Abstract: A ratcheting wrench includes a first jaw with a first jaw insert configured to move relative to the first jaw and a first spring configured to bias the first jaw insert in a first direction. The wrench also includes a second jaw with a second jaw insert configured to move relative to the second jaw and a second spring configured to bias the second jaw insert in a second direction opposite the first direction. When the first jaw insert moves relative to the first jaw and the second jaw insert moves relative to the second jaw, a space between the first jaw and the second jaw increases. This allows the jaws of the wrench to slip over corners of a fastener to achieve a ratcheting effect.

Abstract: A wrench has a head with an inside cylindrical wall surrounding a body with ramps. Cylindrical rollers located between the ramps and the cylindrical wall of the head are moved into wedging positions relative to the ramps and the inside cylindrical wall with permanent magnets located in a cage assembly anchored on the body.

Abstract: An open-end wrench includes a handle and a movable jaw. The handle includes an open end formed with a root, a first stationary jaw extending from the root, and a second stationary jaw extending from the root. The movable jaw is connected to the second stationary jaw and moveable between an idle position and an active position relative to the second stationary jaw. The movable jaw includes an operative face that includes a first planar facet and a second planar facet extending at an angle relative to the first planar facet. The first and second planar facets are respectively in contact with two adjacent sides of a hexagonal head in the active position.

Abstract: A wrench includes a body having a head and a handle portion defining a longitudinal axis. The wrench includes a first jaw coupled to the head with the first jaw including first teeth and an edge. The edge defines a width of the first jaw. The wrench includes a second jaw extending through an aperture of the head with the second jaw including a threaded portion and second teeth. The wrench includes an actuator coupled to the threaded portion of the second jaw such that rotation of the actuator relative to the second jaw moves the second teeth relative to the first teeth. A length is measured from the edge of the first jaw to the second end of the handle portion parallel to the longitudinal axis. A ratio of the width of the first jaw over the length is less than 0.06.

Abstract: A handle for a computer component, such as a motherboard, of an information handling system may have an adjustable size. By allowing the handle to change size, the advantages of a large handle, such as easy handling and reduced damage to nearby components, are gained, and the advantages of a small handle, such as reduced size and improved airflow, are gained. The handle may be affixed to a computer component by any fastener such as a screw, pin, clip, or plastic connector. The handle may change size by increasing in height from a collapsed position to an expanded position, or change size by decreasing in height from an expanded position to a collapsed position. The handle may be moved into the expanded position for handling during assembly or repairs of a computer system, and then moved in to the collapsed position for normal operation of the computer system.

Abstract: An open end wrench includes a body having a jaw portion for holding a workpiece. The jaw portion includes an arcuate sliding groove, an expanding groove, and a slider movable relative to the arcuate sliding groove along an arcuate path. The jaw includes a first jaw having a force-applying face and an evasive portion adjacent to the force-applying face. When the jaw portion deforms elastically while wrenching the workpiece, the expanding groove increases the expanding effect within an elastic limit of the jaw portion, such that a corner between the force-receiving face in a first rotating direction and a sixth force-receiving face in a second rotating direction can move across the force-applying face into the evasive portion, avoiding damage to the slider and the first jaw resulting from failure in withstanding the reactive force from the workpiece. Thus, the open end wrench has high toughness and a long service life.

Abstract: A ratcheting wrench head for use with a torque wrench has spaced apart first and second jaws extending from a base portion to define an opening for accommodating a bolt or nut to be rotated. A ratchet member is movably mounted in a through hole formed in the second jaw between an outer surface and an inner surface of the second jaw. A biasing member is located in the through hole of the second jaw and forces the ratchet member against a portion thereof. Inner surfaces of the first jaw and the second jaw are particularly constructed to enhance ratcheting performance of the wrench head relative to the bolt or nut. The through hole is formed with a dirt slot for enabling removal of foreign material from the wrench head.

Abstract: An open wrench includes a body having a mounting hole which is partially defined by a first side face which has a curved reception recess and a cavity which communicates with the reception recess. A protrusion is formed at the intersectional area between the cavity and the reception recess. A first contact face is located in opposite to the first side face of the mounting hole so as to contact one side of the object. A second distance is defined between the reception recess and the first contact face. The second distance is larger than the diametrical distance of two corners of the object. A slide is located in the cavity and a resilient member is located in the cavity to bias the slide which partially protrudes from the cavity. The slide is restricted from dropping from the cavity by the protrusion. The slide contacts the object.

Abstract: A ratchetable open-ended wrench includes a handle for a hand to grasp, a wrench head located on one end of the handle, and a fastener room located in the wrench head for accommodating a workpiece to be rotated. The wrench head further includes a first jaw having a first driving wall, a second jaw having a second driving wall facing the first driving wall, an inner wall extending from the second driving wall into the second jaw, a concavity, an auxiliary jaw retracting opening, an auxiliary jaw capable of longitudinally sliding into the auxiliary jaw retracting opening in an elastic way, and an auxiliary jaw limiting member coupled to a limiting slot. The auxiliary jaw further includes an exterior end having a pillow in contact with the driving wall and a pushing surface for working together with the first jaw to grip the workpiece under operation, an interior end, and a limiting slot.

Abstract: A ratcheting wrench head for use with a torque wrench has spaced apart first and second jaws extending from a base portion to define an opening for accommodating a bolt or nut to be rotated. A ratchet member is movably mounted in a through hole formed in the second jaw between an outer surface and an inner surface of the second jaw. A biasing member is located in the through hole of the second jaw and forces the ratchet member against a portion thereof. Inner surfaces of the first jaw and the second jaw are particularly constructed to enhance ratcheting performance of the wrench head relative to the bolt or nut. The through hole is formed with a dirt slot for enabling removal of foreign material from the wrench head.

Abstract: A returning device of a wrench tool contains a body including a tool segment disposed on at least one end portion thereof and having two jaws, an engaging face of at least one of the two jaws including a recessed section in which a receiving groove with a stop rim is formed, the stop rim including a slot fixed on an eccentric position thereof; an auxiliary retainer inserted in the receiving groove and having a retaining portion; a positioning shaft including a front end connected at an eccentric position of a rear end of the auxiliary retainer and including a rear end extending out of the slot and allowing to prevent the auxiliary retainer from disengagement from the receiving groove; a resilient element used to push the auxiliary retainer so that the retaining portion extends out of the recessed section of the at least one of the two jaws.

Abstract: An anti-abrasion open end quick turn wrench is suitable for rotating a fastener with a head portion and includes: a body and an assistant engaging member. When the head portion of the fastener is completely engaged in the engaging slot, the wrench is provided with anti-abrasion concaves to provide enough room to prevent the open end wrench from interfering with the angles of the head portion of the fastener, and consequently preventing abrasion of the head portion of the fastener. Meanwhile, at least three lateral surfaces of the head portion of the fastener will be clamped by the wrench, when one or two of the clamped four lateral surfaces of the fastener is damaged or worn out, the fastener still has at least two intact lateral surfaces clamped by the open end quick turn wrench, so it can still be rotated by the wrench.

Abstract: An open wrench includes a body having a mounting hole which is partially defined by a first side face which has a curved reception recess and a cavity which communicates with the reception recess. A protrusion is formed at the intersectional area between the cavity and the reception recess. A first contact face is located in opposite to the first side face of the mounting hole so as to contact one side of the object. A second distance is defined between the reception recess and the first contact face. The second distance is larger than the diametrical distance of two corners of the object. A slide is located in the cavity and a resilient member is located in the cavity to bias the slide which partially protrudes from the cavity. The slide is restricted from dropping from the cavity by the protrusion. The slide contacts the object.

Abstract: A one-way open-end wrench includes two jaws and a swing block. The first jaw includes a flat face, a concave face, and a supporting element extending on the concave face and including two flat ends. The swing block includes two fins extending on an upper face of a platform. Each fin includes a convex face corresponding to the concave face. The fins are connected to the supporting element so that the swing block can swing relative to the supporting element. The lower face of the platform does not extend parallel to the flat face of the first jaw when the first flat end of the supporting element contacts the upper face of the platform. The lower face of the platform extends parallel to the flat face of the first jaw when the second flat end of the supporting element contacts the upper face of the platform.

Abstract: An adjustable wrench has a wrench body, a clamping element and a ratcheting jaw. The wrench body has a handle, a head and a thumbscrew. The head is formed on a front end of the handle and has a connecting block, a fixed jaw, a curved slot, a positioning pin, a mounting recess and a sliding slot. The clamping element is movably connected to the wrench body and has a rear end, a front end, a sliding bar and a movable jaw. The sliding bar is formed on the rear end of the clamping element, is mounted in the sliding slot and engages the thumbscrew and has multiple teeth. The ratcheting jaw is a curved block capable of sliding forward and retracting backward inside the curved slot and has a backward area, a forward area, a guide hole, an engaging surface, an abutting surface, an engaging protrusion and a spring.

Abstract: An apparatus for removing an oil filter. The apparatus includes a top plate and a bottom plate. A gear is meshed with two spring loaded clamps located between the top and bottom plate. The gear is operable by an external device to apply clamping force to an oil filter via the clamps.

Abstract: A ratchet-action open-end wrench of the present invention has a simplified structure. Arc-shaped abutting surface and corresponding groove is dismissed from the present wrench. Thus, components of the wrench can be manufactured and fabricated easily, and specified producing process can be chosen for obtaining strengthened structure. In addition, cost of the wrench is abated, precision of the wrench is arisen, and lift-time of the wrench is prolonged.

Abstract: An anti-abrasion open end quick turn wrench is suitable for rotating a fastener with a head portion and includes: a body and an assistant engaging member. When the head portion of the fastener is completely engaged in the engaging slot, the wrench is provided with anti-abrasion concaves to provide enough room to prevent the open end wrench from interfering with the angles of the head portion of the fastener, and consequently preventing abrasion of the head portion of the fastener. Meanwhile, at least three lateral surfaces of the head portion of the fastener will be clamped by the wrench, when one or two of the clamped four lateral surfaces of the fastener is damaged or worn out, the fastener still has at least two intact lateral surfaces clamped by the open end quick turn wrench, so it can still be rotated by the wrench.

Abstract: A ratchetable open-ended wrench includes a handle H for a hand to grasp, a wrench head 100 located on one end of the handle, and a fastener room 160 located in the wrench head 100 for accommodating a workpiece W to be rotated. The wrench head 100 further includes a first jaw 110 having a first driving wall 114, a second jaw 120 having a second driving wall 124 facing the first driving wall 114, an inner wall 126 extending from the second driving wall 124 into the second jaw 120, a fastener-jaw room 128, an auxiliary jaw retracting opening 13, an auxiliary jaw 140 capable of longitudinally sliding into the auxiliary jaw retracting opening 130 in an elastic way, and an auxiliary jaw limiting member 150 coupled to a limiting slot 148. The auxiliary jaw 140 further includes an exterior end 142 having a pillow 142 in contact with the driving wall 126 and a pushing surface 144 for working together with the first jaw 110 to grip the workpiece W under operation, an interior end 146, and a limiting slot 148.

Abstract: A wrench for gripping a rotary fastener, includes: a main body including a handle and a C-shaped head portion that is formed with parallel first and second holes; a first gripping element being resiliently movable in the first hole; and a second gripping element being resiliently movable in the second hole. When the main body is rotated clockwise, the rotary fastener is clamped between the first and second gripping elements and is rotated together with the main body. When the main body is rotated counterclockwise, the first and second gripping elements are moved resiliently by the rotary fastener to be separated from the rotary fastener.

Abstract: A one-way open-end wrench includes two jaws and a swing block. The first jaw includes a flat face, a concave face, and a supporting element extending on the concave face and including two flat ends. The swing block includes two fins extending on an upper face of a platform. Each fin includes a convex face corresponding to the concave face. The fins are connected to the supporting element so that the swing block can swing relative to the supporting element. The lower face of the platform does not extend parallel to the flat face of the first jaw when the first flat end of the supporting element contacts the upper face of the platform. The lower face of the platform extends parallel to the flat face of the first jaw when the second flat end of the supporting element contacts the upper face of the platform.

Abstract: The invention comprises a ratchet style open end wrench which incorporates an assembly to provide a torqueing function and ratchet effect. The assembly includes a wrench body capable of providing torque delivery through two or more rotating cylindrical cams which contact the nut. The cylindrical cams then rotate when reversing the direction of the wrench assembly so that a cutout portion of the cylindrical cams allows the nut points to pass by. In one embodiment, the direction of the ratchet effect is reversible by a reversing arc wire which is activated by use of a lever.

Abstract: An adjustable nut wrench comprising a handle section and a slide guided element that is pushed by a lever or a spring to a position where abutment surfaces are parallel to two or three of the nut's sides. A preferred embodiment of the wrench comprises two parallel abutment surfaces which are set to a maximum angle of 60 degrees to the direction of the sliding element movement. Another embodiment of the wrench has three abutment surfaces separated by an angle of 60 degrees to one another where one of them is sliding. In further embodiments of the wrench the same method, using a moving sloping abutment surface for a jaw locking, is used.

Abstract: An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having two support walls and an arcuate sliding wall between the support walls. A slide is slideably received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. Two wings respectively extend from top and bottom faces of the slide. Top and bottom extension faces extend from a wrenching face of the slide and are located on inner faces of the wings. When the open end wrench drives a workpiece to rotate, an outer face of each wing is partially in contact with the second jaw. Force imparted from the workpiece to the wings is transmitted to the second jaw.

Abstract: An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having two support walls and an arcuate sliding wall between the support walls. A slide is slideably received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. Two wings respectively extend from top and bottom faces of the slide. Top and bottom extension faces extend from a wrenching face of the slide and are located on inner faces of the wings. A spacing is formed between an outer face of each wing and one of the support walls to avoid friction, allowing smooth movement of the slide between an extended position and a retracted position.

Abstract: An open wrench includes an elongate body with a head located on an end of the body. The head includes two jaws and a mounting hole is defined between the two jaws. One of the jaws has a curved recess, a curved guide slot and a notch defined in the inside thereof. The other jaw has a curved convex contact face protruding from the inside thereof. An engaging member is movably located in the curved guide slot and a resilient member biases the engaging member which performs as a ratchet wrench. Two covers are respectively connected to the top and the bottom of the head to cover up the engaging member and the resilient member.

Abstract: An open end wrench includes a jaw portion having first and second jaws. The first jaw includes a sliding groove slideably receiving a slide. When the jaw portion is not engaged with a workpiece, the slide is in a free position. When the jaw portion receives the workpiece but does not drive the workpiece, a buffering space is formed between an abutting end of the guiding slot and a guide fixed in the sliding groove. When the jaw portion drives the workpiece and deforms elastically, the body rotates relative to the workpiece, but the slide does not rotate together with the body due to the buffering space such that the end of the slide remains in surface contact with a face of the workpiece. Also, a buffering angle can be formed between a wrenching face on the slide and the face of the workpiece when the jaw portion receives the workpiece but does not drive the workpiece.

Abstract: A returning device of a wrench tool contains a body including a tool segment disposed on at least one end portion thereof and having two jaws, an engaging face of at least one of the two jaws including a recessed section in which a receiving groove with a stop rim is formed, the stop rim including a slot fixed on an eccentric position thereof; an auxiliary retainer inserted in the receiving groove and having a retaining portion; a positioning shaft including a front end connected at an eccentric position of a rear end of the auxiliary retainer and including a rear end extending out of the slot and allowing to prevent the auxiliary retainer from disengagement from the receiving groove; a resilient element used to push the auxiliary retainer so that the retaining portion extends out of the recessed section of the at least one of the two jaws.

Abstract: A ratchetable open-ended wrench includes a handle for a hand to grasp, a wrench head located on one end of the handle, and a fastener room located in the wrench head for accommodating a workpiece to be rotated. The wrench head further includes a first jaw having a first driving wall, a second jaw having a second driving wall facing the first driving wall, an inner wall extending from the second driving wall into the second jaw, a concavity, an auxiliary jaw retracting opening, an auxiliary jaw capable of longitudinally sliding into the auxiliary jaw retracting opening in an elastic way, and an auxiliary jaw limiting member coupled to a limiting slot. The auxiliary jaw further includes an exterior end having a pillow in contact with the driving wall and a pushing surface for working together with the first jaw to grip the workpiece under operation, an interior end, and a limiting slot.

Abstract: A unidirectional ratchet wrench has a head and a ratcheting assembly. The head has a stationary jaw and a ratchet jaw. The stationary jaw is formed on and protrudes from the head and has an undulating surface. The ratchet jaw is formed on and protrudes from the head and has an arced slot formed in an inner surface of the ratchet jaw. The ratcheting assembly has an engaging tab being movably mounted in the arced slot and selectively engaging and disengaging a tool head with the inner surface of the stationary jaw when the wrench is respectively rotated in drive and non-drive directions.

Abstract: An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having an arcuate sliding wall. A slide is received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. An arcuate guiding slot is formed in the slide. A guide is fixed in the sliding groove and received in the guiding slot. The guiding slot includes an abutting end and a pressing end. The abutting end is in contact with the guide when the slide is in an initial position. A spring seat is mounted in the pressing end of the guiding slot. The spring seat includes a face pressing against the pressing end. An elastic element has two ends respectively abutting the guide and the other face of the spring seat for biasing the slide to the initial position.

Abstract: A wrench for engaging a workpiece comprises a pair of fixed jaws and a pair of movable jaws being movable relative to the pair of fixed jaws. The workpiece includes a plurality of flats which may be adjoined at a plurality of corners. The pairs of fixed and movable jaws may be configured to engage the workpiece in at least one of a flat engaging position and a corner engaging position. The flat engaging position comprises the pairs of fixed and movable jaws being engaged to one of the flats on each one of the opposing sides of the workpiece. The corner engaging position comprises the pairs of fixed and movable jaws being engaged to an adjacent pair of the flats on each one of the opposing sides of the workpiece.

Abstract: An open end wrench includes first and second jaws formed on a jaw portion. The first jaw includes an arcuate sliding groove having an arcuate sliding wall. A slide is received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. An arcuate guiding slot is formed in the slide. The sliding face, sliding wall and guiding slot are free of holes, grooves, and recesses. A guide is fixed in the sliding groove and received in the guiding slot. The guiding slot includes an abutting end and a pressing end. The abutting end is in contact with the guide when the slide is in an initial position not engaged with a workpiece. An elastic device has two ends respectively abutting the guide and the pressing end of the guiding slot for biasing the slide to the initial position.

Abstract: An open end wrench (10) includes first and second jaws (23, 24) formed on a jaw portion (22). The first jaw (23) includes an arcuate sliding groove (27) having two support walls (272, 273) and an arcuate sliding wall (271) between the support walls (272, 273). A slide (30) is received in the sliding groove (27) and includes an arcuate sliding face (31) slideable along the sliding wall (272). An arcuate guiding slot (35) is formed in the slide (30). A guide (28) is fixed in the sliding groove (27) and received in the guiding slot (35). The guiding slot (35) includes a pressing end (352). An elastic device (40) has two ends respectively abutting the guide (28) and the pressing end (352) of the guiding slot (35) for biasing the slide (30) to a natural position. The slide (30) includes a first wrenching face (32) having two wings (36). A spacing (L) is formed between each wings (36) and one of the support walls (272, 273).

Abstract: An open wrench includes a recess defined by two clamp surfaces and two engaging surfaces to mount to a bolt head. One of the clamp surfaces has a passage and the movable member is located in the passage. The movable member has a spherical distal end and protrudes from the clamp surface. Each of the clamp surfaces has a tangential surface and a distance between the two tangential surfaces is longer than the maximum distance between two corners of the bolt head. An angle is defined between the axis of the passage and the tangential surface of the clamp surface. The clip is engaged within the passage and the outer periphery of the clip is engaged with the annular groove and the inner periphery of the clip protrudes from the extension so as to contact the second shoulder to prevent the movable member from dropping from the passage.

Abstract: A ratchetable open-ended wrench includes a handle for a hand to grasp, a wrench head located on one end of the handle, and a fastener room located in the wrench head for accommodating a workpiece to be rotated. The wrench head further includes a first jaw having a first driving wall, a second jaw having a second driving wall facing the first driving wall, an inner wall extending from the second driving wall into the second jaw, a concavity, an auxiliary jaw retracting opening, an auxiliary jaw capable of longitudinally sliding into the auxiliary jaw retracting opening in an elastic way, and an auxiliary jaw limiting member coupled to a limiting slot. The auxiliary jaw further includes an exterior end having a pillow in contact with the driving wall and a pushing surface for working together with the first jaw to grip the workpiece under operation, an interior end, and a limiting slot.

Abstract: Among other things, an open-ended wrench comprises a wrench head defining an opening to receive a work piece. The wrench head comprises a first jaw including at least a first surface to engage with a surface of the work piece, a second jaw including a first curved surface facing the opening, and a plate mounted on the second jaw and movable relative the second jaw. The plate comprises at least a second surface to engage with another surface of the work piece. The plate also comprises a second curved surface engaging the first curved surface and being slidable against the first curved surface.

Abstract: The present invention discloses a ratchetable open-ended wrench comprising wrench body and retractable jaw member. The wrench body comprises head with two opposite jaws and a receiving hole. The inner surface of the receiving hole has a sunken slot with an inner circular arc surface. The retractable jaw member is slidably mounted in the sunken slot and has two opposite sides, and one side is directing to the receiving hole and has a second engaging portion. The retractable jaw member and the head are against with an elastic member. The retractable jaw member is able to move from a first position to a second position in the sunken slot, and is able to limit a workpiece to rotate in the receiving hole when at the first position and to allow the workpiece to rotate in the receiving hole when at the second position.

Abstract: A wrench for engaging a workpiece comprises a pair of fixed jaws and a pair of movable jaws being movable relative to the pair of fixed jaws. The workpiece includes a plurality of flats which may be adjoined at a plurality of corners. The pairs of fixed and movable jaws may be configured to engage the workpiece in at least one of a flat engaging position and a corner engaging position. The flat engaging position comprises the pairs of fixed and movable jaws being engaged to one of the flats on each one of the opposing sides of the workpiece. The corner engaging position comprises the pairs of fixed and movable jaws being engaged to an adjacent pair of the flats on each one of the opposing sides of the workpiece.

Abstract: An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having two support walls and an arcuate sliding wall between the support walls. A slide is slideably received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. Two wings respectively extend from top and bottom faces of the slide. Top and bottom extension faces extend from a wrenching face of the slide and are located on inner faces of the wings. When the open end wrench drives a workpiece to rotate, an outer face of each wing is partially in contact with the second jaw. Force imparted from the workpiece to the wings is transmitted to the second jaw.

Abstract: A mounting and dismounting device for cylindrical bodies comprises a fixing element, a moving element, and a buckling element. The fixing element connects to the moving element on both sides to form a hole. The cylindrical body is then inserted into the hole. A buckling part of the buckling element pivotally connects to the fixing element. One lifts a lifting part for the buckling element to urge against the cylindrical body in the hole. By lifting the lifting part, the cylindrical body can be mounted or dismounted.

Abstract: An open ended, adjustable, ratcheting wrench comprising an extendable handle, a fixed upper jaw attached to the handle and a moveable lower jaw containing a sliding protrusion. One of the upper jaws and the lower jaw has a generally V-shaped recess. The other of the upper or lower jaws contains the sliding protrusion aligned with a center line of the V-shaped recess.

Abstract: A reversible open end wrench includes a handle, a head and a retainer. The head includes a first jaw, a second jaw and an extension section. The jaws and the extension section define a driving area therebetween. The first jaw has a first engaging surface and a distal end. The second jaw has a second engaging surface. The horizontal distance between the two engaging surfaces is s. The retainer is disposed on the distal end and has a retaining end extending toward the driving area. The retaining end is movable between a first position and a second position. As the retaining end locates at the first position, the horizontal distance between the retaining end and the second engaging surface is smaller than s. As the retaining end locates at the second position, the horizontal distance between the retaining end and the second engaging surface is no smaller than s.

Abstract: A wrench for engaging a workpiece comprises a pair of fixed jaws and a pair of movable jaws being movable relative to the pair of fixed jaws. The workpiece includes a plurality of flats which may be adjoined at a plurality of corners. The pairs of fixed and movable jaws may be configured to engage the workpiece in at least one of a flat engaging position and a corner engaging position. The flat engaging position comprises the pairs of fixed and movable jaws being engaged to one of the flats on each one of the opposing sides of the workpiece. The corner engaging position comprises the pairs of fixed and movable jaws being engaged to an adjacent pair of the flats on each one of the opposing sides of the workpiece.

Abstract: The present invention discloses a ratchetable open-ended wrench comprising wrench body and retractable jaw member. The wrench body comprises head with two opposite jaws and a receiving hole. The inner surface of the receiving hole has a sunken slot with an inner circular arc surface. The retractable jaw member is slidably mounted in the sunken slot and has two opposite sides, and one side is directing to the receiving hole and has a second engaging portion. The retractable jaw member and the head are against with an elastic member. The retractable jaw member is able to move from a first position to a second position in the sunken slot, and is able to limit a workpiece to rotate in the receiving hole when at the first position and to allow the workpiece to rotate in the receiving hole when at the second position.

Abstract: An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having two support walls and an arcuate sliding wall between the support walls. A slide is slideably received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. Two wings respectively extend from top and bottom faces of the slide. Top and bottom extension faces extend from a wrenching face of the slide and are located on inner faces of the wings. A spacing is formed between an outer face of each wing and one of the support walls to avoid friction, allowing smooth movement of the slide between an extended position and a retracted position.

Abstract: An open end wrench includes a jaw portion having first and second jaws. The first jaw includes a sliding groove slideably receiving a slide. When the jaw portion is not engaged with a workpiece, the slide is in a free position. When the jaw portion receives the workpiece but does not drive the workpiece, a buffering space is formed between an abutting end of the guiding slot and a guide fixed in the sliding groove. When the jaw portion drives the workpiece and deforms elastically, the body rotates relative to the workpiece, but the slide does not rotate together with the body due to the buffering space such that the end of the slide remains in surface contact with a face of the workpiece. Also, a buffering angle can be formed between a wrenching face on the slide and the face of the workpiece when the jaw portion receives the workpiece but does not drive the workpiece.

Abstract: An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having an arcuate sliding wall. A slide is received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. An arcuate guiding slot is formed in the slide. A guide is fixed in the sliding groove and received in the guiding slot. The guiding slot includes an abutting end and a pressing end. The abutting end is in contact with the guide when the slide is in an initial position. A spring seat is mounted in the pressing end of the guiding slot. The spring seat includes a face pressing against the pressing end. An elastic element has two ends respectively abutting the guide and the other face of the spring seat for biasing the slide to the initial position.

Abstract: An open end wrench (10) includes first and second jaws (23, 24) formed on a jaw portion (22). The first jaw (23) includes an arcuate sliding groove (27) having two support walls (272, 273) and an arcuate sliding wall (271) between the support walls (272, 273). A slide (30) is received in the sliding groove (27) and includes an arcuate sliding face (31) slideable along the sliding wall (272). An arcuate guiding slot (35) is formed in the slide (30). A guide (28) is fixed in the sliding groove (27) and received in the guiding slot (35). The guiding slot (35) includes a pressing end (352). An elastic device (40) has two ends respectively abutting the guide (28) and the pressing end (352) of the guiding slot (35) for biasing the slide (30) to a natural position. The slide (30) includes a first wrenching face (32) having two wings (36). A spacing (L) is formed between each wings (36) and one of the support walls (272, 273).

Abstract: An open end wrench includes first and second jaws formed on a jaw portion. The first jaw includes an arcuate sliding groove having an arcuate sliding wall. A slide is received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. An arcuate guiding slot is formed in the slide. The sliding face, sliding wall and guiding slot are free of holes, grooves, and recesses. A guide is fixed in the sliding groove and received in the guiding slot. The guiding slot includes an abutting end and a pressing end. The abutting end is in contact with the guide when the slide is in an initial position not engaged with a workpiece. An elastic device has two ends respectively abutting the guide and the pressing end of the guiding slot for biasing the slide to the initial position.