe receiving
clamping means ‘being freely slidable in a guide passage
cavities 23 are ?ared as indicated at 25 at‘ an angle of
and having stop means for limiting the withdrawal of
approximately 45° and cooperate with the conical end
the pipe clamp while pipe is being inserted or removed.
of the ?aring plunger as ‘will be explained presently to
Another object of the invention is the provision of a
control the shape of the tube ?are. As herein shown,
flaring tool having a heated ?aring plunger adapted to be
‘the largest one of the tube receiving cavities is located at
maintained at a desired temperature for use in ?aring con
the forward end of jaws 16 and 17 and has clamped there
duit with the aid of heat.
in a section of tubing in readiness to be ?ared. Although
These and other more speci?c objects will appear upon
it is not essential, it is preferable to prow'de the forward
reading the following speci?cation‘ and claims and upon
end of one of the jaws, as jaw 17, with a positioning
considering in connection therewith the attached drawings
tenon 27. This tenon is held rigidly in assembled posi
to which they relate.
by a pin 28 and its free end 29 projects laterally from
Referring now to the drawings in which a preferred
jaw 17 and has a close sliding ?t with a slot 30 in the end
embodiment of the invention is illustrated:
of jaw member 16 ‘and assures the accurate mating of
FIGURE 1 is a side elevational view of a preferred
the two halves of the several pipe clamping cavities in the
embodiment provided with a manually-actuated operat
closed position of the jaws.
ing lever and having a section of pipe clamped therein
The means for assuring accurate registry with the pipe
in readiness for the ?aring operation;
clamping cavities 23 with the ?aring plunger‘ will be best
FIGURE 2 is a front elevational view of FIGURE 1;
understood by reference to FIGURE 4 wherein there is
shown a shouldered detent pin 33 having its rounded
inner end extending through a shouldered bore 34 extend
ing laterally through the side wall of guideway 14. This
pin is urged outwardly by a compression spring 35 having
one end seating against the shoulder at the inner end of
bore 34 and its other end bearing against head 36 of pin
33. The rounded inner end of pin 33 is formed to seat in
any one of the similar depressions or detents 37 formed
plunger 45 and having its rear end pivoted on pin 66 sup
ported in the opposite side walls of slot 6%. Normally
when the plunger is retracted, operating handle 61 is in
clined to the left as viewed in FIGURES 1 and 3 allow
ing spring 49 to hold plunger 45 retracted. Rotation of
handle 61 forwardly operates through cam head 6-2 to
depress lever 65 and the plunger thereby causing the coni
cal end 48 of the plunger to enter the end of tube 26
and ?are the same as is clearly illustrated in FIGURE 5.
As 10 Reverse pivoting of handle 61 to its full line position per~
in the side walls of jaw member I17 and spaced apart
the same distance as are the centers of cavities 23.
herein shown, the centers of depressions 37 are directly
opposite the centers of cavities 23.
The outer end of pin 33 bears against surface 318 of a
mits spring 49 to retract the ?aring plunger.
Another feature of the invention relates to a gauging
stop designated generally 76 and best shown in FIGURES
2, 3 and 4. This stop comprises a generally L-shaped
cam lever 39 pivotally supported in a slot 40 opening
laterally from one side of the tool frame and held in place 15 member having one leg 71 clamped to base it as by a
cap screw 72. The other leg 73 is offset upwardly so as
therein by a cap screw 41. Cam surface 38 is so shaped
to lie in a plane parallel to base 11 but spaced the proper
that when the lever is in the dot-and-dash line position
length of tube projection above the top surface of tube
illustrated in FIGURE 4 pin 33 is held retracted by
clamping jaws I6 and 17 required to form the ?ared end.
spring 35 out of detents 37 so that the pipe clamping de
vice 15 can be moved freely along ‘guideway 14. As the 20 In this way assurance is provided that the tube will project
far enough to provide a ?are of the required length yet
clamping lever 39 is moved to the right from the dot-and
one which does not ?are so far as to interfere with the
dash line position shown in FIGURE 4, it will be evident
assembly of the coupling members.
that cam surface 38 operates to press pin 33 inwardly
As is best shown in FIGURE 3, leg '73‘ of the ?are
to seat its rounded end in a desired ‘one of depressions 37,
thereby forcing teeth 24 of one of the pipe cavities 23 25 gauge device 70‘ is located slightly forward of the ?aring
plunger. In use, the cavity of the clamping jaws having
into tubing seated therein and also holding the jaws
?rmly locked closed and pressed toward the far side of
guideway 14.
a tube to be ?ared clamped therein is positioned below
stop leg 73 and the tube end is shifted upwardly until it
The ?aring plunger comprises a generally cylindrical
bears ?rmly against this stop. The operator then holds
the jaws clamped ?rmly against the tube as the clamping
device is pushed rearwardly in guideway 14 the short
‘distance required to center the tube beneath the ?aring
plunger. The part is then tightly clamped in this position
by swinging lever 39 forwardly about pivot pin 41.
member 45 reciprocably supported in vertical bore 46 at
the forward side of frame 12. The enlarged head 47 at
the lower end of the plunger has a conical end 48, the
base diameter of which is appreciably larger than the
largest one of pipe seating cavities 23. A spring 49 sur
rounds the upper end of plunger 45 and has its lower 35
Owing to the use of a single clamping screw 72‘ for sup
end bearing against frame 12 and its upper end against
porting stop means 70, the screw may be easily loosened
a split ring keeper 54) seated in a groove of the plunger,
allowing the stop to be swung to one side out of the path
of the tube whenever its use is not desired. It will also
be understood that the forward edge of leg 73 can be
the spring serving to hold the plunger retracted upwardly
with its head 47 seated against wall 51 of the frame.
A longitudinal well 52 extending downwardly to a 40 cammed upwardly to provide a pilot operating to shift
point near the tip of the plunger has seated therein an
an overly extending tube downwardly as the clamping
electric cartridge heater 53 provided with heavily in
jaws are shifted rearwardly in guideway 14.
sulated service cord 54 extending through a protective
Referring to FIGURE 6 there is shown an alternate or
tube 55 projecting through the side wall of plunger 45.
power actuator designated generally 80 for operating the
Wires 54 extend into an adjustable thermostatic control 45 ?aring plunger. This actuator comprises a cylinder 81
housing 56 secured to the side wall of frame 12 and
housing a piston 82 having its rim sealed against the
having a knob 57 cooperating with a scale 58 to facilitate
cylinder side wall as by an ‘O-ring 83. A piston rod 84
adjustment of the power supply to heater 53-. It will be
is secured to piston 82 by a nut 85 and has one end 86
understood that the power supply to the thermostatic
supported in a bore 87 and its other end passing through
control 56 may be provided in conventional manner.
an opening in removable end cap 88 for cylinder 81,
Normally, when using the device to ?are metal pipe con
piston 82 being urged upwardly to its retracted position
trol knob 57 will be turned to the off position since heat is
by a compression spring 89. A supporting bracket 96
seldom required or bene?cial in ?aring metal pipe. How
projects from end cap '88 and ?ts snugly between the
ever, when ?aring tubing made of certain metals and more
side walls of slot 60 of frame 12 and is locked ?rmly in
particularly of plastic it is quite desirable to maintain
assembled position therein as by inserting pivot screw
the ?aring plunger at a desired temperature as an aid in
'63 into opening 92 (FIGURE 6) and pivot pin 66. 'It
softening the end of the tubing as it is ?ared and to re
will be understood screw 63 does not seat in the same
lieve internal stresses caused by the ?aring operation.
Such preheating is found to prevent splitting of the tubing
opening used in supporting operating handle 61 but into
an identical alternate threaded hole 92.
and to facilitate natural thinning of the material rather 60
Pressurized air for operating piston 32 is supplied from
than elastic stretching with the result that the ?are takes
any suitable source through a conduit 94 opening into
a permanent set and does not tend to revert to its original
the top of cylinder 81 and controlled by a three~way
un?ared condition.
valve 95. A vent 86 in end cap 88 permits air to ?ow
Referring more particularly to FIGURES 2 and 3, it
into and out of the lower end of the cylinder. When the
will be noted that the upper half of frame 12 is slotted 61 Or rotating element 97 of the valve is in the position shown,
longitudinally as indicated at 60 for the purpose of mount
the air supply is cut off and the upper end of the cylinder
ing and supporting therein either a manual or a power
is vented to the atmosphere through vent opening 93.
actuator for ?aring plunger 45. As shown in FIGURE
However, when valve element 97 is rotated clockwise to
3, there is mounted in this slot a manual actuator com
bring the diarnetric passage 99 into alignment with con
prising handle 61 having a circular head 62 eccentrically 70 duits 94 it will be recognized that Vent 93 is closed al
supported on a pivot pin 63 having a threaded inner end
lowing pressurized air to‘ be supplied to the cylinder to
mating with a threaded opening in the side wall of frame
depress the piston and lowering piston rod 94 against
12 here shown ‘as being beneath the heat regulator 56.
?aring plunger 45 to ?are a tube end clamped in an
The lower side of head 62 bears against the forward end
underlying one of cavities 23. Reverse rotation of valve
of a lever 65 resting in turn on the upper end of ?aring 75 element 97 90° counter-clockwise cuts olf the air supply
and vents the top of cylinder 811 to the atmosphere allow
ing spring 89‘ to move the piston upwardly and allowing
pended claims.
the plunger to return to its retracted position under the
We claim:
in?uence of spring 49.
The mode of operation of the described ?aring tool
will be quite apparent from the foregoing detailed de
scription of its components and their relationship to one
another. Before using the tool, it is desirable, if not
or design herein shown other than as defined in the ap
1. A bench~supported heavy duty pipe ?aring tool read
ily convertible between power and manual operation, said
tool comprising a main frame having a generally horizon
tal guideway for a multiple cavity clamping device for
pipes of various sizes, a reciprocably supported ?aring
essential, to anchor the tool rigidly to a work bench. This
plunger movable toward and away from said guideway,
may be done either by seating the longitudinal edges of 10 an upwardly opening slot in said frame extending across
base 11 in the jaws of a bench vise making use of the
the end of said plunger, means associated with said slot
positioning grooves 1M along either edge or, in the alter
for selectively supporting therein manually operable lever
native, the base may be rigidly secured to a bench by bolts
means and hydraulic piston means whereby either type
passing through mounting holes 1131 at its rear corners.
of operator means can be employed to operate said
In either case, it is important that the notched opening 15 plunger.
102 centrally of the forward edge of base it should
2. A heavy duty pipe ?aring tool having an inverted
overhang the side of the vise or the side of the bench in
T-shaped main frame including the upright stem portion
order that a tube to be ?ared can be aligned with the
and a head portion forming a wide-surfaced supporting
?aring plunger.
base, said base including means thereon for securing said
?aring tool rigidly to a work bench, said frame being pro
To secure
15 is slid
a conduit
to bein?ared
slot 11-3‘
in the
‘id and
vided with a slideway of rectangular cross-section slidably
17 lie entirely forwardly of guideway 14- in which posi
supporting therealong a pair of elongated pipe clamping
tion jaw 16 can be swung freely to its open position to
jaws pivotally connected together near one end, said jaws
receive a conduit 26 in a cavity 23 of the appropriate size.
having a plurality of mating recesses along their facing lat
Since jaw 17 is preferably rigid with tongue 2d of mem
eral edges to clamp pipe ends of different sizes while being
ber 21, the pipe can be placed in the portion of cavity
?ared, a reciprocably supported normally-retracted ?aring
23 formed in this non-pivoting jaw member as jaw 16
plunger mounted vertically in the stem portion of said
is closed against the tube aided by the guiding in?uence
T-shaped frame having a pointed lower end movable to
of tenon member 27 and guide slot 3% in the end of
ward and away from an underlying pair of mating re“
jaw 16.
cesses in said clamping jaws, the stem portion of said
The jaws are now held loosely clamped against the
tube as device 15 is slid rearwardly to bring the end of
the tube beneath leg 73 of stop gauge 7%}, the tube being
adjusted upwardly until it seats lightly against the under
side of leg 73 for the purpose described above.
vso positioned, the clamping device is slid rearwardly be
neath the ?aring plunger as handle 39 is swung ‘forwardly
to seat pin 33 in cavity 37 thereby clamping the jaws
?rmly against the tube. If the manual operating handle
61 is assembled in frame 12, the ?aring operation is per
formed by pulling lever 61 forwardly causing the eccen
T-shaped frame being provided with a ‘vertically extending
slot opening through the upper end thereof and pivotally
trically supported cam 62 on the handle to depress lever
65 and plunger 45 into the tube thereby ?aring it as illus
trated in FIGURE 5. If the hydraulic power unit is sup
ported in frame 12; as shown in FIGURE 6, then the ro vii D1
tation of the three-way valve to supply air to the top of
the cylinder moves piston 82: downwardly against the
upper end of plunger 45 to ?are the tube. After the
supportinrr therewithin lever means having a cam in con
tact with the upper end of said ?aring plunger and consti
tuting manually-controlled means for depressing the plung
er against a pipe end clamped in said clamping jaws to
?are the same.
3. A pipe ?aring tool as defined in claim 2 character
ized in the provision of cam lever means pivotally sup
ported in the base of said frame including means operable
thereby to force said clamping jaws rigidly against the
opposite sides of a pipe end while holding said clamping
jaws against movement along said slideway and for hold
ing said pipe end in axial alignment with. the axis of
said plunger.
4. A pipe ?aring tool as de?ned in claim 2 character
ized in that in its normal retracted position the weight
of said lever is effective to counterbalance the lever away
plunger has been retracted by spring 49, clamping handle
from the upper end of said ?aring plunger, whereby a
39‘ is shifted reanwardly to release pin 33 from detent 50 deliberate act of an operator is required to pivot said lever
37 so that the clamping device can'be slid forwardly to
into a position effective to lower the plunger toward said
release the ?ared pipe. It will be observed that in the
described device both hands of the operator are free to
5. A pipe ?aring tool as de?ned in claim 2 character
handle the pipe and the two control levers 39 and or or
ized in that the opposite lateral edges of said frame base
the air valve control lever.
55 are cut away along their lower corners to seat the jaws
In the case of tubing made of certain metals or, more
of a bench vise, whereby said tool may be mounted in
particularly, plastic tubing, a Warm to hot plunger is ad
a vise while in use and then removed until again required
to ?are pipe.
vantageous in which eventuality control knob 57 of the
6. A pipe ?aring tool as de?ned in claim 2 character
temperature control unit is turned on to a desired setting
enabling heater cartridge 53 to maintain the ?aring 60 ized in that the pivot connection between the adjacent
ends of said clamping jaws includes an elongated member
plunger at the requisite temperature. it will be under
having a loose sliding ?t with said slideway, and stop
stood that the device is operated in exactly the same
means projecting from the outer end of said last-men
manner described above in ?aring plastic tubing except
tioned member engageable with the end of said slideway
that the plunger may be held depressed for a longer
period of time if necessary to heat-soften the end of the 65 when said jaws are pulled forwardly therealong to a posi
tion permitting the same to be swung apart to receive a
tubing. Normally, this holding period can‘ be cut to a
pipe end.
minimum by the proper setting of the thermostatic con
7. A pipe ?aring tool as de?ned in claim 1 character
trol for the heater.
in that said main frame is ‘of inverted T-shape with
While the particular ?aring tool herein shown and de
scribed in detail is fully capable of attaining the objects 70 said horizontal guideway extending transversely of the
head portion of said T-shaped frame and said upwardly
and providing the advantages hereinbefore stated, it is
opening slot being located in the upper end of the stem
to be understood that it is merely‘ illustrative of the pres
portion of said frame.
ently preferred embodiments of the invention and that no
8. A pipe ?aring tool as de?ned in claim 7 character
limitations are intended to the details of construction 75 ized in that the head portion of said T~shaped main frame
References Qited in the ?le of this patent
has a broad ?at lower surface adapted to be clamped to
a work bench with said plunger offset forwardly of the
edge of the work bench and in aXial alignment with
a pipe to be ?ared while clamped in said tool beneath
the lower end of said ?aring plunger, and means on the
head portion of said main frame for facilitating anchorage
of said frame to a work bench.
9. A pipe ?aring tool as defined in claim 8 character
ized in that the head portion of said main frame includes
manually operable clamping means for clamping said 10
clamping device for pipe with a selected one of its multi
ple cavities ayially aligned with the axis of said ?aring
10. A pipe ?aring tool as de?ned in claim 1 character
ized in that the lateral side walls of said upwardly open 15
ing slot in said main frame are pierced with a plurality
of pairs of aligned openings each pair of which is adapted
to receive and seat separate pivot pins for said lever means
and said hydraulic piston means and effective to hold
either one of said last named means operatively assem
11. A pipe ?aring tool as de?ned in claim 10 character
ized in that a plurality of the same ones of said separate
pivot pins are required for holding said lever means and
said hydraulic piston means assembled to said main frame 25
depending on which one of said last named means is se
bled in said upwardly opening slot.
lected for use with said main frame at any given time.
Brown ________________ __ Dec. 2, 1941
McIntosh ____________ __ May 30, 1944
Lyon _______________ __ Sept. 5, 1944
Rechton et al. ________ __ July 6, 1948
Marchant ____________ __ Feb. 1, 1949
Bachli et al. _________ __ Nov. 29, 1949
Watts ________________ __ Nov. 28, 1950
Franck ______________ __ Dec. 19, 1950
Downing ____________ __ Apr, 13, 1954
Quercetti et al. _______ __ Feb. 28, 1056
Franck ______________ __ June 30, 1959
Miller et al ___________ __ May 13,
Schultis _____________ __ Apr. 1,
McDonough _________ __ Mar. 17,
Solomon _____________ __ Apr. 14,
Parker ______________ __ Aug. 3,
Canada _____________ __ Aug. 23,
Great Britain _________ __ July 12,
Sweden _____________ __ Feb. 28,
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