Pipe-Wrench. Page: 4 of 7
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1,364,582
illustrated. This will free the grips B and
wedges C from the pressure of the master
wedge D so that the working end of the
wrench readily may be pushed into position
5 with its jaws F, F' partly embracing the
pipe and with the grips in more or less loose
condition. After being pushed into this
position the attendant will throw the lever
E into its closed position as represented in
10 Fig. 1, thus forcing the master wedge for-
ward against the grips B and pressing them
into place or into gripping contact with the
pipe or other object and this pressure of
the master wedge will be communicated to the
15 supplemental wedges C and to the other
grips B and also to the end grips B' so that
all of these will be set in position and locked
to grip the pipe. After this is done the
main handle G is pulled laterally, referring
20 to Fig. 1, so that the cam-shape end will be
turned about the pivot L thus causing the
cam surface 5 to spread the rear arms 6 of
the wrench jaws F, F' and this will cause
the jaws F, F' to close toward each other
25 and set the grips B firmly against the side
of the pipe or other object. The pressure ex-
erted by the cam 5 may be so great as to
crush the pipe and in order to prevent this
the shape of this cam surface is designed to
30 secure safety in this regard while insuring
that the gripping effect will be sufficiently
strong to do the work required.
The grips B and the wedges C are so
formed and proportioned that the grips B
35 will not touch the wall of the jaws F, F'
when the wrench is in closed position. The
pressure on the grips B will be through
their sides resting on the wedges C.
When the master wedge is retracted, the
40 grips will loosen up, and the space between
their outer ends and the wall of the channel
in the jaws F, F' is ample for this effect.
A lifting clamp is shown at 0 and a lift-
ing ring at P.
45 The wrench is shown in Fig. 1 in its grip-
ping position. As above mentioned the
wrench is engaged with the pipe by push-
ing it against the same, and in this respect
it is distinguished from those forms in which
50 the jaw consists of a ring in segments
hinged together to be engaged with the pipe
by a wrapping action of the ring segments
about the pipe, this action requiring han-
dling of the gripping end of the wrench,
55 which often results in accidents to the work-
man. It will be observed that the movement
of the handle which causes the turning of
the pipe is a continuation of the same move-
ment which causes the cam 5 to set the jaws
60 F, F' toward each other to make the grips
B firmly engage the pipe.
It will be observed that I employ no sup-
porting frame in my structure. The main
elements are so combined and interconnect-
65 ed as to avoid the use of any such support-ing frame additional to the main elements
themselves. In this connection it will be
seen from Figs. 2 and 8 that the base of the
jaw F has side plates spaced apart at a
greater distance than the side plates L' of 70
the other jaw F'. This relation of the parts
enables the base portion of the jaw F' to
enter between the side plates of the base
portion of the jaw F. The bases of both
jaws have openings J', Figs. 2 and 7 which 75
receive the pivot bolts J. The cam end of
the handle G lies between the side plates L'
of the base of the jaw F' which in turn lies
within the base of the other jaw F as just
described, and from Fig2 it will be noticed 80
that the pivoted pin L has its two parts
riveted in the opening L2 of the base walls
L' the ends of the riveted pin coming flush
with the surface of the parts to which they
are connected. 85
Briefly stated, I provide a wrench in
which the two jaws are pivoted together
and a handle is pivoted to one jaw and oper-
ates by its cam end upon the other jaw.
It will be observed that by reason of the 9o
construction involving the jaws each having
a base with spaced apart sides and with
the base of one fitting between the sides
of the base of the other and with the pivot
bolts for the jaws and handle arranged as 95
shown a symmetrical and well balanced
structure is provided. The pivot bolts are
in line with the longitudinal axis of the
wrench, that is to say with a line drawn
through the center of the wrench between ioo
the jaws.
I claim:
1. A wrench having a pair of opposed
jaws, relatively movable and spaced apart
to provide a fork like head, gripper means 105
carried by each of the said jaws, means for
setting the gripper means of both jaws
simultaneously in position to grip a pipe or
other object or for releasing said gripper
means, and means for relatively moving the 110
jaws toward and from each other, substan-
tially as described.
2. A wrench having opposed pivotally
mounted jaws with a space between their
free ends enabling the pipe or other object 115
to be received between them by pushing the
wrench thereagainst, a group of gripper de-
vices carried by each jaw movably mounted
in relation to each other and moved by con-
tact with the object to permit the object to 120
be received between the jaws, means car-
ried by the wrench for locking the groups of
gripper means on the jaws, and means for
moving the jaws toward each other to force
the gripper means against the pipe for turn- 125
ing the same when the wrench is turned,
substantially as described.
3. A wrench comprising jaws pivotally
connected and normally spaced apart. ena-
bling a pipe or other object to be received. 1302
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Reed, Clarence E. Pipe-Wrench., patent, January 4, 1921; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1256628/m1/4/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.