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Патент USA US3093029

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June 11, 1963
Filed Dec. 11, 1961
United States Patent ,O?ice .
Patented June 11, 1963
ing'on the stud when the teeth of the nut are separated
from the teeth of the wrench jaw and shank.
The invention will be best understood from a considera
Emil Bohnet 204 Ontario St., Buffalo 7, N.Y.
tion of the following detailed description‘ taken in con
Filed Dec. 11, 1961, Ser. No. 158,241
4 Claims. (Cl. 81—166)
nection with the accompanying drawing wherein:
FIG. 1 is a view in perspective of a wrench showing
This ‘invention relates generally to the class of tools
and is directed particularly to improvements in wrenches
my new invention.
FIG. 2 is an exploded view of the head end of the same.
FIG. 3 is a section taken substantially on the line 3—v—3
of the adjustable jaw type.
In the use of wrenches of the type where there is a 10
?xed jaw "and an adjustable jaw and wherein a means,
usually screw threaded, is provided for moving the
adjustable jaw relative to the ?xed jaw to adapt it to a
of FIG.
Referring now more particularly to the drawing, the
numeral 10 generally designates a movable jaw wrench of
a well known type of construction which, in combination
nut or bolt head,‘ engagement of such means with the
with'the novel structure of the present invention, gener
hand in using the wrench, or with some other object 15 ally designated 12, forms the new and improved wrench
when ‘laying the wrench down ‘or picking it up, may
vThe wrench body 12 comprises an elongate handle 14
cause the threaded adjusting means to be moved and thus
change the location of the movable jaw.
from an, end of which extends-the shank 16 which is of
rectangular or square cross-sectional form. The shank,
It is a particular object of the present invention, in
view .of the foregoing, to provide a novel means whereby 20 is attached at one end to the end of the handle 14 and
extends longitudinally of and from the handle and carries
the movable jaw of a wrench of the type referred to,
can be ?rmly locked in position after the jawhas been
on its other end, the ?xed jaw 18, the working face of
adjusted to the desired span, and thereby prevented from
moving out of adjustment by reason of repeated handling
which is designated 20'.
of the wrench or engagement of the adjusting screw
against adjacent objects.
cross-section, having the upperor back surface 22, the
Another object of the invention is to provide a novel
locking means for the adjustable jaw of a wrench of the
face 26.
character stated, which means isoperatively coupled with
the movable jaw 28. This jaw has an opening formed
As stated, the shank is of either square or rectangular
oposite side surfaces 24 and the under or bottom sur
Mounted for sliding movement on the shank 16 is
"the body of the wrench in such a way that it can be 30 therethrough as at 30 to receive the shank 16. This
‘easily and quickly moved into and out of locking position
opening is of the same contour as the shank so that the
,jaW, must maintain its position on the shank at all times
with respect to the movable jaw, and at the same time
whereby the working face 32 of the jaw 28 is maintained
in opposed relation with the working face 20 of the ?xed
cannot become detached from the Wrench and thereby
become lost.
‘Still another object of the invention is to provide a 35 jaw.
Encircling the shank 16 and located between the mov
novel locking means for the adjustable jaw of a wrench
able jaw 28 and the handle 14 is a-guide yoke 34. This
of the character stated, wherein such locking means is
yoke is in spaced relation with the jaw 28 but‘ is connect
designed to form a bridging coupling between the back
ed thereto by the arm 36.
of the movable jaw 'and‘the shank of the wrench to which
‘the ?xed jaw is connected.
The yoke 34 is threadably connected with the forward
A ‘still further object of the invention is to provide a
novel locking device which can be applied to, a conven
end of a feed screw 38, the back end of which screw
carries the knurled head 40 which is rotatably connected
with the forward end of the handle and is peripherally
tional type of adjustable jaw wrench.
engaged in a recess 42 in the underside or front side of
The invention broadly is embodied in a U-shaped
locking nut having one side member of the U formed 45 the shank 16 to hold it against axial movement. This
rotatable mounting of the feed screw 38 and head 40
with two transversely toothed faces or ‘surfaces offset
with respect to the handle 14 and the shank 16 is of a
one from the other. These toothed surfaces are designed
standard and well-known design and accordingly, no il
for one to engage correspondingly formed teeth extend
lustration'of the same is given or believed to be neces
ing‘across' the back surface of the movable jaw of the
wrench while the teeth of the other surface are designed 50 sary to an'understan'ding of the operation of the wrench.
to engage corresponding teeth 'formed transversely of
The unit 12 comprises a threaded stud 44 which is se
cured at one end to the back 46 of the movable jaw 28
"the back of the shank ofthe wrench on which the mov
able jaw is supported for adjustment.
to extend therefrom perpendicular to the back face or
' ‘A threaded stud carried' by the back of the movable
side 22 of the shank 16.
jaw extends through the two sides of the‘ U-shaped nut
and passes through and‘ is threadably connected with
In the‘ construction here illustrated, there is provided
a plate 48 which is attached by welding or the like to the
back 4670f the jaw 28‘ and by means of which the end of
‘the stud 44 is connected with the back 46 of the movable
jaw. This plate 48 is shown as having a number of teeth
a knurled nut located between the side members of the
j U-shaped nut. By manipulating the knurled nut, the
. U-shaped nut may be'shifted to bring ‘the teeth thereof
into engagement with the teeth of the movable jaw and
shank or to move the teeth apart for freeing the movable
jaw so that it may be adjusted on the wrench shank.
Guide means interconnects the U-shaped nut [with the
threaded stud to maintain the U-shaped nut against turn
6O '
59 formed across the outer or top surface thereof.
While this is a prefer-red arrangement or construction
wherein the plate carries the teeth and the stud 44 is at
tached to theplate and by this means attached to the mov
able jaw, it will also be readily apparent that the stud
may be welded or otherwise secured directly to the jaw
28 and a number of teeth corresponding to the teeth 50'
may be formed across the back of the jaw.
The back face 22 of the shank 16 is likewise provided
with a plurality of teeth 52 which extend transversely of
the shank and which are parallel with the teeth 50 car
ried by the back of the movable jaw 28.
The numeral 54 generally designates a locking nut
invention, after the jaw 28 has been set to have the
proper spacing between the face 32 and the face 20 of
the ?xed jaw, by rotating the adjusting screw 38, the
locking nut 54, which, of course, would be disengaged
from the teeth of the shank 16 and the movable jaw 28,
while this adjustment is being made, would then be
moved inwardly so as to bring the teeth of the locking
nut into engagement with the teeth of the movable jaw
which is roughly of U formation or is U-shaped, com
28 and the shank '16. Thus, the movable jaw would be
prising the relatively broad spaced parallel legs 56 and 10 ?rmly locked in position relative to the shank '16 so
58 connected by the intermediate portion 60.
that any contact of the adjusting nut 40 with the hand
As shown, the leg 58 has a back end portion 62 which
or other object would not cause movement of the mov
is materially thicker than the forward end portion 64 so
able jaw 28, and accordingly, the setting of the wrench
that the outer side of this leg has two surfaces, one of
jaws will be maintained.
which is o?set with respect to the other, and which sur 15
It will also be apparent from the foregoing that the
faces are provided with the transversely extending teeth
wrench and locking means may be constructed as a unit
66 and 68.
at the time of manufacture of the Wrench or the locking
The legs 56 and 58 have formed therethrough the
means may be readily adapted to a wrench of the type
aligned openings 70 and 72,, the opening 72 passing
described by providing the shank ‘16 with'the necessary
through the thinner forward end portion 64 of the leg 20 teeth and by securing the part 48 to the back or top
58. These aligned openings 70 and 72 are of -a diameter
of the movable jaw 28 by welding or the like.
to receive the stud 44 and when the locking nut is
As this invention may be embodied in several forms
mounted upon the vstud 44, in the proper manner, the
without departing from the spirit or essential character
teeth 68 of the thinner portion 64 of the leg 58 will be
istics thereof, the present embodiment is therefore illus
disposed for engagement with the teeth 50 carried by the 25 trative and not restrictive, since the vscope of the inven-'
back of the movable jaw 28 and the thicker portion 62
tion is de?ned in the appended claims, and all changes
of the leg 58 will extend behind the ‘adjustable jaw 28
that fall within the metes and bounds of the claims,
toward the shank 16 so that the teeth '66 thereof may en
or that form their functional as well as conjointly co
gage between the teeth 52 of the shank simultaneously
operative equivalents, are therefore intended to be em
with the engagement of the teeth 68 with the teeth 50.
braced by those claims.
A setting or adjustment nut of circular form, desig
I claim:
nated 74, is of a thickness to be positioned between the
1. In an adjustable jaw wrench, a body comprising in
opposing surfaces of the two legs 56 and 58 and is
one rigid unit, a handle, a shank having a front side and
adapted to be threaded on the ‘stud 44. Accordingly, it
a back side and a ?xed jaw carried by and projecting
will be seen that the setting or adjusting nut 74 will be 35 from the front side of the shank, a movable jaw on the
, retained between the legs of the locking nut and when
the nut 74 isrotated on the ?xed stud 44, the locking nut
will be moved relative to the wrench shank 16 and the
shank and having a back side portion lying across the
back side of the shank, means threadably coupling the
movable jaw with the {shank for effecting sliding adjust
movable jaw 28.
ment of the movable jaw on the shank relative to the
The locking nut 54 is prevented from rotating about
?xed jaw, and other means for locking the movable jaw
the stud 44 and thus getting the teeth 66 and 68 out of
against movement after its adjustment and comprising
alignment with the teeth 50 and 52, respectively, by a
a threaded stud ?xed at one end immovably to and pro
sliding interlocking connection between the stud and the
jecting from the said back side portion of the movable
forward end portion 64 of the leg 58. This sliding con
jaw, a locking nut freely slidably movable on the threaded
nection comprises a gmide pin 75 which has an outer 45 stud over and independently of the stud threads and‘an
threaded end portion 76 ‘and an inner smooth or run
threaded portion 78, which cooperates with a slot 80
‘formed in and longitudinally of the stud bolt or pin 44,
as best seen in‘ FIG. 3.
adjusting nut on and in threaded engagement with
the threaded stud and operatively engaging the locking
nut to impart sliding movement to the locking nut on
the stud relative to the said movable jaw portion when
As is shown in FIG. 3, the portion 64 of the leg 58 is 50 the. adjusting nut is rotated on the threaded stud, and
provided with a threaded bore 80 which receives the
means effecting a locking coupling between the locking
threadedrouter end 76 of the pin 75, whereby the inner
nut and the shank when the adjusting nut is turned in
end portion 78 of the guide pin is extended into the guide
one direction on the threaded stud.
slot 80 as shown.
2. The invention according to claim 1 wherein the last
, Since the guide slot 80 extends into the stud bolt 44 in 55 stated means ‘comprises interengaging elements carried
a direction perpendicular to the teeth of the lock nut and
by the shank and the locking nut.
those carried by the movable jaw and by the shank, the
3. As a new combination, a wrench structure having
pin 75 also is perpendicular to the teeth, andv accordingly,
a handle, a shank extending therefrom, a ?xed jaw on
while the lock nut is free to move back and forth or in
shank, a movable jaw slidable on the shank relative
wardly and outwardly relative to. the shank of the wrench 60 the
to the ?xed jaw, the shank having a back side and the
and the movable jaw, it will be prevented from turning
movablejaw having a back side, a threaded coupling
‘about the stud bolt 44.
between the movable jaw and the shank by which to
The teeth formed across the shank 16 of the wrench
adjust the ,movable jaw on the shank relative to the
and across the top or back of the movable jaw, and also
jaw, said shank having a plurality of teeth formed
the teeth carried by the lock'bolt, have been illustrated 65 ?xed
transversely of the back side thereof, tooth forming
as being substantially square or slightly tapered, whereby '
‘the interengagement between the teeth of the lock bolt
and the teeth carried by the wrench shank and movable
means extending transversely of and carried upon the
back side of the movable jaw, a threaded stud carried
other cross-sectional contour such, for example, as tri
in alignment with one another and said threaded stud
by the movable jaw and extending from and perpendicu
jaw may be easily, effected when the lock bolt is moved '
inwardly. However, it is, to be understood that the in 70 lar to the back side thereof, a substantially U-shaped
locking nut having two substantially parallel leg mem
vention is not limited to the use of teeth of this cross
bers and said 'leg members having openings therethrough
sectional form, since obviously, the teeth may have. an
extending through the said openings, an adjusting nut
It will be seen from the foregoing that with the present 75 disposed between the said legs of the locking nut and
threadably engaged on said threaded stud whereby rota
locking nut are disengaged from the tooth means of the
shank and the movable jaw.
References rCite-d in the ?le of this patent
tion of the ‘adjusting nut will e?ect movement of the
locking nut toward and away from the back side of the
shank and of the movable jaw, and tooth means car
ried by the leg of the locking nut nearest to the movable
jaw for engagement with the tooth means of the ‘shank
‘and the tooth means on the back side of the movable
jaw when the locking nut is moved by the adjusting
nut toward the shank and the movable jaw.
4. The invention according to claim 3, with intercon
necting means ‘between the looking nut and the threaded
Klatt ________________ __ Nov. 7, 1899
Sheldon ____________ __ Aug. 28, 1900
Boulanger ____________ __ July 14, 1903
Hammond et al. ______ __ May 30, 1905
Smith ______________ __ Nov. 14, 1916
Roberts _____________ ___. Sept. 20, 1921
Great Britain ________ __ Nov. 11, 1920
stud for maintaining the locking nut against rotation
around the threaded stud when the tooth means of the
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