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Sept. 10,
~~
R. E. GEARHART
‘
2,407,546
WRENCH
Filed June 7, 1943
3 Sheets-Sheet l
R,
Sept. ‘10, 19.46.
.
R. E. GEARHART
2,407,546 I
WRENCH
Filed June 7., 1945
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INVENTOR,
J? 2705/2.’ Gear/75rd
BY ‘pg/M4/7/0272;
‘
Patented Sept. 10, 1946
' *'
.
2,407,546
UNITED STATES PATENT OFFICE l‘
WRENCH
' Roy E. Gearhart, Kansas City, Mo., assignor of
three-tenths to Richard B. McCreary and
three-tenths to Byram L. McCreary, both of
Kansas City, Mo.
Application June 7, 1943, Serial No. 490,106
‘
2 Claims.
'
(01. 81-89)
.
1
2
t This invention relates to improvements in a
having jaws adapted to be forced toward each
Fig. 12 is an elevational View of a further
modi?cation of the wrench.
Fig. 13 is an edge view of the wrench shown in
other during the operation.
Fig. 12.
.
wrench and particular reference to a wrench
Fig. 14 is a longitudinal sectional view taken
Much difficulty has been experienced in ob
taim‘ng a wrench that will remove a hard set nut
and particularly a hexagon nut or screw without
.
" on line XIV-—XIV Of Fig. 13.
Fig. 15 is an enlarged cross sectional view
taken on line XV—XV of Fig. 12.
marring the nut or without slipping the wrench
Fig. 16 is a cross sectional view taken on line
on the nut to the discomfort of its operator.
‘
Many nuts and screws are plated and need to 10 XVI-XVI of Fig. 12.
Fig. 17 is a fragmentaryelevational view of
be carefully handled to prevent damaging.
the wrench showing a modi?ed form ofthe
The principal object of the present invention
angled jaws.
Throughout the several Views like reference
is to provide a‘wrench that will so engage a nut
or screw as to prevent relative movement of nut
and wrench jaws and at ‘the same time present 15 characters refer to similar parts and the numeral
smooth jaw surfaces against the nut thus pre
venting damage to the surface of the nut.
Another object of the present invention is the
provision of a wrench having ‘smooth angled jaws
each of which will simultaneously contact adja 20
i2 designates a shank or handle having ?xed
jaws I4 and I6 formed in a common head and
provided with angled nut engaging faces I8 and
20 respectively.
Slidably mounted on shank I 2'
is yoke or block 22 having complementary jaws
2,4 and 26 having nut engaging surfaces 28 and
30 respectively to coact with surfaces I8 and 20
cent sides of the nut.
A further object of the invention is a wrench
to engage a nut therebetween. It will be noted
adapted to be set to a size slightly larger than
that the jaws I6 and 26 are constructed to serve
the nut to be engaged and then to be moved to
clampingly engage the nut as the wrench is 25 as a socket wrench while'jaws I4 and 24 are
disposed at right angles thereto in the body of
manually moved by its handle to loosen or set
the head and the yoke.
V
said nut.
Other objects are simplicity and economy of
Yoke 22 is recessed at 3.2 to present side walls
34 between which is ?tted the inner end of a
construction, ease and efficiency of operation, and
adaptation for use on various sizes and shapes 30 lever 36. This lever is pivoted to the side walls
of nuts and screws.
‘
"
Reference will now be had to the drawings
‘ wherein:
Figure l is an elevational view of a wrench
embodying this invention.
Fig. 2 is an edge view of the wrench.
Fig. 3 is a sectional view taken on line III-I
of Fig. 2.
-
‘
34 by means of pivot 38, which is preferably
tightly anchored in said side walls by any suit
able means. A fulcrum :bar 40 having a series of
rack teeth 42 is secured for limited longitudinal
35 movement between walls 34 by means of pin 44
which is ?xed in the bar with its ends protruding
at each side to rest in slide slots 46 which are
disposed substantially parallel with the shank
I2‘. It will be noted that ratchet teeth 42 are
40 spaced longitudinally of the bar from the pin 44
so as to permit the hinging of the bar on the
Fig. 5 is a fragmentary edge view showing the
Fig. 4 is an enlarged sectional view taken on
line IV-IV of Fig. 1.
V _
socket jaws of the wrench.
s
“
Fig. 6 is a side elevation of a modi?ed form of
the wrench.
Fig. 7 is an edge view. of wrench shown in
Fig. 6.
pin to free teeth 42 from the rack bar teeth 48
formed on the inner face of shank I2 (see Fig
ures 3 and 8). Links 50 at each side of lever
45 36 are pivoted thereto by pivot 42 while their‘
other ends are connected by pivot 54 to the outer I
.
end of bar 40 so that when bar 40 is in the posi
tion shown in Fig. 1 the bar teeth 42 will en
IVIII—VI1I of Fig. '7.
gage the teeth in rack bar 48 to prevent relative
Fig. 9 is a cross sectional view taken on line 50 longitudinal movement of the bar and shank.
When so positioned the lever 36 may now be
IX-IX of Fig. 6.
Fig. 10 is a fragmentary elevational view of a
moved toward shank I2, and due to the angled
relation of pivots 38, 52 and 54 and the fact that
modi?ed form of the clamping jaws.
bar 40 is secured to shank I2, the yoke and asso
h i‘ Fig. .11‘ is an edge view of the jaws shown in
Fig. 8 is a sectional view taken on line
‘Fig- ‘10'.
‘
‘
55 ciated jaws will be moved toward the respective
2,407,646
3
4
?xed jaws to tighten the jaws against a nut N
erative relation a. U-shaped spring member 98
therebetween (see nut in dotted lines in Fig. 1).
A spring 56 secured by means 58 to lever 36
passes between links 58 and rests against bar 48
so that the bar will be urged against the shank I2
to maintain the anchoring teeth in proper
meshed relation during the operation of the
secured by screw 99 to bar 48 is adapted to en
gage in grooves I88 formed in the side wall of
the shank (see Figs. 6 and 9).
Figures 12, 13, 14, 15, and 16 illustrate a modi
?ed form of the wrench, suitable for use as a
one hand wrench, and. involving the principal
features of the preferred form.
wrench. By properly adjusting the pivots 38, 52,
and 54 any desired leverage may be obtained to
This wrench comprises a shank or handle I82
clamp the nut, furthermore the greater the 10 terminating in a head I84 having an angled jaw
pressure exerted on lever 36 the greater the pres
sure of the jaws against the nut.
When the wrench is set for operating a given
_
I86. Yoke I88 is slidably mounted on shank I82
and is recessed at II8 to receive the end portion
of lever II2 for limited pivotal movement on piv
size nut and the parts are positioned as shown ‘
ot II4. It willlbe noted that when the lever is
in Fig. 5 it is desirable to maintain the setting of ‘15. in the normalposition as shown the outer end
the wrench constant. This is accomplished by
portionII? ‘of the lever rests against the yoke
means of the detent 58 carried by lever 36 in
wall H8 to limit the movement of the lever away
recess 59 and urged by spring 68 "into a recess
from ‘handle I82. Interposed between handle
62 formed in the inner surface of wall ‘34, see
I82 and. lever II2 for longitudinal movement
Fig. 4. This detent will normally hold the 20 against handle I82 is a bar I28 having a reduced
proper setting of the wrench, however, by exert
end I22 which ?ts into a recess I24 formed in
ing an extra force on the lever the detent will
yoke I88. The outer extremity of bar LI28 is
move from recess 62 to recess 64 when the parts
notched at I26 to receive the worm’IZB mounted
will be in position to permit the movement of
for rotation on pin I38, and disposed ‘in .mesh
.yoke 22 on the shank for setting the jaws to ?t 25 with the rackteeth I32 formed on the inner- face
any. size nut within certain limits depending on
‘of shank I82, so that as the worm is rotated the
the length of rack 48.
bar will be adjusted lengthwise of the shank.
It will be noted that the nut engaging jaw
To maintain the bar I 28 in proper relation to the
surfaces are disposed at 120° to each other to
shank the bar is provided with overhanging de
engage the surfaces of a hexagon nut; however, v30 tents I34 which slidably engage grooves I36
this angle might be changed to ?t a square nut
formed in opposite sides of the shank.
or any other polygonal nut or any irregular nut.
Many advantages are obtained by using angled
Links I38 are connected by pivot I48 to: lever
H2 and to bar I28 by pivot I42. ‘It will be .ob
jaws, since more than two surfaces of the nut
served that pivots I I4, I48, and I 42 are not in a
will be contacted thereby eliminating to a large .35 straight line so that when the lever is moved to
degree the possibility of slipping the wrench on
ward the shank the jaw ‘I44 carried by yoke I88
the nut and at the same time preventing scuf?ng
will be moved toward jaw I86 to grip thenut po
of the nut surface. This wrench is especially
sitioned therebetween. A spring member I462se
adapted for use on plumbing ?xtures where it is
cured at itsone end by screw I48 to the lever
essential that the plated surfaces of the nuts be 40 rests against bar I 2.8 and tends to constantly purge
maintained in good form.
the lever to its extended position. The modi?ed form shown in. Figs; 10 and 11
p This wrench may be operatedv by one hand to
provides for a shank ‘I8 having a head ‘I2, and
adjust thejaws to ?t any given nut,‘ andtomove
yoke ‘I4 slidably mounted thereon and adapted
the nut to or from the set. position.
to be operated in like manner to .the parts shown . .45
The modi?ed form ofjawjshown in Figurelli'l '
in Figs. 1 to 5.
The novel feature of this form "
is the provision of nut engaging jaws ‘I8 and ‘I8
having respectively two transversely intersecting
provides for a planar jaw face‘ I48 formed on the
head of shank I82 and a planar jaw face I58 on
the yoke I88. These planar jaw faces arein par
angled grooves ,88 and 82 thus combining the
allel relation and are disposed at an angle .to a
jaws of, Fig. 1 inv one set. At 83 the nut engag .50 planar perpendicular to the longitudinal ‘axis of
ing walls ofthe jaws are slightly recessed to-per- >
the shank I82.
I
g
.mit adjustment of the wrench on the nut;
This wrench is suitable for moving transverse
The modi?ed form shown in Figures 6, 7, and
lyto position on the nut N without opening the
8 comprises a shank 84 having an o?set head
jaws any more than is accomplished by moving
92 provided with an angled jaw 94. By refer .55 the lever H2 to its extended position. ’
ring to Fig. '7 it will be noted that the shank is,
- From the foregoing it will be understood that
relatively thin and that the jaw 94 extends out
various alterations in the details of construction
wardly at each side thereof. Shank 84 is rela
and arrangement of parts may be ‘made ‘within
tively short and has a rack bar 48 on its inner
the scope of the invention herein disclosed and
wall. A block or yoke 9.8 is slidably mountedon 60 claimed.
' "
shank 84 and has a transversely vdisposed boss
What I claim is:
.
86 on which is mounted anyangled jaw88 com
l. A wrench comprising a ‘shank having a ?xed
plementing jaw 94.
v
jaw; a yoke slidably mounted on said s‘hanki'hav
Mounted in recess 96 between ‘walls 34 is :a
ing a jaw complementing said ?xed jaw and ‘hav
lever or handle 36 pivoted by means of pivot 65 ing side walls provided with slots disposed‘par
38 to said walls. A bar 48 is secured-for limited
allel with said shank; a rack bar formed in'the
longitudinal movement between walls 34 .by means
face of said shank; a fulcrum bar mounted for
‘of pin 44 which extend into 'slots'46 formed in
hinging and sliding movementin the slots of said
each of the side walls. This bar is ‘provided with
yolk; a relatively short series of teeth formed-on
ratchet teeth 42 which are adapted to mesh in 70 one face of said fulcrum bar and spacedapart
rack bar 48 of the shank and is interconnected
from the fulcrum point of said ‘bar and .adapted
to lever 36 by means of links 15.8. The spring 58
to mesh with the teeth .of said ‘rack ‘bar; .a ‘lever
secured to handle 36 tends ‘to urge ‘bar 48 ‘away
pivoted to said'yoke; a ‘link vpivotally intercon
from the lever and against the shank‘ 84.; To
necting said lever with thefree end of said ful
normally maintain the bar and‘shank in ?xed op~ 7 5 crum bar whereby as said lever is moved toward
2,407,646
5
6
said shank the fulcrum bar is urged toward said
shank and said yoke is urged toward said ?xed
the slotted side walls of said yoke; and having
teeth adapted to mesh with said rack bar teeth;
a lever pivoted to said yoke; links pivotally in
terconnecting said lever with said fulcrum bar
Jaw.
\ I
2. A wrench comprising a shank having a ?xed
jaw; a yoke having slotted side walls slidably
mounted on said shank and having a jaw com
plementing said ?xed jaw; a rack bar formed in
the face of said shank; a fulcrum bar mounted at
its one end for pivotal and sliding movement in
whereby as said lever is moved toward said shank
the said fulcrum bar will be urged toward said
shank; and a spring interposed between said lever
and fulcrum bar to normally urge them apart.
ROY E. GEARHART.
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