CA1051696A - Adjustable gripping tool - Google Patents
Adjustable gripping toolInfo
- Publication number
- CA1051696A CA1051696A CA254,415A CA254415A CA1051696A CA 1051696 A CA1051696 A CA 1051696A CA 254415 A CA254415 A CA 254415A CA 1051696 A CA1051696 A CA 1051696A
- Authority
- CA
- Canada
- Prior art keywords
- jaw
- face
- wrench
- adjustable
- faces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/10—Spanners; Wrenches with adjustable jaws
- B25B13/12—Spanners; Wrenches with adjustable jaws the jaws being slidable
- B25B13/14—Spanners; Wrenches with adjustable jaws the jaws being slidable by rack and pinion, worm or gear
Abstract
ABSTRACT OF THE DISCLOSURE
An adjustable wrench which will exert a pressure on at least four torque pressure points on a work object having sides instead of on only two torque pressure points which are available with conventional adjustable wrenches. The wrench comprises a longitudinally extended body having a fixed jaw at one end, a handle at the other end, and an adjustable jaw that is slidably disposed along the body for gripping the object between the jaws.
Each jaw is shaped to include an inner and an outer face adapted to contact a pair of adjacent sides of the object. The faces are unequal in length with the longer of the two faces being adapted to completely span and engage one side of the object, the shorter face being adapted to contact at least a portion of the adjacent side of the object and the corresponding faces of both jaws being disposed in opposed parallel relation. In a preferred embodiment, a fifth torque pressure point provided by a portion of either the fixed or movable jaw becomes available for applying pressure to a further torque pressure point on the object when the jaws are set at their maximum opening. The length ratio of the shorter and longer jaw faces occurs as 1:2, respectively, but may be altered to provide a reach in feature to grip a pair of opposite sides of an object which is only partly accessible.
An adjustable wrench which will exert a pressure on at least four torque pressure points on a work object having sides instead of on only two torque pressure points which are available with conventional adjustable wrenches. The wrench comprises a longitudinally extended body having a fixed jaw at one end, a handle at the other end, and an adjustable jaw that is slidably disposed along the body for gripping the object between the jaws.
Each jaw is shaped to include an inner and an outer face adapted to contact a pair of adjacent sides of the object. The faces are unequal in length with the longer of the two faces being adapted to completely span and engage one side of the object, the shorter face being adapted to contact at least a portion of the adjacent side of the object and the corresponding faces of both jaws being disposed in opposed parallel relation. In a preferred embodiment, a fifth torque pressure point provided by a portion of either the fixed or movable jaw becomes available for applying pressure to a further torque pressure point on the object when the jaws are set at their maximum opening. The length ratio of the shorter and longer jaw faces occurs as 1:2, respectively, but may be altered to provide a reach in feature to grip a pair of opposite sides of an object which is only partly accessible.
Description
s~
This invention relates to an adjustable gripping tool and more particularly to an adjustable gripping tool capable of exerting pressure on a plurality of torque pressure points on a work object having sides.
Adjustable gripping tools or wrenches having a fixed jaw and an adjustable jaw are well known. Generally, each jaw is provided with aflat contacting surface, the surfaces of both jaws co-acting to engage opposite parallel sides of a work object such as a fastener comprising a hexagonal nut or bolt head. Only two torque pressure points may be obtained using this form of wrench which presents a problem when an attempt is made to release a fastener that may be frozen by rust. A common tendency in such wrenches is for the jaws to slightly spring apart as torque is increased. As a result, in situations where excessive torque pressure is required, the spring-open tendency of the jaws tends to round the corners of the fastener.
To overcome the problems of the foregoing prior art adjustable wrenches, adjustable wrench designs have appeared in which as many as four or five fastener contacting surfaces have been provided. In general, the flat gripping surfaces of a simple prior art adjustable wrench are formed into two V-shaped surfaces which define and include an angle of 120. This angle corres-ponds to the angle between adjacent surfaces of a hexagonal fastener and is an industry standard.
Characterizing examples of the prior art may be seen in U.S. patent 54,040, Symonds, an old patent issued in 1866, and 3,015,246, Buyer, which by comparison is relatively recent, having issued in 1962. While the prior art on adjustable wrenches is relatively extensive, the Symonds and Buyer patents typify the limits in time during which patents on adjustable wrenches have issued as well as the extent of inventive ideas resorted to in an effort to overcome the deficiencies of the simple two torque point wrench.
::
. ~
~5J~
According to the Symonds patent an adjustable wrench is disclosed having the capability of exerting pressure on as many as five torque pressure points on a hexagonal fastener. It is noted, however, that Symonds has not entirely escaped the problems of the aforementioned simple adjustable wrenches for the reason that the two contacting surfaces of the fixed jaw in Symonds wrench are relatively short in length and may, under high torque pressures, spring outwardly to round the corner of a fastener in like manner to the simple adjustable wrench having two torque points. Presumably, the Symonds wrench was designed in this manner to accommodate a wide range of fastener sizes. It is apparent that where all jaw surfaces are equal in length, the jaws may not approach as closely together. By making the contacting ~;
surfaces of the upper jaw shorter than corresponding surfaces in the lower jaw, both jaws may be drawn more closely together to accommodate fasteners of small size.
In the Buyer patent it is recogni~ed that the jaws of an adjustable wrench must engage corresponding surfaces of a fastener -so as to completely span two adjacent sides in order to provide a resultant grip that is firm and which distributes the turning -forces over a larger area of the fastener. To this end, the wrench disclosed by Buyer is provided with a hook jaw having a `
V-shaped fastener engaging surface and a heel jaw having only one surface which operates as a fulcrum. Thus, Buyer discloses an adjustable wrench having only three contacting surfaces for fasteners of all sizes. A fourth contacting surface in the heel jaw is eliminated in order to gain the advantage of easy access to a fastener without having to excessively open the jaws of the ;~
wrench. In one embodiment disclosed by Buyer, a fourth jaw surface becomes available when the wrench is opened to its maximum. For general applications, howeYer, the Buyer wrench engages only three surfaces of a fastener and thus exerts pressure at only
This invention relates to an adjustable gripping tool and more particularly to an adjustable gripping tool capable of exerting pressure on a plurality of torque pressure points on a work object having sides.
Adjustable gripping tools or wrenches having a fixed jaw and an adjustable jaw are well known. Generally, each jaw is provided with aflat contacting surface, the surfaces of both jaws co-acting to engage opposite parallel sides of a work object such as a fastener comprising a hexagonal nut or bolt head. Only two torque pressure points may be obtained using this form of wrench which presents a problem when an attempt is made to release a fastener that may be frozen by rust. A common tendency in such wrenches is for the jaws to slightly spring apart as torque is increased. As a result, in situations where excessive torque pressure is required, the spring-open tendency of the jaws tends to round the corners of the fastener.
To overcome the problems of the foregoing prior art adjustable wrenches, adjustable wrench designs have appeared in which as many as four or five fastener contacting surfaces have been provided. In general, the flat gripping surfaces of a simple prior art adjustable wrench are formed into two V-shaped surfaces which define and include an angle of 120. This angle corres-ponds to the angle between adjacent surfaces of a hexagonal fastener and is an industry standard.
Characterizing examples of the prior art may be seen in U.S. patent 54,040, Symonds, an old patent issued in 1866, and 3,015,246, Buyer, which by comparison is relatively recent, having issued in 1962. While the prior art on adjustable wrenches is relatively extensive, the Symonds and Buyer patents typify the limits in time during which patents on adjustable wrenches have issued as well as the extent of inventive ideas resorted to in an effort to overcome the deficiencies of the simple two torque point wrench.
::
. ~
~5J~
According to the Symonds patent an adjustable wrench is disclosed having the capability of exerting pressure on as many as five torque pressure points on a hexagonal fastener. It is noted, however, that Symonds has not entirely escaped the problems of the aforementioned simple adjustable wrenches for the reason that the two contacting surfaces of the fixed jaw in Symonds wrench are relatively short in length and may, under high torque pressures, spring outwardly to round the corner of a fastener in like manner to the simple adjustable wrench having two torque points. Presumably, the Symonds wrench was designed in this manner to accommodate a wide range of fastener sizes. It is apparent that where all jaw surfaces are equal in length, the jaws may not approach as closely together. By making the contacting ~;
surfaces of the upper jaw shorter than corresponding surfaces in the lower jaw, both jaws may be drawn more closely together to accommodate fasteners of small size.
In the Buyer patent it is recogni~ed that the jaws of an adjustable wrench must engage corresponding surfaces of a fastener -so as to completely span two adjacent sides in order to provide a resultant grip that is firm and which distributes the turning -forces over a larger area of the fastener. To this end, the wrench disclosed by Buyer is provided with a hook jaw having a `
V-shaped fastener engaging surface and a heel jaw having only one surface which operates as a fulcrum. Thus, Buyer discloses an adjustable wrench having only three contacting surfaces for fasteners of all sizes. A fourth contacting surface in the heel jaw is eliminated in order to gain the advantage of easy access to a fastener without having to excessively open the jaws of the ;~
wrench. In one embodiment disclosed by Buyer, a fourth jaw surface becomes available when the wrench is opened to its maximum. For general applications, howeYer, the Buyer wrench engages only three surfaces of a fastener and thus exerts pressure at only
-2-.
~s~
three torque pressure points. It would appear that Buyer was drawn to this structure in order to have two faces of equal length in the hook jaw so as to completely span two adjacent sides of the fastener. By removing the one surface of the heel jaw,easy access to the fastener is obtained and both jaws may be brought more closely together to accommodate a wide range of fastener sizes. This advantage, however, was gained at the expense of losing one torque pressure point.
An object of the present invention is to provide an adjustable wrench which will exert pressure on at least four torque pressure points on a work object such as a fastener.
Another object of this invention is to provide an adjustable wrench which does not require fully opening the jaws each time a new grip is taken on a fastener after the fastener has been started by a portion of the wrench capable of exerting pressure on at least four torque pressure points.
A still further object of the invention is to provide an adjustable wrench having at least two fastener contacting surfaces which are sufficiently large to completely span and engage two opposite sides of a fastener in order to distribute the turning forces over a larger area.
It is a still further object of the invention to provide an adjustable wrench in which the opposing jaws may he closely brought together in order to accommodate a wide range of fastener sizes.
The foregoing disadvantages of the prior art may be substantially overcome and the preceding objectives achieved by recourse to the present invention which is an adjustable wrench for exerting pressure at a plurality of torque pressure points on a work object having sides. The wrench comprises a longitudinally extended body having a fixed jaw at one end, a handle at the other end and an adjustable jaw which is slidably disposed along a portion ~s~9~
of the body for gripping the object between the jaws. Each jaw has an inner and an outer face adapted to contact a pair of adjacent sides of the object. The faces are unequal in length with the longer face adapted to completely span and engage one side of the object; the shorter face adapted to contact at least a portion of the adjacent side of the object and the jaw faces corresponding in length being disposed in opposing parallel relation. An adjustment means cooperating with the body and the adjustable jaw is provided for locating the adjustable jaw on the body in a predetermined fixedposition.
The invention will now be more particularly described ~. . ....
with reference to embodiments thereof shown, by way of example, in the accompanying drawings wherein:
Fig. 1 is a perspective view of an adjustable wrench in accordance with the invention and is shown gripping a large hexagonal fastener;
Fig. 2 is a plan view of another embodiment of the invention;
Fig. 3 is a plan view of still another embodiment of the invention; and Fig. 4 is a side view of the wrench of Fig. 1.
In Fig. 1, there is shown an adjustable wrench 10 that is particularly adapted to exert a pressure on at least four torque pressure points on a work object having sides. The work object is shown as a hexagonal nut 11. It should be noted that the nut 11 may comprise a conventional nut or abQltheador some other object such as a hexagonal bar orother suchpolygonal object. The wrench 10 includes a longitudinally extendedbody 12 having a fixed jaw 13at oneend and a handle portion 14 at the 30 other end. An adjustable jaw 15 is slidably disposed along the ~
body 12 for gripping the fastener llbetween the jaws13and 15. ~-Each jaw is provided with a longer face 16 and a shorter face 17.
~, ~
,~ .
-, , ~ , ,, , :
- - , . . : . . .
. . , . :
;`~ '. ' ' ' . .
~.0~
Thelonger and shor~ faces are adapted to contact a pair of corresponding adjacent sides on the nut 11. As may be seen in Fig. 1, two pairs of oppositely disposed parallel sides of the nut 11 are gripped by corresponding pairs of longer and shorter faces 16 and 17, respectively. The faces 16 and 17 of the jaws are unequal in length with each longer face being adapted to completely span and engage one side of the nut 11. Although ~ch shorter face is adapted to contact only a portion of the side adjacent to the side of the nut 11 which is engaged by the longer face, the portion that it does contact is adequate for exerting a torque pressure. However, the longer faces are more effective for exerting torque pressures since they completely span opposite sides of the fastener and thus distribute the tor~ue load over a greater area.
It has been determined that a good practical ratio of jaw face lengths exists which permits bringing together the jaws 13 and 15 in sufficiently close relation to handle a wide range of fastener sizes. The ratio of the effective lengths of the jaw faces 16 and 17 in Figs. 1 and 3 is 2:1.
Whereas each jaw 13 and 15 has been described as including an inner and an outer face comprising a long face and a short face, the fixed jaw 13 also includes an additional jaw face 20.
The jaw faces 16 and 17 form an included angle of 120 and are work-engaging surfaces. The face 20 in the fixed jaw 13 is not normally used as a work-engaging surface in the embodiments of Figs. 1 and 3. However, a further embodiment of this invention does use the face 20 as a work-engaging surface as will be later described. In the embodiments of Figs. 1 to 3, the face 20 angles away from the face 17 of the jaw 13 in order to contact the work-engaging outersurface, shown as the longer face 16, of the adjustable jaw 15. In this way, the jaws may be brought together sufficiently close so as to enable handling a wide range of fastener sizes.
. . .
. . .
It will be apparent from the foregoing description that in the embodiments of Figs. 1 to 3, the angle between the faces 16 and 17 of each jaw corresponds to the angle between adjacent corresponding surfaces of the nut 11. The overall result of the embodiments is to provide an adjustable wrench which will develop pressures on at least four torque pressure points on the nut 11.
When the jaws are at a maximum opening, as illustrated in Fig. 1, a fifth torque pressure point becomes available. This arises from a fifth jaw face 21 which forms a surface portion of the fixed jaw 13 that is adjacent to the longer face 16 thereof. As shown, the fifth face 21 engages a corresponding fifth side of the nut 11 when the jaws are spaced apart a predetermined distance.
Two faces of the four faces on the jaws 13 and 15 fully contact corresponding faces of the nut 11. This feature allows a good grip on the flat portions thereof. The end portions 20 and 20' of the wrench jaws 13 and 15 are cut away at an angle which corresponds to the two long faces 16 which completely span corresponding surfaces of the nut 11. In this way, the wrench jaws are permitted to closely approach one another so as to accommodate fasteners of small size.
The two long faces 16 which fully span and contact two faces of the nut 11 are disposed in opposed parallel relation.
This allows the application of maximum torque while reducing the tendency to damage the nut 11 by rounding the corners. If the two long faces 16 are placed in adjacent relation, as taught in the prior art, the two short faces 17, which would then be in opposing relation, contact a relatively small area of the nut 11 so that the corners of the fastener are more easily `
damaged. This situation may readily occur in high torque application-s where the wrench jaws tend to spring open a little.
- A wrench jaw having a small gripping area would therefore tend to slip and round off a gripped corner. ~owever, since the two long -- , , , . : ~ . . . -.
, : .
. , . ., :.
~ .;: . .. .. . .
`` 3L~9S~ 6 faces 16 are in opposing relation, there is a substantially reduced tendency for an adjacent pair of faces 16 and 17 in either jaw 13 or 15 to slide over a corner of the nut 11.
Adjustment means are provided for locating the adjustable jaw 15 on the body 12 in a predetermined fixed position so as to adequately grip the work surfaces of the nut 11. This is clearly shown in the figures. The adjustment means is well known in the art of adjustable wrenches and includes a knurled worm gear 22 which engages a corresponding linear gear 23 that forms a portion of the jaw 15. The gear 23 and the jaw 15 are joined by a web 26 portion of the jaw. In accordance with common knowledge in the art, the gear 23 and web 26 slidably engage a guideway 24 in the body 12 so that the position of the jaw 15 relative to the jaw 13 will be held fixed at any setting of the gear 22. These structural features are readily apparent in the side view of Fig. 4 which also shows a screw 25 that holds the gear 22 in rotatable relation with the gear 23.
Fig. 2 is similar to Fig. 1, with the jaws 13 and 15 shown in an open position to accommodate a large nut 11. The embodiment of Fig. 2 shows a somewhat longer face 16 in the adjustable jaw 15 as well as a somewhat longer end portion 20 in the fixed jaw 13.
The purpose of these modifications is to permit gripping a fastener by the surfaces 16 and 20 in order to reach into tight corners or restricted areas to turn the nut 11 after the nut has been started by means of full engagement with the surfaces 16 and 17 of the fixed and adjustable jaws 13 and 15~ respectively.
Whereas the embodiment of the invention illustrated in Fig. 1 indicates that the fifth jaw face 21 is located on a portion of the fixed jaw 13, it would be apparent to a workman skilled in the art to modify the wrench shown so that the jaw face 21 is disposed on the adjustable jaw 15.
Fig. 3 illustrates a further embodiment of the invention ~7~
~ . .
:
~ ~ ' . . :
, 1. . " ~ : I
~516~6 wherein the fifth jaw face 21 is formed by the web 26 of the movable jaw 15 instead of a portion of the fixed jaw 13. Aside from this particular characterizing feature, the wrench functions in substantially the same manner as the embodiments illustrated in the other flgures.
''':
' : ' '
~s~
three torque pressure points. It would appear that Buyer was drawn to this structure in order to have two faces of equal length in the hook jaw so as to completely span two adjacent sides of the fastener. By removing the one surface of the heel jaw,easy access to the fastener is obtained and both jaws may be brought more closely together to accommodate a wide range of fastener sizes. This advantage, however, was gained at the expense of losing one torque pressure point.
An object of the present invention is to provide an adjustable wrench which will exert pressure on at least four torque pressure points on a work object such as a fastener.
Another object of this invention is to provide an adjustable wrench which does not require fully opening the jaws each time a new grip is taken on a fastener after the fastener has been started by a portion of the wrench capable of exerting pressure on at least four torque pressure points.
A still further object of the invention is to provide an adjustable wrench having at least two fastener contacting surfaces which are sufficiently large to completely span and engage two opposite sides of a fastener in order to distribute the turning forces over a larger area.
It is a still further object of the invention to provide an adjustable wrench in which the opposing jaws may he closely brought together in order to accommodate a wide range of fastener sizes.
The foregoing disadvantages of the prior art may be substantially overcome and the preceding objectives achieved by recourse to the present invention which is an adjustable wrench for exerting pressure at a plurality of torque pressure points on a work object having sides. The wrench comprises a longitudinally extended body having a fixed jaw at one end, a handle at the other end and an adjustable jaw which is slidably disposed along a portion ~s~9~
of the body for gripping the object between the jaws. Each jaw has an inner and an outer face adapted to contact a pair of adjacent sides of the object. The faces are unequal in length with the longer face adapted to completely span and engage one side of the object; the shorter face adapted to contact at least a portion of the adjacent side of the object and the jaw faces corresponding in length being disposed in opposing parallel relation. An adjustment means cooperating with the body and the adjustable jaw is provided for locating the adjustable jaw on the body in a predetermined fixedposition.
The invention will now be more particularly described ~. . ....
with reference to embodiments thereof shown, by way of example, in the accompanying drawings wherein:
Fig. 1 is a perspective view of an adjustable wrench in accordance with the invention and is shown gripping a large hexagonal fastener;
Fig. 2 is a plan view of another embodiment of the invention;
Fig. 3 is a plan view of still another embodiment of the invention; and Fig. 4 is a side view of the wrench of Fig. 1.
In Fig. 1, there is shown an adjustable wrench 10 that is particularly adapted to exert a pressure on at least four torque pressure points on a work object having sides. The work object is shown as a hexagonal nut 11. It should be noted that the nut 11 may comprise a conventional nut or abQltheador some other object such as a hexagonal bar orother suchpolygonal object. The wrench 10 includes a longitudinally extendedbody 12 having a fixed jaw 13at oneend and a handle portion 14 at the 30 other end. An adjustable jaw 15 is slidably disposed along the ~
body 12 for gripping the fastener llbetween the jaws13and 15. ~-Each jaw is provided with a longer face 16 and a shorter face 17.
~, ~
,~ .
-, , ~ , ,, , :
- - , . . : . . .
. . , . :
;`~ '. ' ' ' . .
~.0~
Thelonger and shor~ faces are adapted to contact a pair of corresponding adjacent sides on the nut 11. As may be seen in Fig. 1, two pairs of oppositely disposed parallel sides of the nut 11 are gripped by corresponding pairs of longer and shorter faces 16 and 17, respectively. The faces 16 and 17 of the jaws are unequal in length with each longer face being adapted to completely span and engage one side of the nut 11. Although ~ch shorter face is adapted to contact only a portion of the side adjacent to the side of the nut 11 which is engaged by the longer face, the portion that it does contact is adequate for exerting a torque pressure. However, the longer faces are more effective for exerting torque pressures since they completely span opposite sides of the fastener and thus distribute the tor~ue load over a greater area.
It has been determined that a good practical ratio of jaw face lengths exists which permits bringing together the jaws 13 and 15 in sufficiently close relation to handle a wide range of fastener sizes. The ratio of the effective lengths of the jaw faces 16 and 17 in Figs. 1 and 3 is 2:1.
Whereas each jaw 13 and 15 has been described as including an inner and an outer face comprising a long face and a short face, the fixed jaw 13 also includes an additional jaw face 20.
The jaw faces 16 and 17 form an included angle of 120 and are work-engaging surfaces. The face 20 in the fixed jaw 13 is not normally used as a work-engaging surface in the embodiments of Figs. 1 and 3. However, a further embodiment of this invention does use the face 20 as a work-engaging surface as will be later described. In the embodiments of Figs. 1 to 3, the face 20 angles away from the face 17 of the jaw 13 in order to contact the work-engaging outersurface, shown as the longer face 16, of the adjustable jaw 15. In this way, the jaws may be brought together sufficiently close so as to enable handling a wide range of fastener sizes.
. . .
. . .
It will be apparent from the foregoing description that in the embodiments of Figs. 1 to 3, the angle between the faces 16 and 17 of each jaw corresponds to the angle between adjacent corresponding surfaces of the nut 11. The overall result of the embodiments is to provide an adjustable wrench which will develop pressures on at least four torque pressure points on the nut 11.
When the jaws are at a maximum opening, as illustrated in Fig. 1, a fifth torque pressure point becomes available. This arises from a fifth jaw face 21 which forms a surface portion of the fixed jaw 13 that is adjacent to the longer face 16 thereof. As shown, the fifth face 21 engages a corresponding fifth side of the nut 11 when the jaws are spaced apart a predetermined distance.
Two faces of the four faces on the jaws 13 and 15 fully contact corresponding faces of the nut 11. This feature allows a good grip on the flat portions thereof. The end portions 20 and 20' of the wrench jaws 13 and 15 are cut away at an angle which corresponds to the two long faces 16 which completely span corresponding surfaces of the nut 11. In this way, the wrench jaws are permitted to closely approach one another so as to accommodate fasteners of small size.
The two long faces 16 which fully span and contact two faces of the nut 11 are disposed in opposed parallel relation.
This allows the application of maximum torque while reducing the tendency to damage the nut 11 by rounding the corners. If the two long faces 16 are placed in adjacent relation, as taught in the prior art, the two short faces 17, which would then be in opposing relation, contact a relatively small area of the nut 11 so that the corners of the fastener are more easily `
damaged. This situation may readily occur in high torque application-s where the wrench jaws tend to spring open a little.
- A wrench jaw having a small gripping area would therefore tend to slip and round off a gripped corner. ~owever, since the two long -- , , , . : ~ . . . -.
, : .
. , . ., :.
~ .;: . .. .. . .
`` 3L~9S~ 6 faces 16 are in opposing relation, there is a substantially reduced tendency for an adjacent pair of faces 16 and 17 in either jaw 13 or 15 to slide over a corner of the nut 11.
Adjustment means are provided for locating the adjustable jaw 15 on the body 12 in a predetermined fixed position so as to adequately grip the work surfaces of the nut 11. This is clearly shown in the figures. The adjustment means is well known in the art of adjustable wrenches and includes a knurled worm gear 22 which engages a corresponding linear gear 23 that forms a portion of the jaw 15. The gear 23 and the jaw 15 are joined by a web 26 portion of the jaw. In accordance with common knowledge in the art, the gear 23 and web 26 slidably engage a guideway 24 in the body 12 so that the position of the jaw 15 relative to the jaw 13 will be held fixed at any setting of the gear 22. These structural features are readily apparent in the side view of Fig. 4 which also shows a screw 25 that holds the gear 22 in rotatable relation with the gear 23.
Fig. 2 is similar to Fig. 1, with the jaws 13 and 15 shown in an open position to accommodate a large nut 11. The embodiment of Fig. 2 shows a somewhat longer face 16 in the adjustable jaw 15 as well as a somewhat longer end portion 20 in the fixed jaw 13.
The purpose of these modifications is to permit gripping a fastener by the surfaces 16 and 20 in order to reach into tight corners or restricted areas to turn the nut 11 after the nut has been started by means of full engagement with the surfaces 16 and 17 of the fixed and adjustable jaws 13 and 15~ respectively.
Whereas the embodiment of the invention illustrated in Fig. 1 indicates that the fifth jaw face 21 is located on a portion of the fixed jaw 13, it would be apparent to a workman skilled in the art to modify the wrench shown so that the jaw face 21 is disposed on the adjustable jaw 15.
Fig. 3 illustrates a further embodiment of the invention ~7~
~ . .
:
~ ~ ' . . :
, 1. . " ~ : I
~516~6 wherein the fifth jaw face 21 is formed by the web 26 of the movable jaw 15 instead of a portion of the fixed jaw 13. Aside from this particular characterizing feature, the wrench functions in substantially the same manner as the embodiments illustrated in the other flgures.
''':
' : ' '
Claims (8)
EXCLUSIVE PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS
FOLLOWS:
1. An adjustable wrench for exerting pressure at a plurality of torque pressure points on a work object having sides, comprising:
a longitudinally extended body having a fixed jaw at one end, a handle at the other end, and an adjustable jaw slidably disposed along a portion of the body for gripping the object between the jaws, each jaw having an inner and an outer face adapted to contact a pair of adjacent sides of the object, the faces being unequal in length with the longer face adapted to completely span and engage one side of the object, the shorter face adapted to contact at least a portion of the adjacent side and the jaw faces corresponding in length being disposed in opposing parallel relation;
a fifth jaw face intermediate said jaws for applying a further torque pressure point on the object, the fifth jaw face forming a surface portion on one of, the fixed jaw and adjustable jaw adjacent the respective inner face thereof and adapted to engage a fifth side of the object when the jaws are spaced apart a predetermined distance; and adjustment means cooperating with said body and the adjustable jaw for locating the adjustable jaw on said body in a predetermined fixed position.
a longitudinally extended body having a fixed jaw at one end, a handle at the other end, and an adjustable jaw slidably disposed along a portion of the body for gripping the object between the jaws, each jaw having an inner and an outer face adapted to contact a pair of adjacent sides of the object, the faces being unequal in length with the longer face adapted to completely span and engage one side of the object, the shorter face adapted to contact at least a portion of the adjacent side and the jaw faces corresponding in length being disposed in opposing parallel relation;
a fifth jaw face intermediate said jaws for applying a further torque pressure point on the object, the fifth jaw face forming a surface portion on one of, the fixed jaw and adjustable jaw adjacent the respective inner face thereof and adapted to engage a fifth side of the object when the jaws are spaced apart a predetermined distance; and adjustment means cooperating with said body and the adjustable jaw for locating the adjustable jaw on said body in a predetermined fixed position.
2. A wrench as claimed in Claim 1 wherein the inner face of the fixed jaw is the longer face and the free end of the fixed jaw comprises a flat surface that angles away from the shorter face of said fixed jaw to permit said jaws to be brought more closely together to accommodate a wide range of work object sizes.
3. A wrench as claimed in Claim 4 wherein the jaw faces are flat.
4. A wrench as claimed in Claim 3, wherein each pair of inner and outer jaw faces meet to form an enclosed angle of 120° and the fifth jaw face and each inner face meet to form an enclosed angle of 120°.
5. A wrench as claimed in Claim 4, further compris-ing a sixth jaw face co-operable with the free end portion of the outer face of the adjustable jaw for exerting pressure on two torque pressure points on a pair of oppositely disposed parallel sides of the work object, the sixth jaw face com-prising the flat surface on the free end of the fixed jaw and being disposed in parallel relation with the outer face of the adjustable jaw.
6. A wrench as claimed in Claim 5, wherein the shorter and longer jaw faces have a length ratio of 1:2, respectively.
7. A wrench as claimed in Claim 6, wherein the fifth jaw face comprises a surface portion of the fixed jaw.
8. A wrench as claimed in Claim 6, wherein the fifth jaw comprises a surface portion of the adjustable jaw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA254,415A CA1051696A (en) | 1976-06-09 | 1976-06-09 | Adjustable gripping tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA254,415A CA1051696A (en) | 1976-06-09 | 1976-06-09 | Adjustable gripping tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1051696A true CA1051696A (en) | 1979-04-03 |
Family
ID=4106174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA254,415A Expired CA1051696A (en) | 1976-06-09 | 1976-06-09 | Adjustable gripping tool |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1051696A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2891542A1 (en) * | 2014-01-06 | 2015-07-08 | New Way Tools Co., Ltd. | Adjustable wrench with reinforced slidable jaw |
| CN104760011A (en) * | 2014-01-08 | 2015-07-08 | 志拓有限公司 | Adjustable wrench with strengthening movable jaw |
-
1976
- 1976-06-09 CA CA254,415A patent/CA1051696A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2891542A1 (en) * | 2014-01-06 | 2015-07-08 | New Way Tools Co., Ltd. | Adjustable wrench with reinforced slidable jaw |
| CN104760011A (en) * | 2014-01-08 | 2015-07-08 | 志拓有限公司 | Adjustable wrench with strengthening movable jaw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3424039A (en) | Adjustable inserted wrench combination tool including link means having plural openings | |
| US5176049A (en) | Compound leverage gripping tool with constantly parallel jaws | |
| US5551322A (en) | Speed wrench | |
| KR970003495B1 (en) | Open-end wrench with reduced size jaws | |
| US3850057A (en) | Combination torqueing and ratcheting wrench | |
| US3808870A (en) | Pipe crimping attachment | |
| US5644960A (en) | Adjustable locking wrench | |
| CA1295346C (en) | Wrenchable c-clamp | |
| US5535647A (en) | Friction clutch wrench | |
| US3309949A (en) | Snap-on type ratcheting flare-nut wrench | |
| US3165015A (en) | Wrench | |
| US4622870A (en) | Open-end ratchet-like wrench with releasable locking head | |
| WO1998028109A3 (en) | Indexable jaw universal vise | |
| AU2016210604A1 (en) | Tool for applying torque | |
| US3247742A (en) | Article gripping tool including pyramidal gripping elements | |
| US5671644A (en) | Open-ended ratcheting wrench | |
| CA1051696A (en) | Adjustable gripping tool | |
| CA1051231A (en) | Adjustable wrench for torqueing and ratcheting a symmetrical polygon member | |
| EP0580177A1 (en) | Speed wrench | |
| US2563267A (en) | Wrench jaws | |
| US4802389A (en) | Adjustable workpiece gripping and rotating device | |
| US4603605A (en) | Thread vise | |
| US3280669A (en) | Sliding side jaw wrench having a ratchet bottom and shoulder stop means on a jaw | |
| US3336825A (en) | Pivoted tool having a wedge-shaped jaw portion for engaging a tie rod sleeve | |
| US4534245A (en) | Tight-grip wrench |