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Патент USA US2099960

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NW 23, 1937.
R‘ B. JOHNSON
2,099,961)
WRENCH
Filed Feb. 4, 1937
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2,099,960
Patented Nov. 23, 1937
1
UNITED STATES PATENT OFFICE
2,099,960
WRENCH
Raymond B. Johnson, Gladewater, Tex., assignor
of three-fourths to John Kraker, Gladewater,
Tex.
Application February 4, 1937, Serial No. 124,089
4 Claims. (Cl. 81—-106)
This invention relates to a wrench of the type stantially U-shaped and de?nes a guide through
including a handle having a stationary jaw at one
end and a movable jaw shiftable longitudinally of
the handle toward and away from the stationary
5 jaw whereby an article to be turned may be
gripped between the jaws.
One object of the invention is to provide a
wrench of such construction that the movable
jaw may be shifted away from the stationary jaw
10 for disposition of an article to be turned between
the jaws and the movable jaw then released so
that it may be drawn toward the stationary jaw
and thus cause the article to be ?rmly gripped
between the jaws.
‘
Another object of the invention is to provide
a wrench wherein the shank of the movable jaw is
pivoted to a yoke which ?ts about the handle or
shank of the stationary jaw and is engaged by a
spring serving to exert force upon the yoke and
20 draw the movable jaw toward the stationary jaw
and in addition cause the yoke to be tilted to such
a position that when the wrench is in use and
forward force exerted upon the movable jaw the
yoke will have binding engagement with the
handle of the stationary jaw and thus prevent the
movable jaw from slipping out of position to
properly grip the pipe or other article between the
jaws during a turning motion.
Another object of the invention is to provide
15
30 a wrench of this character with means for tilting
the yoke out of gripping engagement with the
handle or shank of the stationary jaw, this re
leasing means being in the form of a trigger or
lever extending rearwardly of the handle from the
0: Cr yoke where it may be easily actuated by the
thumb of the hand grasping the handle of the
wrench.
The invention is illustrated in the accompany
ing drawing; wherein
40
Figure 1 is a view showing the improved wrench
partially in side elevation and partially in section,
Figure 2 is a sectional view taken transversely
through the Wrench along the line 2--2 of Figure
1, and
45
Figure 3 is a sectional View taken along the
line 3-3 of Figure 1.
This improved wrench has a stationary jaw I
which may be formed integral with the forward
end of a handle 2 or separate therefrom and se
cured to the forward end of the handle in any
desired manner. Teeth 3 for gripping a pipe or
other round object are formed at the front of the
stationary jaw, and upon referring to Figures 1
and 2, it will be seen that the stationary jaw
has been formed with an extension 4 which is sub
which the shank 5 of the movable jaw 6 freely
passes. A leaf spring ‘I is secured at one end to
the rear portion of the stationary jaw by a screw
or equivalent fastener 8 and this spring is curved ~5
longitudinally, as clearly shown in Figure 1, in
order that its free end portion may bear against
the inner edge face of the shank 5 and yieldably
resist swinging movement of the shank towards
the inner end of the guide. It will thus be seen "10
that the movable jaw will be permitted to have
yieldably resisted play relative to the stationary
jaw to permit the wrench to be turned easily about
a pipe or other circular object 9 during movement
of the wrench in a retrograde direction but 15
cause the pipe to be ?rmly gripped between the
teeth 3 of the stationary jaw and ‘the teeth [0 of
the movable jaw when the wrench is swung in
a power stroke direction.
‘
l
.
The rear end of the shank 5 of the movable jaw N. 0
is pivotally mounted between the arms H of‘ a
clutch or yoke l2 by a pin l3, and referring to
Figures 1 and 3, it will be seen that the clutch is
provided with a cross bar l4 spaced from the
bridge l5 and de?ning a passage l6 through which 25
the handle 2 slidably passes. The confronting
faces I‘! and ll’ of the bridge l5 and the cross
bar H! are curved, as clearly shown in Figure 1 to
provide gripping surfaces which slope in opposite
directions and are adapted to ?rmly grip upper 30
and lower faces of the handle 2 when the clutch
is tilted or canted from the position indicated
by dotted lines in Figure 1 to the position shown in
full lines. When the clutch is in the position indi
cated by dotted lines and disposed at substantially
right angles to the handle ample space will be
provided between the gripping surfaces l1 and I1’
and the edge faces of the handle to permit the
clutch to be slid longitudinally of the handle in a
direction to move the movable jaw away from the
stationary jaw. A trigger or lever l8 extends
rearwardly from the clutch for engagement by a
thumb or ?nger of a hand grasping the handle,
and it will thus been seen that a person using
the wrench and holding it with one hand may very
easily tilt the clutch to the releasing position, in
dicated by dotted lines in Figure 1, and then
apply pressure forwardly of the wrench to thrust
the movable jaw forwardly away from the sta
tionary jaw a sufficient distance to permit a pipe 50
or other object to be engaged between the two
jaws. The lever is then released and a spring l9
which has its rear end anchored to the handle by
a screw 20 and its forward end engaged with a
bridle 2i pivoted to the arms of the clutch will 55
2
2,099,960
exert pull to swing the clutch towards the opera
tive position shown in full lines in Figure 1 and
draw the movable jaw towards the stationary jaw
to such a position that the pipe will be engaged
between the two jaws. When the clutch is in the
operative position shown in full lines in Figure 1,
it may be slid rearwardly along the handle and
pull exerted by the spring to move the movable
jaw towards the stationary jaw but strain exerted
10 upon the movable jaw and the shank 5 to shift the
clutch forwardly along the handle will cause the
clutch to be rocked forwardly to such a position
that the gripping surfaces l? and if’ will be
moved into tight gripping engagement with the
walls of the handle-receiving passage of said
clutch yoke being formed with cam surfaces for
gripping the handle when the upper end of the
clutch is forced forwardly, a spring carried by
said stationary jaw and extending into said guide
and engaging said. shank, a trigger extending
rearwardly from said clutch between the handle
and the pivotal connection of the clutch and
shank, and a spring extending longitudinally of
said handle with its rear end anchored to the
handle and its forward end connected with the
clutch yoke under said trigger.
2. In a wrench, a stationary jaw, a handle ex
of the movable jaw and the clutch will be
tending rearwardly therefrom, a guide carried by
said stationary jaw, a movable jaw in front of
the stationary jaw having a rearwardly extending
prevented. It will thus be seen that strain
exerted during use of the wrench cannot
shank loosely engaged through said guide, a
clutch ?tting loosely about said handle and
15 edge faces of the handle and forward movement
cause the movable jaw to shift forwardly
20 out of tight gripping engagement with a pipe
during movement of the wrench in a power stroke
direction. During retrograde swinging of the
wrench to obtain a fresh grip upon the pipe be
tween the jaws, the shank 5 will be permitted to
25 shift its position in the guide in opposition to ac
tion of the leaf spring I and the gripping teet
of the two jaws will slide about the pipe. It will
thus be seen that the wrench may be very easily
applied to a pipe and once a pipe is engaged be
30 tween the two jaws the usual oscillating motion
may be imparted to the wrench for swinging the
wrench in apower stroke direction to turn the pipe
and then swinging it in a retrograde direction into
position to obtain a fresh grip upon the pipe. If
.35 it is desired to dismantle the wrench in order to
‘make repairs or replace broken parts, it is merely
necessary to remove the pin 53 and the securing
screw 20 for the rear end of the spring i9 and the
movable jaw and its shank can be slid forwardly
V40 through the guide 4 and the clutch slid rearwardly
off the handle. Necessary repairs or replace~
ments can then be made and the wrench easily
and quickly reassembled.
Having thus described the invention, what is
45 claimed as new is:
1. In a wrench, a stationary jaw, a handle ex
tending rearwardly from said jaw, a guide car
ried by the stationary jaw, a movable jaw in front
of the stationary jaw having a shank extending
50 rearwardly through said guide, a clutch yoke
?tting loosely about said handle and having its
upper end pivoted to the rear end of said shank,
pivoted to said shank and provided with gripping
surfaces confronting faces of the handle and 20
adapted to ?rmly grip the same when the clutch
is tilted in one direction by pressure exerted upon
the movable ‘jaw during use of the wrench, and a
spring for urging the clutch toward its operative
position and exerting force to draw the clutch 25
and the movable jaw rearwardly.
3. In a wrench, a stationary jaw, a handle, a
movable jaw in front of the stationary jaw, a
shank for the movable jaw extending rearwardly
in spaced and substantially parallel relation to
said handle, a clutch pivoted to said shank and
loosely engaged about said handle, resilient means
for tilting the clutch in one direction towards its
operative position and exerting rearward pull
upon the clutch for drawing the movable jaw to 35
ward the stationary jaw, and means for tilting
the clutch out of a gripping position whereby the
clutch may be shifted forwardly and the movable
jaw moved forwardly away from the stationary
jaw.
.
4. In a wrench, a stationary jaw, a handle ex
tending rearwardly from the same, a movable jaw,
a shank extending rearwardly from the movable
jaw, a clutch pivotally carried by said shank and
?tting loosely about the handle and being mov 45
able into position to grip the handle by force ex
erted forwardly upon the movable jaw, and means
for exerting rearward pull upon the clutch below
its pivotal mounting to tilt the clutch towards
its operative position and draw the movable jaw '
rearwardly toward the stationary jaw.
RAYMOND B. JOHNSON.
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