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Патент USA US3092388

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J1me 4, 1963
3,092,378
A. w. AULNER
COMBINATION VISE GRIP AND C-CLAMP
Filed Sept. 16, 1960
mm
INVENTOR.
BY A L ERT W. AU-LNER
United States Patent 0 ” "cc
1
3,092,378
Patented June 4., 1963
2
in the above-referred-to drawings, it is to be understood
3,092,378
that they are merely for the purpose of illustration and
COMBINATION VISE GRIP AND C-CLAMP
that various changes in construction may be resorted to
Albert W. Aulner, 703 S. Colorado, Hastings, Nebr
in
the course of manufacture in order that the invention
Filed Sept. 16, 1960, Ser. No. 56,547
may be utilized to the best advantage according to cir
3 Claims. (Cl. 269—143)
cumstances which may arise, without in any manner de
This invention relates to toggle actuated C-clamps and
parting from the spirit and intention of the device, which
more particularly it is an object of this invention to pro—
is to be limited only in accordance with the appended
vide a toggle actuated C'clamp in which the frame is of
claims. And while there is stated the primary ?eld of
substantially a C-shape and in which a pivot point for 10 utility of the invention it remains obvious that it may be
the fulcrum of a movable jaw is disposed farther from a
employed in any other capacity wherein it may be found
applicable.
'
toggle lever connected to and operating the movable jaw
than has been the case with products of this kind hereto
In the accompanying drawings, and in the following
fore.
speci?cation, the same reference characters are used to
A particular object of the invention is to provide a 15 designate the same parts and elements throughout, and in
toggle actuated G-clamp of the construction above men
which the numeral '10 refers to the invention in its en
tioned in which no power loss exists in the motion of the
tirety, numeral 12 indicating a C-clamp having a back 14,
movable clamping head.
More particularly it is an object to provide a construc
tion in which there is not only no power loss, but a sub
nating an adjusting screw threaded in a hub 22 on the
clamps of the kind having handles projecting rearwardly
in the lever 24.
from the frame.
Still another object is to provide a toggle actuated C
clamp, the frame portion of which is substantially of a
The adjusting screw 20 is provided with a head 48 that
is secured in position by a pin 50, and the upper end of
the clamp is provided with a latch 52 that is secured to
an upper arm 16 and a lower arm 18, numeral 20 desig
20 end of the arm 16, numeral 24 designating a movable
stantial power multiplication in the motion of the clamp
clamping head, clamping jaw or lever pivotally mounted
ing head as is of particular importance in clamping pieces
by a pin 26 in the end of the lower arm 18, numeral 28
of metal together in many kinds of production work where
a handle pivotally connected by a pin 30 to the end of
quick action and much power are needed.
the lever 24, numeral 32 designating a link pivotally con
A further object of the invention is to provide a toggle 25 nected by a pin 34 to a lobe 36 on the back 14 of the
actuated clamp with a frame of such a shape when the
clamp, and also pivotally connected to the handle 28 by
clamp is substantially closed, such as for clamping two
a pin 38, and numeral 40 a tension spring connected by
-thin sheets of sheetmetal, the total length of the clamp
a pin 42 to the back of the clamp, and having a hook
is substantially less than is the case with prior art toggle
44 on the opposite end that is positioned in an opening 46
‘
‘C-shape whereby the fulcrum point or pivoting connection
the ‘arm 16 by a screw 54 ‘and retained in adjusted posi
between a clamping head and the frame is much nearer 35 tions set by a set screw or thumb screw 56. The screw
the clamping end of the clamping head than heretofore '
54 extends through one end of the elongated latch 52
- in order that the frame, which extends on both sides of
and the other or free end of the latch '52 is normally
the clamping head, can provide the clamping head with a
disposed between the threads of the threaded shaft 20 and
much greater amount of extra support than has heretofore
in a position not to interfere with rotation of the shaft
been available with clamping frames of an L-shape or 40 but yet in a position such that when the thumb screw
a Tashape.
56 is ‘operated, the latch 52 will engage the threads of
Still another object is to provide a toggle actuated C
the shaft 20 with a pressure that will tend to; prevent the
clamp, the adjusting screw of which is provided with spe~
shaft 20 from undesirable rotation so that the clamp ‘can
cial means for preventing the screw from rotating whereby
be shifted from one set of work pieces to another without
.the screw can be maintained in a ?xed position so that 45 accidental and unwanted rotation of the shaft 20‘.
the clamp can be moved from one set of work pieces to
The threads of the set screw 56 engage the walls of
an opening in the latch 52 which retains the screw 56
in the latch 52 in a movable manner for adjusting the
another'without loss of its adjustment. This is of particu
_lar advantage in production operations where work pieces
of the same thickness are being repeatedly clamped to
gether.
I
50
And a still further object is‘t-o provide a toggle action
self-locking clamp- which is of a simple and‘ economical
construction.
Other and further objects and advantages of the present
invention will be apparent from the following detailed 55
description, drawings and claims, the scope of the inven
tion not being limited to the drawings themselves as the
drawings are only for the purpose of illustrating a way in
which the principles of this invention can be applied.
Other embodiments of the invention utilizing the same 60
or equivalent principles may be used and structural’
changes may be made as desired by those skilled in the
art without departing from the present invention and the
purview of the appended claims.
65
In the drawings;
FIGURE 1 is a side'elevational view of the improved
toggle action clamp with the elements shown in a locking
position in full lines, and in a released position in broken
position of the latch 52.
The lower end of the adjusting screw 20 is provided
with a gripping jaw 53 that is freely held on a stem
60 by a swivel joint 62.
I
A similar gripping jaw 64 is provided on the end of
the lever 24, ‘and the jaw 64 is positioned to coact with
the jaw 58, as shown in FIGURE 1.
The opposite end of the lever 24 is positioned between
side walls 66 and 68 of the handle 28‘, and the pin 30
extends through the lever and side walls.
The link 32 is provided with a projection 70' that is
positioned to engage the inner surface of the handle 28
with the clamp in the locking position, as shown in full
lines in FIGURE 1, to provide a stop or lock for retain
ing the gripping jaws in holding relation with work or
the like.
The lower end of the clamp is bifurcated from the low
er surfaces of the arms 18 to the broken line 72, and
the lever 24 is positioned between the side sections
of the end of the clamp.
lines.
Operation
FIGURE 2 is an end elevational view of the clamp with 70
the parts as shown in full lines in FIGURE 1.
In use the gripping jaws 53 and 64- are opened by
While one embodiment of the invention is illustrated
pulling the handle 28 outwardly to the position indicated
3,092,378
between thejaws, ‘The handle 28 is then forced in
41.
whereby said lower arm side portions tend to provide
the clamping head with much greater extra support than
would the back frame portion alone, means pivotally
attaching said clamping head to said lower ‘arm portion
wardly to the’position shown in full lines wherein the
for pivoting about an axis normal to the sides of said
3
l
by the broken lines 74, and the jaw 58 is adjusted by
the screw 29 to compensate for the size of a nut, bolt
head, 1or other work, so that the work may be positioned
clamping head midportion, a gripping element carried
by said m‘ovable clamping head and positioned to coact
plane extended through the axes of the pins 30 and 34,
with the gripping element of the adjusting screw, a handle
whereby the parts are locked in such positions that’ the
work is locked between the jaws 58 and 64. The spring " pivot-ally connected to the clamping head, a toggle link
40 urges the end of the lever 24 to which the spring 10 positioned with one end pivotally connected to the back
of the frame and with its other end pivotally connected
is connected upwardly to the position shown in broken
to said handle,’ said axis of pivoting of said clamping
lines.
ihead being disposed at ‘least as close to a line through
To release ‘the work from vthe gripping jaws it is only
the ‘axis of said adjusting screw as to said handle-to-clamp
necessary to pull the handle 28 outwardly to the position
shown in brokenlines.
‘ 15 ing-head pivotal connection, whereby there is no power
loss across said clamping head.
It will be seen that special advantages are gained in
2. In a self-locking lever actuated clamp, the com
having the frame of a C-shape instead of merely an L
bination which comprises a C-shaped frame having a
shape, because this provides the lower arm portion 18,
back with upper and lower arms, an adjusting screw
making possible ‘the pivotal connection at 26 nearer the
axis of the threaded shaft 20 than to the pivot pin 30‘. 20 threaded in the extended end of said upper arm, a grip
ping element mounted on said adjusting screw, said frame
In this way there is a power gain instead of a power loss
having a slot with parallel sidev walls therein extending
across the clamping head‘ 24. In many types of work
through said lower arm portion and also through an ad
this is very important. In still other types of work, it
jacent portion of the ‘back of said frame for dividing
is only necessary that there be no power loss across the
clamping ‘head 24 which latter is made possible by having 25 said lower arm and said portion of said back into two
side portions, a movable clamping head having a mid
the pin 26 as close to a line through the center of the
portion with parallel side surfaces, said mid~portion being
threaded shaft 20 as to the pin 39.
snugly and slidably received between the lower arm side
It will be further seen that the frame has a slot 99
portions and said lower arm portion being of a substantial
therein, the slot 96 having parallel side walls, and the
slot 90 extending through the lower arm portion 18 and 30 length whereby said lower ‘arm side portions tend to pro
vide the clamping head with much greater extra support
also through an adjacent portion of the back 14 of the
than would the back frame portion alone, means pivotally
clamp frame up to the dotted line 72 for dividing the low
attaching ‘said clamping head to said lower arm portion
er arm and the corresponding portion of the back 14 into
for pivoting about an axis normal to the sides of said
two side portions, the said two side portions having
center of the pin 33 moves ‘over the center or through a
parallel side walls adapted to snugly 'andmovably receive 35 clamping head mid-portion, a gripping element carried by
said movable clamping head and'positioned to enact with
the gripping element of the adjusting screw, a handle
pivotally connected to the clamping head, a toggle link
length whereby the lower arm side portions 89 tend to
provide the clamping head with a much greater extra‘ ' positioned with one end pivotally connected to the back
support than would the back frame portion alone. The 40 of the frame and with its other end pivotally connected to
parallel side surfaces of the clamping head 24 can be
said handle, the distance from said handle-to-clamping
head pivotal connection to the axis of pivoting of said
seen at 25.
From the foregoing description, it is thought to be ob
clamping head, being over one and one-half times the
vious that a self-locking lever action clamp constructed
distance from the said axis of pivoting of said clamping
in accordance with my invention is particularly well 45 head to a line extending through the axis of said screw..
a mid portion 92 vof the clamping head 24 and it will be
seen that ‘the lower arm portion 18 is of a substantial
adapted for use, by reason of the convenience and facil
3. The combination of claim 1 in which an elongated
ity with which it may be assembled and operated, and it
-latch member has one end attached to the upper arm of
will also be obvious that my invention is susceptible of
said frame and a free end disposed between the threads
some ‘change and modi?cation without departing from
of said screw in a position so as normally to not inter
the principles and spirit thereof, and for this reason I do 50 fer-e with screw rotation, and a set screw threaded through
not wish to be understood ‘as limit-ing myself to» the precise
said latch and engaging said upper arm whereby a turning
arrangement and formation of the several parts herein
of said set screw can place said latch in a position to en
shown in carrying out my invention in practice, except
gage ‘against the adjusting screw and to lock said adjust
as claimed.
.
ing screw against rotation.
Having now described the invention that which is
claimed to be new and desired to be procured by Letters
References Cited in the ?le of this patent
Patent, is:
UNITED STATES PATENTS
1. In a self-locking lever actuated clamp, the combina—
tion which comprises a C-shaped frame having a back
1,042,610
Schulz _______________ __ Oct. 29,
with upper and lower iarms, an adjusting screw threaded 60 2,316,073
Kellogg ______________ __ Apr. 6, 1943
in the extended end of said upper arm, 'a gripping element
mounted on said adjusting screw, said frame having a
slot with parallel side walls therein extending through
said lower arm portion and also through an adjacent
portion of the back of said frame for dividing said ‘lower 65
arm and said portion of said back into two side portions,
a movable clamping headhaving a mid-portion with
all‘
2,395,607
2,466,937
2,490,923 r
Susgen a _____________ __ Dec. 13, l949
2,617,458
Kelly _______________ __ Nov. 11, 1952
2,641,149
Petersen ______________ __ June 9, 1953
2,855,964
Zelazny _____________ __ Oct. 14, 1958
310,905
Switzerland __________ _._ Nov. 15, 1955
parallel side surfaces, said mid-portion being snugly and
slidably received between the lower arm side portions
and said lower [arm portion being of a substantial length
Aalberg _; ___________ __ Feb. 26, 1946
Downs ______________ __ Apr. 12, 1949
FOREIGN PATENTS
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