Abstract: An Adjustable wrench including a main body, a slide block, a movable jaw and a grip. The main body has a jaw section and a hollow section in which the slide block and the movable jaw are disposed. The grip is pivotally connected with the hollow section. The slide block has a projecting section slidably inserted in the slide channels of the main body. A top face of the projecting section is formed with a semicircular groove. A lower portion of the movable jaw is a projecting rail complementary to the slide channels of the main body. A bottom face of the projecting rail is formed with a concave face cooperating with the semicircular groove of the slide block. The concave face is formed with a thread. The projecting rail of the movable jaw and the projecting section of the slide block are together inlaid in the slide channels of the main body.

Abstract: A crescent wrench having a screw hole at its handle in front of a thumbscrew, a holding-down screw threaded into the screw hole, and a handle couped to the holding-down screw and adapted for turning the holding-down screw between the operative position to hold down a movable jaw, which is to be turned by the thumbscrew relative to a fixed jaw at one end of the handle, and the non-operative position to release the movable jaw.

Abstract: The present invention is directed to an adjustable wrench that permits quick and effortless speed slip adjustment and locked positioning.

Abstract: A adjustable hinge adjustment tool for adjusting variable sized hinges. The adjustable hinge adjustment tool includes a handle portion and a wrench head portion. The handle portion is an elongate member having a distal end and a proximal end. The proximal end is fixedly coupled to the head portion. The head portion comprises a first portion and a second portion. The first portion is fixedly coupled to the proximal end of the handle portion. A notch is in the first portion of the head portion. The second portion of the wrench comprises a base, a fixed jaw and a movable jaw. The base is fixedly coupled to the first portion of the head portion. The fixed jaw is fixedly coupled to the base. A guide slot in the base defines a track for the movable jaw. The guide slot extends into the notch. The movable jaw has a bottom member adapted to be inserted into the guide slot. The bottom member has V-shaped recesses therein. A drive worm screw is rotatably mounted in the notch.

Abstract: Monkey wrench, of the type built up of a fixed clamp (1) solidary with the grip and a mobile jaw (2) provided with a rack (3) in which an operation shaft (5) is engaged, and in which the drive nut (4) is disposed on a shaft (5) built up of a flexible elastomer material, remaining the mentioned shaft (5) configured by a compact cylindrical body with a diameter in correspondence with the respective installation housing (6); and because in the assembly disposition of the mentioned shaft (5) it remains slightly deflected, exercising a pushing of the nut (4) towards the rack (3) of the mobile jaw (2), with the possibility to separate the mentioned nut (4) regarding the mentioned rack (3) of the mobile jaw (2), by forced displacement of the nut (4) against the action of the indicated shaft (5).

Abstract: An adjustable wrench includes a handle, a head connected to the handle and including a fixed jaw formed thereon and a movable jaw mounted thereon, an adjusting screw rotatably mounted in a web area between the handle and the head for moving the movable jaw relative to the fixed jaw, and a clearance retaining device including an actuating member, a braking wheel, and a retaining member. The actuating member includes an end connected to an axle to which the adjusting screw is mounted. The braking wheel is normally in a free position not engaged with the adjusting screw when the actuating member is in a first position. When the actuating member is moved to a second position for fine adjustment, the braking wheel is moved and rotated to cause the adjusting screw to rotate through a predetermined angle such that the movable jaw is slightly moved away from the fixed jaw for a pre-determined distance. The braking wheel is retained between the adjusting screw and the retaining member after such fine adjustment.

Abstract: An adjustable wrench provides a fixed number of positions between fixed and movable torque applying jaws, the positions corresponding to nominal wrench sizes. One scale in English units provides means to position the jaws in a series of positions corresponding to English unit wrenches. A second scale in metric units provides means to position the jaws in a series of positions corresponding to metric wrenches. A pair of operators or discs have a pointer which is used to select the desired wrench size.

Abstract: An adjustable head wrench with an elongated generally straight offset handle and a stationary jaw fixed to the handle. A movable jaw rides in a bore hole and slot within the stationary jaw with a worm gear. The worm gear in turn fits into a bore hole in the movable jaw and engages internal teeth of the movable jaw with its outer helical gears. At front end of the worm gear threads mount an external adjuster outside of the stationary jaw and wrench head. This rotatable adjuster is used to rotate the worm gear which causes the distance between the object engaging surfaces of the stationary and movable jaws to vary. To retain the adjuster in place and prevent unwanted rotation with respect to the stationary jaw, a biased ball bearing mounted in a cavity of the stationary jaw is used to engage the outer surface of the adjuster.

Abstract: An adjustable wrench having a handle with two handle sections himgeably joined end to end with a jaw section mounted on one free end of one section. A clip is provided for locking orientation of the two sections with respect to one another for turning fasteners that are located in awkwardly accessible locations. Indicia on the jaws of the wrench indicate spacing of the jaws for standard sizes. The gripping surfaces of the moveable jaw has an area that is parallel to an area of the fixed jaw for quick accessibility of the wrench. The gripping surfaces of the fixed and moveable jaws also have areas that are contoured to present broad areas of contact to either a hexagonal fastener or a square fastener.

Abstract: An adjustable wrench including a fixed jaw, a movable jaw, a gear, an engaging block, a switch button and a grip. When tightening or untightening a nut with the adjustable wrench, it is unnecessary to repeatedly draw up the wrench and fit the wrench onto the nut. The nut can be continuously rotated. In addition, the switch button can be switched to change the rotational direction without reversing the adjustable wrench so as to facilitate operation and increase working efficiency.

Abstract: An adjustable wrench includes a handle, a head connected to the handle and including a fixed jaw formed thereon and a movable jaw mounted thereon, an adjusting screw rotatably mounted in a web area between the handle and the head for moving the movable jaw relative to the fixed jaw, and a clearance retaining device having an end releasably engaged with the adjusting screw. The clearance retaining device is normally in a first free position not engaged with the adjusting screw. When the clearance retaining device is moved to a second retained position for fine adjustment, the adjusting screw is rotated through a pre-determined angle such that the movable jaw is slightly moved away from the fixed jaw for a pre-determined distance. The clearance retaining device is retained in the second retained position by the adjusting screw after such fine adjustment.

Abstract: An adjustable jaw double ended wrench, where each set of jaws is gear operated. Each end wrench is adjustable, both individually and independently; the open end wrench driven by a spiral grooved shaft with beveled gears; the closed end wrench, linearly actuated by a direct driven spiral grooved shaft. At one end of the wrench is an adjustable open end wrench with a set of parallel jaws, useful in tightening or removing hex fasteners, such as hex and machine screw nuts, and cap screws. The other end, an adjustable closed end wrench for tightening or removing hex head cap screws, hex-head nuts, as well as for clutching other work. This wrench end is particularly well suited for use in areas that are blind to the user, especially in such applications as in automotive assembly and repair, ship inboard motor repair and numerous other applications of assembly and disassembly of items that may not be within the view of the user.

Abstract: The invention is a tool having contoured opposing jaws for fully engaging hexagonally shaped fasteners on at least four sides for any fastener within the operating range of the tool. The jaws include a two-surfaced jaw and an opposingly disposed three-surfaced jaw. The jaw surfaces are configured and positioned relative to one another in such a way as to maintain a shape which conforms to that of the fastener's hexagonal shape during adjustment.

Abstract: A ratcheting adjustable jaw wrench (20) includes a stationary jaw (36) having a window (42), a movable jaw (46), an adjustment screw (62) which engages the movable jaw (46), and a handle (22). A frame (54) is slidably disposed within the window which carries the adjustment screw. The frame is rotatably connected to the handle so that when the handle is rotated in a reverse direction (70), the frame, adjustment screw, and the movable jaw move away from the stationary jaw allowing the jaws of the wrench to open and ratchet over the flats 501 of the head of a bolt (500).

Abstract: The invention is a tool having contoured opposing jaws for fully engaging hexagonally shaped fasteners on at least four sides for any fastener within the operating range of the tool. The jaws include a two-surfaced jaw and an opposingly disposed three-surfaced jaw. The jaw surfaces are configured and positioned relative to one another in such a way as to maintain a shape which conforms to that of the fastener's hexagonal shape during adjustment.

Abstract: A ratcheting adjustable wrench that provides continuous clamping on a nut when rotated in a clockwise direction, while providing ratcheting when rotated in an opposite counterclockwise without having to repeatedly remove it from the nut. The wrench includes a head with a fixed jaw, a movable jaw slidably mounted in the head, a handle pivotally mounted to the head, and a cam component pivotally mounted to the head and operatively connected to the movable jaw and the handle.

Abstract: An adjustable wrench has a positioner member which moves forward and rearward to position a nut generally along a center line of the jaw drive faces. The wrench has a movable jaw with a shank which extends slidingly through a cavity in the stationary jaw. The positioner member has a rearward edge that slidingly engages a forward edge of the shank so that it will move forward relative to the stationary jaw as the movable jaw moves toward the stationary jaw. The positioner member is retained in the cavity with a pin and elongated slot arrangement. The pin extends through side walls of the cavity, or alternately it may be mounted to inner sides of the legs. The legs fit within the cavity stationarily and have a receptacle which slidingly receives a portion of the positioner member. The legs may be retained by lugs on an upper edge and lips on a lower edge. Alternately, the legs may be retained by wedging them apart from each other.

Abstract: A wrench having a slidable actuator member within an elongate recess formed in the handle, the slide member being provided with a suitable pressure-operated knob for ease of manipulation. A flexible steel member is connected at one end thereof to the slide member, with the other end connected to the integrally formed slidable spine member or keyed shaft of the adjustable jaw of the wrench. A plurality of diamond-shaped openings are provided in a row of a recess cover for receiving a matingly configured member at specific locations along the length of the handle, with the openings located at points corresponding to predefined sizes or spacing of the jaws. The matingly configured member is operated into and out of engagement with the diamond-shaped openings on depression and movement of the knob to set the jaw opening to the desired size.

Abstract: An adjustable sliding jaw wrench is disclosed which has a sliding jaw adjustment mechanism operated by a worm gear rotatably mounted in an opening in the wrench head, the worm gear driving a rack member to which the sliding jaw is attached. The worm gear is substantially shorter than the width of the opening in the wrench head in which it is mounted, and is spring biased into an operating position. A sliding locking member is movable between a locked position which will mechanically maintain the worm gear in its operating position, and an unlocked position in which the worm gear will be permitted to move in a direction opposing the biasing spring.

Abstract: A multi-purpose adjustable hand tool. The hand tool includes at one end thereof a closed box end having an adjustable opening for accommodating different size components. The other end of the multi-purpose hand tool is configured to accept a plurality of different linearly adjustable grasping members, which are adjusted at the same time the box end effective opening is adjusted. A pliers handle and grasping portion may be pivotally connected to the end of the slide for providing an adjustable pliers. Means are provided on the hand tool for linearly positioning the slide within a channel of the handle, thereby effectively changing the size of the tool grasping members.

Abstract: An adjustable wrench having locked and unlocked conditions is provided. The wrench includes a wrench body including a fixed jaw, and a movable jaw slidably mounted on the wrench body. The wrench body includes first and second contact walls, the second contact wall having a wall cam surface. The wrench also includes an adjuster assembly including a worm gear on the body between the contact walls and threadedly engaged with the movable jaw for moving the movable jaw toward and away from the fixed jaw, and a locking disc disposed between the worm gear and the second contact wall and having a disc cam surface engagable with the wall cam surface of the second contact wall.

Abstract: The invention is a tool having contoured opposing jaws for fully engaging hexagonally shaped fasteners on at least four sides for any fastener within the operating range of the tool. The jaws include a two-surfaced jaw and an opposingly disposed three-surfaced jaw. The jaw surfaces are configured and positioned relative to one another in such a way as to maintain a shape which conforms to that of the fastener's hexagonal shape during adjustment.

Abstract: An adjustable open-end wrench of the type having fixed and movable jaws at one end with a worm gear for advancing the movable jaw toward and away from the fixed jaw includes a slide-type actuating mechanism in the handle made up of thumb buttons which are assembled in elongated slots on opposite sides of the handle to engage a helical shaft and impart rotation to the shaft and to a complementary bevel gear which engages the bevel gear on the worm to cause opening and closing movement of the movable jaw.

Abstract: The invention is an adjustable plier wrench hand tool, combining the useful functions of standard adjustable wrenches with standard vise grip pliers. The invention has a main body, a plier handle having a plier handle head, and an upper and lower jaw. The lower jaw is slidably mounted to the main body and capable of moving towards and away from the upper jaw. A thumbscrew is threaded and mated to corresponding teeth on a rack integrally formed with the lower jaw, such that by rotating the thumbscrew, the lower jaw moves towards and away from the upper jaw. The thumbscrew has a bore through which a stub shaft, extends from which a cam, protrudes. By bringing the plier handle into a closed position, an apex of the plier handle head pushes against a cam surface of the cam, forcing the cam, the thumbscrew, and hence the lower jaw upwards, in effect causing a compression between the lower jaw and the upper jaw, so as to firmly grip an object typically a nut.

Abstract: A new and improved adjustable ratchet wrench apparatus includes a handle assembly and a wrench head assembly which includes a ratchet assembly and a jaw assembly. The ratchet assembly includes a ratchet assembly housing connected to the handle assembly. The ratchet assembly housing is substantially C-shaped and includes a first free-ended portion and a second free-ended portion. A first gap is provided between a first free end of the first free-ended portion and a second free end of the second free-ended portion. The ratchet assembly includes a first ratchet element supported by the ratchet assembly housing. The first ratchet element permits unidirectional rotation of the jaw assembly. The jaw assembly includes a substantially C-shaped jaw assembly housing which is nested within and is supported by the ratchet assembly housing for relative rotation between the ratchet assembly housing and the jaw assembly housing.

Abstract: A wrench including a main body having an elongate handle portion and a head portion, the head portion including a fixed primary jaw with a fixed grasping face and a pair of spaced, parallel track segments extending from the fixed grasping face, the track segments being spaced apart from one another so as to define a central channel therebetween.

Abstract: A wrench structure including a wrench head having a fixed jaw, with a movable jaw arranged in a sliding confronting relationship relative to the fixed jaw is arranged, wherein the fixed and movable jaws each include mirror image confronting faces, with each face having a mirror image V-shaped recess to accommodate enhanced securement of a wrench flat complementary surface portion of an associated workpiece for grasping within the V-shaped recesses.

Abstract: The invention relates to the head of an adjustable wrench. A threaded adjustment mechanism provides the wrench with a clamping and locking capability.

Abstract: A wrench is provided which has a worm gear and mating rack adjustable jaw positioning mechanism for placing a pair of jaws which are adjustable with respect to each other so that they may firmly grip various size nuts, with a mechanism responsive to torque applied in a first direction which causes the jaws to tighten and apply torque to the nut and also responsive to torque applied in a second direction which allows the jaws to separate and ratchet to a new position.

Abstract: An adjustable wrench mechanism is provided which has the capability of imparting significant clamping force to the movable jaw of the wrench mechanism. An elongate worm gear rotatably positioned within the handle structure of the wrench is manually rotatable to impart linear motion to an elongate drive rod within a drive rod passage of the wrench handle. To the drive rod is coupled a flexible elongate chain-like drive section capable of transitioning from the drive passage to an angularly oriented keyway and in such manner so as to engage within a drive receptacle of the key structure and impart significant driving force to the drive section of the key structure of the movable jaw. Fixed and movable jaws of the wrench mechanism define flat working surfaces that are slightly out of parallel and become precisely parallel as the tolerances of the movable jaw key and keyway are taken up by application of manual force.

Abstract: A wrench of a conventional worm gear-rack mechanism type includes a fixed jaw and a movable jaw adjustable by means of a worm gear in driving engagement with a rack mechanism of the movable jaw. The rack mechanism is movable within a slot extending through the fixed jaw; the slot being disposed to one side of an object gripping surface of the fixed jaw and along an axis perpendicular to the gripping surface. For locking the movable jaw in position when an object is being gripped between the two jaws, the movable jaw is provided with a threaded stud which extends axially of the slot and outwardly beyond an exterior surface of the fixed jaw. A nut is mounted on the stud portion extending beyond the exterior surface, the nut serving to prevent unclamping movement of the fixed jaw when the nut is screwed along the stud and into contact with the exterior surface.

Abstract: A dual-purpose adjustable wrench is comprised of a wrench body, a movable jaw unit and a worm gear rack mechanism for providing a rapid adjustment of the wrench. The wrench is further comprised of a clutch unit to enable the jaw opening to be quickly adjusted. The movable unit comprises a toothed element hinged at one of lateral sides of the movable jaw. The wrench can be alternated to function as a pipe wrench by removing the movable jaw unit, reversing and inserting it back into the wrench body.

Abstract: A lock for an adjustable wrench to lock the adjustable jaw of the wrench in adjusted position. The lock includes a slide mounted on the wrench handle adjacent the head of the wrench for longitudinal slidable and guided movement with a thumb receiving member at the end of the slide remote from the wrench head and an arcuately curved recess on the inner surface of the slide engaging with the rotatable worm wheel used to adjust the adjustable jaw of the wrench thereby retaining the worm wheel and adjustable jaw in adjusted position by frictional engagement between the slide and worm wheel.

Abstract: A plastic wrenching tool wherein the axes of the fixed and movable members are maintained substantially coincident, and rotation or displacement therebetween minimized by the provision of grooves and projections on the fixed and movable members respectively. At least the outer convex portion of the tool is made of resin. The resin material used is fibrous glass reinforced plastic which may be used for the entire tool. Specifically a fibrous glass reinforced nylon resin is used as the material of the tool. Alternatively, a matallic material may be used in a part or parts of the tool, such as in the outer concave surface portion, the inner portion of the tool, or the concave portion of the outer surface of the tool and the inner portion of the tool.

Abstract: An adjustable wrench has a stationary jaw formed at an end of a handle. A slidable jaw is mounted for linear reciprocal movement toward and away from the stationary jaw by a worm gear in mesh with a gear rack on the slidable jaw. An axially movable shaft extends through the worm gear. The worm gear is rotatably mounted on the shaft, and restrained against axial movement relative thereto. An inner end of the shaft is slidably received in a recess in the handle, and a coil spring in the recess outwardly biases the shaft. A lever has a first end pivotally mounted to an outer end of the shaft and an intermediate portion pivotally secured to the handle. The slidable jaw may be moved by rotation of the worm gear to a loosely adjusted position and may be firmly tightened into engagmeent with the head of a fastener by manipulation of the pivotal lever. The wrench allows extremely quick engagement and release with the head portions of various fasteners.

Abstract: In one embodiment an adjustable jaw socket with a gripping facility is disclosed that is adapted for use with a socket wrench or other tool for providing rotary motion. The adjustable jaw socket includes a body with a stationary jaw and slotted members in its upper portion and an aperture for receiving the drive of ratchet wrench or other socket-type wrench in its lower portion, in addition to an adjustable jaw. Means are provided for securing the movable adjustable jaw at a selected position with respect to the body. Also, means responsive to rotary motion of an attached socket-type wrench to grip a nut or bolt for loosening and tightening operations is provided.

Abstract: A socket for tightening and loosening objects having a generally cylindrical section. The socket has a sliding jaw therein which grabs the object to be twisted similar to a pipe wrench. The socket has small teeth on the inner wall to allow it to grab bolts and nuts regardless of the shape thereof (hexagonal or square), and can even grab worn down bolts and nuts. The jaw is crescent shaped, wedged. A cam along the inside of the socket assists the grabbing action of the jaw.

Abstract: A socket for tightening and loosening objects having a generally cylindrical section. The socket has a sliding jaw therein which grabs the object to be twisted similar to a pipe wrench. Thus objects with a smooth surface, such as pipes, may be twisted. The socket has small teeth on the inner wall to allow it to grab bolts and nuts regardless of the shape thereof (hexagonal or square), and can even grab worn down bolts and nuts. The jaw is crescent shaped, and wedged. A cam along the inside of the socket assist the grabbing action of the jaw.

Abstract: An adjustable socket provides continuous sizing from a minimum opening to a maximum opening to accommodate differently sized nut structures. The socket includes a socket body having a head portion and a pair of longitudinal wing portions separated by a channel region defined by a slideway region and a keyway region. A pair of jaw members are provided, each having a slide element received in the keyway region for transverse reciprocal movement and a jaw element projecting longitudinally of its slide element and received in the slideway region. When mounted, the jaw elements have facing interior work faces and oppositely facing, exterior cam surfaces. The wing portions are externally threaded and threadably receive a collar. Biasing springs apply restorative force tending to separate the jaw elements to open the region between the work faces.

Abstract: Pipe wrenches, particularly a pipe wrench which has a removable pull handle, such that the wrench can make four 90.degree. turns in close quarters. The wrench is characterized by a housing having a stationary lower gripping jaws, an upper clamping jaw housing pivoted to the lower gripping jaw and including an adjustable clamping jaw. Intersecting vertical and horizontal bores extend through the gripping jaw housing, such that a pull handle may be removably inserted therein.

Abstract: An improved and simplified vice-locking adjustable end wrench with a primary handle whose jaws are manually adjustable by a customary knurled worm gear for initial adjustment, and a simple, single clamping and gripping pivotal handle relative to the usual handle and secured at one end at the jaws and freely extending to the end of the handle to achieve a vice-like gripping action with maximum desired mechanical advantage and force when the handles are forced together to an adjustable extent in a nested relationship so that the clamping handle can effectively carry the initial wrench closing forces.

Abstract: The present invention provides a wrench having a removable key and key adjustment assembly. The key itself includes a nut receiving face having chamfered upper and lower edge regions to one side of the key and a notch intermediate the other side of the key. The key is removably secured to a threaded stem fitted within a longitudinal opening through the wrench head with a screw securing the stem to the key. The screw releases the stem and the key from another with the stem being then removable through the axial opening and the key itself being removable from the wrench head by engaging the notch with the edge of the cavity and clearing the chamfered edges past the cavity wall suh that the key pulls directly out through the cavity.

Abstract: An adjustable, self-locking crow foot wrench comprises a support member having a pair of movable jaws. A worm adjustment member is rotatably journaled on the support member and engages rack teeth on the jaws to adjust their spacing for different size bolts. A locking element, guided for movement between the worm adjustment member and a drive-stud-receiving recess, is movable into locking engagement with the worm adjustment member in response to insertion of a drive stud into the recess. A spring moves it out of locking engagement in response to removal of the drive stud. In a two-piece embodiment, the support member is a portion of one of the jaws; in a three-piece embodiment, it is a third part.

Abstract: An adjustable jaw end wrench, in which the adjustable jaw is operated by a worm gear, the worm gear is meshed with the rack of the movable jaw and the worm gear is driven by an electric motor. Linear motion propelling the jaw open and/or closed is produced by the electric motor. Batteries in the handle provide the power for the electric movement and a DPDT (Double Pole Double Throw) switch controls the function of the wrench.

Abstract: An adjustable wrench has a fixed jaw at its head. A movable jaw is adapted on a slide glidably accommodated in the wrench head, the slide being positionable in optional positions by means of an adjusting screw or other device. The slide has a web in the form of a substantially planar plate running in a slot in the wrench head. A slide rod is in engagement with grooves in the side walls of the slot. The web has an elongate opening and the slide rod constitutes a separate rod, which is inserted in the elongate opening such that it has lateral play.

Abstract: A thumb adjustable, parallel jaw end wrench, that uses a worm gear and a movable jaw with a rack, is provided with a locking feature. The worm gear is so mounted in the fixed jaw portion of the wrench that it has play in its axial direction. A first hole ("cam follower hole") that extends perpendicularly away from the head end of the gear is intersected by a second hole ("cam pin hole") running perpendicular to the cam follower hole. Biasing means urge the worm gear toward the cam pin hole. A cylindrical pin having a cam surface with high and low positions that extends radially around a central segment of the pin is rotatably mounted in the cam pin hole. Cam follower means slidably mounted in the cam follower hole ride on the cam surface and extend to the head end of the worm gear. To lock the wrench's grip on an object, the pin is turned to its high cam position, causing the follower means to push the gear, and therefore the rack and movable jaw as well, toward the fixed jaw.

Abstract: A combination adjustable/lockable/measuring wrench which enables the user of the wrench to operate, with the same hand that is holding the wrench, a push button for selectively locking and unlocking the wrench jaws in any desired position. The push button controls an over center linkage which controls the legs of a U-shaped brake shoe for selectively gripping and ungripping the wrench worm gear shaft. On one side of the wrench jaws there is provided an inch scale for measuring various bolts and nuts. On the opposite surface of the wrench jaws there is a metric scale for similarly measuring such bolts and nuts but on a metric scale, rather than on an inch scale.

Abstract: Aligned sliding jaw key set for use with any standard ratchet wrench. The device is adaptable to being made up in kits that include three jaw keys in different sizes so that they replace nine to twelve solid sockets of different sizes in metric and American standards. Each of the jaw keys has a set of jaws each one of which is provided with an angular gripping portion able to fit and hold tightly onto the sides of nuts and bolts.

Abstract: This invention relates to an improvement for an adjustable open end wrench of the type comprising a stationary jaw and a movable jaw having a rack gear coupled thereto. A helical gear is coupled between the rack gear and the stationary jaw for driving the movable jaw toward and away from the stationary jaw. The rotational axis of the helical gear is oriented at an acute angle with respect to the longitudinal axis of the rack gear and the direction of motion of the movable jaw. This acute angle is substantially equal to the pitch axis of the helical gear teeth, whereby tangential sections of the helical gear teeth which are in sliding communication with the rack gear teeth are substantially perpendicular to the direction of motion of the movable jaw.

Abstract: Improvements in construction of an open end adjustable wrench of the type which utilizes a handle enclosed helix-actuating assembly and thumb slide actuator for opening and closing the jaws of the wrench, such improvements being directed to the handle cavity, helix actuator and bearing members in support thereof. More particularly, the actuator cavity is of such design and shape that it can be formed as by drop forging while unitarily forming base bearing members therein in properly spaced relationship for receiving the helix actuator in rotatable, longitudinally fixed position to extend a bevel gear into proper operational relationship with a mating bevel gear to drive the jaw adjusting worm gear within the head of the wrench. A cavity cover plate is then unitarily formed with properly positioned retaining bearings such that the cover plate is easily affixed over the cavity with retaining bearings in proper position to coact with the helix actuator.