Abstract: An adjustable socket assembly includes a collet having a first end, a second end, and a perimeter wall. The second end has a receiving aperture therein. The collet is divided into a plurality a plurality of sections. A sleeve has a bottom end that receives the collet. The sleeve has an interior surface that tapers inwardly and abuts the sections to move toward each other as the sleeve moves toward the second ends of the sections. A biasing member extends through a top end of the sleeve and engages each of the sections. The biasing member is actuated to bias the sleeve downward to close together the sections and engaged the valve actuator. An engagement head is attached to the upper end of the biasing member and engages a tool to rotate the collet.

Abstract: A conductor trimmer may be provided. The conductor trimmer may include a grip and a trimmer. The grip may include a grip handle and a trimmer groove. The trimmer may include a trimmer handle. The trimmer may engage the trimmer groove. With trimmer snuggly attached to both the grip and a conductor, the trimmer may be rotated about conductor by a user holding the grip handle stationary and rotating the trimmer by the trimmer handle. As the trimmer rotates about the conductor, a first roller rail and a second roller rail may ride in the trimmer groove as a blade cuts layers of strands from the conductor.

Abstract: An adjustable-size socket formed as a pair of coaxial tubes in rotatable relationship to one another, the innermost tube having a limited directional distance and independently rotational relationship with the outer tube by rotating along a mated set of threaded structures on immediately adjacent sides of the coaxial pair of tubes. The inner tube is a deep well chamber having a tool receiving end and a fastener receiving end, with an annular array of independently pivotable fingers arranged about an internal perimeter of the inner tube at the fastener receiving end. Rotation of the inner tube pushes a lowermost portion of the inner tube against the fingers, pushing them into the deep well chamber and around an irregularly shaped bolt or nut style fastener, gripping the fastener and allowing a user to remove or reinstall the fastener. The fingers self-adjust around the fastener.

Abstract: A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises first-jaw arcuate convex contact surfaces. The second jaw, is coupled with and pivotable relative to the first jaw, and comprises second-jaw arcuate convex contact surfaces. The third jaw, is coupled with and pivotable relative to the second jaw, and comprises a third-jaw arcuate convex contact surface and a third-jaw planar contact surface.

Abstract: A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises a first-jaw arcuate convex contact surface, a second first-jaw arcuate convex contact surface, a third first-jaw arcuate convex contact surface, and a first-jaw planar contact surface. The second jaw is coupled with and pivotable relative to the first jaw and comprises a second-jaw arcuate convex contact surface, a second second-jaw arcuate convex contact surface, and a second-jaw planar contact surface. The third jaw is coupled with and pivotable relative to the second jaw and comprises third-jaw arcuate convex contact surfaces.

Abstract: A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises a first-jaw arcuate convex contact surface, a second first-jaw arcuate convex contact surface, a third first-jaw arcuate convex contact surface, and a first-jaw planar contact surface. The second jaw is coupled with and pivotable relative to the first jaw and comprises a second-jaw arcuate convex contact surface and a second-jaw planar contact surface. The third jaw is coupled with and pivotable relative to the second jaw and comprises third-jaw arcuate convex contact surfaces.

Abstract: A wrench head comprises a working axis, a first jaw, a second jaw, and a third jaw. The first jaw comprises first-jaw arcuate convex contact surfaces. The second jaw is coupled with and pivotable relative to the first jaw and comprises a second-jaw arcuate convex contact surface, a second second-jaw arcuate convex contact surface, and a second-jaw planar contact surface. The third jaw is coupled with and pivotable relative to the second jaw and comprises a third-jaw arcuate convex contact surface and a third-jaw planar contact surface.

Abstract: Adjustable fastener tools are provided for engaging socket heads. The tool includes a support member, multiple engagement fingers, and an adjustment mechanism. The support member has multiple radially-extending tracks, and a central opening, and the fingers are associated with, and slidable along, the radially-extending tracks. The fingers include at radially inner ends jaws with respective contact surfaces for engaging the socket head. The adjustment mechanism resides, at least in part, within the central opening in the support member, and couples to the fingers. The adjustment mechanism includes an actuating member and multiple hinged trusses. A hinged truss of the trusses is hingedly coupled at one end to the actuating member and hingedly coupled at an other end to a respective finger of the engagement fingers. Movement of the actuating member results, via the hinged truss, in slidable movement of the respective finger along its associated radially-extending track.

Abstract: A conductor trimmer may be provided. The conductor trimmer may include a grip and a trimmer. The grip may have a grip handle and a trimmer groove. The trimmer may include a trimmer handle. The trimmer may engage the trimmer groove. With trimmer snuggly attached to both the grip and a conductor, the trimmer may be rotated about conductor by a user holding the grip handle stationary and rotating the trimmer by the trimmer handle. As the trimmer rotates about the conductor, a first roller rail and a second roller rail may ride in the trimmer groove as a blade cuts layers of strands from the conductor.

Abstract: A ratchet wrench capable of rotating quickly and driving rotation includes a handle, a rotary head, a positioning mechanism, and a sleeve. The handle includes an arm and a bar body. The bar body includes an accommodating slot; the arm includes a through hole. The rotary head is connected to the arm and includes recess portions. The positioning mechanism includes a positioning element, a resilient body, and a block element. The resilient body receives the positioning element and is received in the through hole, the positioning element is correspondingly disposed in any of the recess portions, and the block element is connected to the positioning element. The sleeve receives the bar body and operably drives the block element to slide in the accommodating slot, so that the positioning element is positioned and selectively engaged with any recess portion.

Abstract: A torque wrench is disclosed for use in rotating a range of different sized fasteners. The torque wrench may include an input end configured to receive a torsional input, and a gear train operatively driven to rotate by the torsional input. The torque wrench may further include a driver connected to the gear train at an output end and having an axial end surface with a plurality of arcuate slots formed in the axial end surface, and a plurality of clamps each pinned to a corresponding one of the plurality of arcuate slots and moveable by rotation of the driver to radially engage a range of different sized fasteners. The torque wrench may additionally include a housing configured to enclose the gear train, the driver, and the plurality of clamps.

Abstract: A joint-removing tool includes a control unit, a clamp unit and a connector unit. The control unit includes two pivotally connected levers each including a handle and a pivoting section. The handle and the pivoting section of the first lever are located between that of the second lever. The clamp unit includes a shell and two jaws. Each of the jaws includes a first section movably inserted in the shell, a second section in contact with the shell, and a third section located out of the shell. The connector unit includes a wire extending throughout a sheath. The wire includes an end connected to the pivoting section of the first lever and another end connected to the first sections of the jaws. The sheath includes an end connected to the pivoting section of the second lever and another end connected to the shell.

Abstract: An inventive stud removal and installation tool and method of use is disclosed. The inventive tool incorporates a body configured to hold a cage, cam sleeve and jaws. The cam sleeve is capable of being oriented to accomplish either stud removal or installation. The assembly of the tool is modular such that broken elements can be replaced without the need to replace the entirety of the tool.

Abstract: An electric tightening head for tightening a lock nut of a single through shaft, comprising a supporting plate (1), sliding blocks (2), tightening jaws (3), springs (4), wedged pad irons (5), wedged pad iron connecting arms (6), a pulling rod (7), an initial position detecting bolt (8) and stop bolts (9), wherein the supporting plate (1) is connected with the sliding blocks (2), the tightening jaws (3) and the pulling rod (7); the springs (4) are connected with the stop bolts (9) mounted on the tightening jaws (3); the tightening jaws (3) are connected with the wedged pad irons (5); the wedged pad irons (5) are connected with the wedged pad iron connecting arms (6); and an upper end of the pulling rod (7) is connected with the initial position detecting bolt (8).

Abstract: A brake cylinder adjustment assembly for adjusting brake cylinders of different sizes and includes a rotation unit and a driving unit which is connected with the rotation unit. The rotation unit includes a rotatable disk, a fixed disk, at least two positioning rods and a clip. The rotatable disk has at least two curved slots and the fixed disk has at least two slide slots. The at least two positioning rods are engaged with the at least two slide slots and the at least two curved slots. The brake cylinder adjustment assembly uses a single driving unit and single rotation unit to adjust the left and right brake cylinders of different sizes.

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: An apparatus for removing a stud is described. The apparatus includes a housing, a cage and a canted coil spring. The housing has an interior sidewall with a three-lobed cam and a groove. Each lobe has a counterclockwise cam inner surface and a clockwise cam inner surface on the opposite side of the lobe center line. The cage has a top surface, a tapered terminus and a groove disposed between the top surface and the tapered terminus. The cage includes a plurality of jaws, in which the jaw outer cam surface of each jaw interfaces with the cam inner surface of the interior sidewall. The canted coil spring rotatably couples the cage to the housing. During stud removal, the housing rotates counterclockwise relative to the cage and the cage rotates counterclockwise to engage the stud.

Abstract: An adjustable wrench device includes a housing engaged in a head and having an internal gear, a rotary member engaged in the housing, a sleeve attached to the housing and engaged with the rotary member for confining the rotary member in the housing, the sleeve includes an opening having two spirally arranged cam surfaces and having two or more pairs of depressions, two jaw members are engaged with the rotary member and moveable toward and away from each other to engage with either pair of depressions for adjusting the spacing distance between the jaw members and for adjustably gripping bolt heads or nuts or fittings of different sizes or dimensions or diameters.

Abstract: A device for assembling and disassembling an oil filter tank has a clamp module, a base plate, two elbow plates, two restricting elements, and a rotating base. The clamp module has a pair of clamp plates. Each clamp plate has a slipping portion, and the slipping portion has a restricting hole. The base plate is mounted on the clamp plates. The elbow plates are pivotally mounted on the slipping portions respectively. The restricting elements are inserted slidably in the restricting holes respectively and are fixed on the base plate. The rotating base is pivotally mounted on the elbow plates and has an adapter. When the clamp plates are separated from each other, the restricting elements can ensure that the clamp plates move parallelly, such that stability and strength of the device can be enhanced.

Abstract: An adjustable socket including a housing designed on a longitudinal axis, with a series of grooves extending longitudinally along the interior wall. A disc with guide slots intruding obliquely off-center from the perimeter is locked into position within the housing. Jaw members with bottom stems and cams are mounted in the disc guide slots, free to move laterally along fixed paths. An axially rotatable drive core with a cam surface is positioned within the housing, engaging the cam of each jaw. Rotation of the drive core forces the jaws to travel inwardly along the disc guide slots as dictated by the spiraling guide elements of the cam surface, to be forced against a fastener within the jaws. A locking mechanism holds the jaws in position on the fastener. Release of the locking mechanism allows rotation of the drive core in the opposite direction to release the fastener.

Abstract: An adjustable socket that includes a housing, a rotatable member engageable with the housing such that the rotation of the rotatable member causes the housing to move upwardly or downwardly along the longitudinal axis, an adjusting collar engageable with the rotatable member and the housing, a plurality of jaws, a retainer, and a lock member. Each jaw is received in a corresponding one of apertures of the housing. The lock member is operatively connected with the rotatable member and is constructed and arranged to secure the adjusting collar to the housing and the plurality of jaws. The jaws are movable towards and away from the longitudinal axis of the housing through a range of positions upon the rotation of the rotatable member.

Abstract: A wrench drive socket having jaws, actuated by a cam mechanism, facilitating the accommodation of a range of faceted work pieces is provided wherein adjustment of the distance between the jaws having V-shaped grips is accomplished by rotation of a knurled adjustment collar circumferentially disposed around a socket sleeve and fixed to an internally positioned jaw guide, the rotation of the jaw guide selectably positioning cam followers on the jaws against arch shaped cam profiles fashioned along the inside circumference of the socket sleeve, the sleeve being fixed to a centrally disposed socket body having an engaging hole to receive a drive shaft of a wrench such as a ratchet wrench. The adjustable drive socket provides advantages over the prior art including simplified construction, convenience of use, durability, effectiveness, and cost and weight reduction through the elimination of a plurality of sockets having fixed sizes.

Abstract: An adjustable socket including a housing designed on a longitudinal axis, with a series of grooves extending longitudinally along the interior wall. A disc with guide slots intruding obliquely off-center from the perimeter is locked into position within the housing. Jaw members with bottom stems and cams are mounted in the disc guide slots, free to move laterally along fixed paths. An axially rotatable drive core with a cam surface is positioned within the housing, engaging the cam of each jaw. Rotation of the drive core forces the jaws to travel inwardly along the disc guide slots as dictated by the spiraling guide elements of the cam surface, to be forced against a fastener within the jaws. A locking mechanism holds the jaws in position on the fastener. Release of the locking mechanism allows rotation of the drive core in the opposite direction to release the fastener.

Abstract: A device for assembling and disassembling an oil filter tank has a clamp module, a base plate, two elbow plates, two restricting elements, and a rotating base. The clamp module has a pair of clamp plates. Each clamp plate has a slipping portion, and the slipping portion has a restricting hole. The base plate is mounted on the clamp plates. The elbow plates are pivotally mounted on the slipping portions respectively. The restricting elements are inserted slidably in the restricting holes respectively and are fixed on the base plate. The rotating base is pivotally mounted on the elbow plates and has an adapter. When the clamp plates are separated from each other, the restricting elements can ensure that the clamp plates move parallelly, such that stability and strength of the device can be enhanced.

Abstract: An adjustable socket structure contains a body including a first groove, a second groove, a first notch, a number of slots; a plurality of paws, each including a sliding block, and the sliding block including a first hole; a number of connecting rods, each being movably fixed in the second groove and including a first axial shank and a second axial shank; a driving shaft including an axial portion and a disk portion, wherein the axial portion includes a square bore, and the disk portion is rotated in the first groove and includes an outer diameter larger that the axial portion and three second holes so that the driving shaft is rotated to actuate the paws to move in the slots respectively by using the connecting rods; a helical retaining ring retained in the first notch to abut against a rear end of the disk portion of the driving shaft.

Abstract: A wrench comprises a handle connected to a housing. A socket is rotatably supported in the housing for ratcheting movement relative to the housing. A retaining member releasably secures a device in the socket. A retainer is supported on the housing and is movable between a first position and a second position. The retainer, when in the first position, at least partially overlays the socket. A plurality of guides orient a member relative to the socket. The guides are mounted in a rotatable body. A first handle is permanently connected to the housing and a second handle is removably connected to the housing.

Abstract: An adjustable clamping tool of the present invention includes a rotatable disc, two clamp portions, two slidable shanks, two rails and a housing member. When the rotatable disc is turned, the clamp portions are therefore driven to move toward or away from each other along the rails.

Abstract: A wrench comprises a handle connected to a housing. A socket is rotatably supported in the housing for ratcheting movement relative to the housing. A retaining member releasably secures a device in the socket. A retainer is supported on the housing and is movable between a first position and a second position. The retainer, when in the first position, at least partially overlays the socket. A plurality of guides orient a member relative to the socket. The guides are mounted in a rotatable body. A first handle is permanently connected to the housing and a second handle is removably connected to the housing.

Abstract: A self-energizing and de-energizing adjustable gripping tool for engaging a work piece to impart work thereto includes a first element and second element connected for relative movement. The second element includes an actuation portion having a plurality of slots. The first element includes gripping elements which are each associated with a force transfer element which engages one of the slots such that movement of the second element relative to the first element actuates the gripping elements to engage the work piece.

Abstract: An adjustable socket having a housing with a longitudinal axis. A collar is couplable to and movable along the housing. The collar's lower end is bevelled. A plurality of circumferentially spaced apertures extend through the housing. A jaw is mounted in each aperture for slidable, radial movement through the aperture. Each jaw has a flat inward face and a bevelled outward face. The jaws are biased radially outwardly away from the axis. Rotation of the collar around the housing in a first direction forces the collar's bevelled end against the jaws' bevelled faces, forcing the jaws radially inwardly and forcing their inward faces against a fastener located between the inward faces. Rotation of the collar in the opposite direction allows the jaws to be biased radially outwardly to release the fastener.

Abstract: An adjustable clamping tool of the present invention includes a rotatable disc, two clamp portions, two slidable shanks, two rails and a housing member. When the rotatable disc is turned, the clamp portions are therefore driven to move toward or away from each other along the rails.

Abstract: An adjustable socket includes a base having a channel for slidably attaching or engaging with two pawls which may slide relative to the base for adjusting the spacing distance between the pawls and for adjustably receiving and engaging with fasteners or tool members of different dimensions between the pawls and for allowing the tool members of different dimensions to be selectively rotated by the pawls and the base, and a retaining sleeve or device may be rotatably attached to the base and may retain the pawls at the adjusted spacing distance for allowing the tool members of different dimensions to be stably retained or engaged between the pawls.

Abstract: Assemblies and methods are provided for use in coupling a component to an actuator, where the component includes a stem and a drive nut, and the stem is configured to be rotated by the actuator and to move linearly through an opening in the drive nut. In an embodiment, the assembly includes a coupling mechanism, a drive ring, and a carrier, where the coupling mechanism and the carrier each include slots and the drive ring includes projections that correspond with the slots.

Abstract: The invention is a wrench with jaws adjusted by a cam mechanism and a ratchet mechanism providing a free return stroke of the handle, a simplified construction, convenience of use, durability, effectiveness, and cost and weight reduction; comprising a handle with housing, annular control and adjusting discs, a plurality of radial guide slots in the adjusting disc and cam features in the control disc, a plurality of jaws in the housing, each jaw, having a slider spring loaded, is positioned in said guide slots, and a cam follower interacting with cam features formed on the inner edge of the control disc; radial guide slots on the surface of the adjusting disc facing the control disc, each guide slot limited by the inner arch-shaped edge of the adjusting disc and open on its periphery; cam followers and profiles provide wedging to the rotation of the discs during the return stroke.

Abstract: An open ended adjustable clamping device useful as a wrench comprised of a supported jaw movably attached to a supporting jaw. Attached to one or both jaws is an additional sliding jaw movable along a separate axis and driven either simultaneously in a synchronized relationship with the movement of the supported jaw or by a separate unsynchronized movement in order to close upon a hexagonal fastener from two axes. Each jaw has two clamping faces configured to match two sides of a hexagon. Each jaw is positioned in relationship to one another in order to form a hexagon. The two axis movement is driven by a single application of force by the user and may transmitted from one jaw to the next by a system of ramps and wedges or other transmission means capable of maintaining the correct ratio of movement so as to maintain the geometric relationship of the jaws. Alternatively the user applied force may be used to cause movement along one axis first, and then redirected to mobilize jaws along a second axis.

Abstract: A toothless adjustable spanner includes a handle, a head at one end of the handle; a fixing jaw extending from the head; the head being formed with a sliding groove and a receiving groove in the head and communicated to the sliding groove; a sliding rod being received in the sliding groove and installed below a movable jaw; the movable jaw being installed in the sliding groove; the sliding rod has an inclined lower surface; at least one rolling rod being installed in the receiving groove; an elastic unit resisting against rolling rod toward the movable jaw so that the rolling rod resists against the inclined lower side of the sliding rod; at least one driving sheet installed at one outer side of an opening of the receiving groove; and the sliding rod being installed to the driving sheets so that the sliding rod moves as the driving sheets move.

Abstract: A multistage socket including a main body having a disc section. Multiple fixing blocks are disposed on one face of the disc section at equal angular intervals. A movable block is arranged between each two adjacent fixing blocks. The inner end faces of the movable blocks facing the center of the disc section define a polygonal hole. The movable blocks are resiliently movable toward or away from the center of the disc section. A rotary member is rotatably fitted around the disc section of the main body. Multiple arced guide sections are symmetrically formed on an inner face of the rotary member corresponding to the movable blocks. Each arced guide section has multiple recessed arced faces with different thickness. When rotating the rotary member, the outer ends of the movable blocks can abut against the opposite recessed arced faces of the arced guide sections with the same thickness.

Abstract: A tool for operating a subterranean utility valve having limited accessibility includes a hollow housing with a plurality of elongated members mounted for sliding movement within the housing. Each elongated member is movable in a direction away from the first open end of the housing for placement about a valve nut of such utility valve. A handle is connected to the housing for biasing elongated members for engagement with such valve nut and for generating a torque enabling rotation of such valve nut in order to control flow through such utility valve. A rigid member is connected to plurality of elongated members for retaining and remotely moving them within the hollow housing.

Abstract: An adjustable socket having first and second jaw members having manually selectable sizes. An exterior drive unit and a moveable inner driver unit each having serrated interlocking teeth are positioned to either engage during wrenching, or to be disengaged for socket size manual adjustments. The opposing first and second jaw members are forced by axial rotation of a spiral cam element located on the open top end of the outer drive unit to move laterally, inward or outward, when a user pulls the inner driver unit in a first direction and rotates the inner drive unit such that the first and second jaw members are positioned to engage a selected fastener head.

Abstract: An adjustable socket having first and second jaw members having manually selectable sizes. An exterior drive unit and a moveable inner driver unit each having serrated interlocking teeth are positioned to either engage during wrenching, or to be disengaged for socket size manual adjustments. The opposing first and second jaw members are forced by axial rotation of a spiral cam element located on the open top end of the outer drive unit to move laterally, inward or outward, when a user pulls the inner driver unit in a first direction and rotates the inner drive unit such that the first and second jaw members are positioned to engage a selected fastener head.

Abstract: The adjustable wrench has two wrench elements each having a jaw portion and a body portion, each body portion having angled tongues and grooves, slideably mounted opposite one another with the jaw portions opposing each other. Between the two body portions is an actuator having two sides. Each side has angled tongues and grooves corresponding to and slideably engaging the angled tongues and grooves of each of the body portions. The actuator moves along a longitudinal axis of the handle thereby urging the wrench elements and jaws towards and away from one another depending on the direction of movement of the actuator, by interaction of the inclined grooves, acting as wedges using the inclined plane principle.

Abstract: An adjustable wrench includes a fixed body having a first end formed with a fixed jaw, a mediate portion formed with a mounting portion and a second end formed with a receiving recess, and a movable body movably mounted on the fixed body and having a first end formed with a movable jaw facing the fixed jaw and a second end formed with a mounting edge slidably mounted on the mounting portion. Thus, the fixed body has a substantially H-shaped mounting portion, and the movable body has a substantially C-shaped mounting edge slidably mounted on the mounting portion of the fixed body, so that the movable body is mounted on the fixed body rigidly and stably.

Abstract: The automatically adjusting gripping device grips a workpiece ever more tightly as greater torque is applied thereto. The device has a base plate having a linear guide slot or series of radial guide slots, with a pair of jaws residing in each slot. A torque application component rotates relative to the base plate, and has a cam track of varying diameter in which the heads of the jaws ride. Rotation of the torque application component and cam track relative to the base plate causes the jaw heads to slide along the track due to the jaws being captured within the base plate slot, thereby changing the span between jaws as the cam track diameter varies at the jaw head locations. The gripping device is useful as an adjustable wrench but may be applied to other environments as well, e.g., as an automatic gripping and releasing device in conveyor systems, etc.

Abstract: An adaptor to mate with a hand tool such as a folding multipurpose tool to make use of the multipurpose tool as a handle to turn tool bits of various sizes, such as screwdrivers or small socket wrenches. The adaptor includes a drive plate which mates with the hand tool, and a tool bit-engaging member attached to the drive plate and movable angularly between various positions, with a latch to keep the tool bit-engaging member in a selected position. A pair of arms of the drive plate engage the sides of the jaws of one type of multipurpose tool to locate the adaptor as required with respect to the multipurpose tool.

Abstract: The ratchet wrench of this invention includes a jaw adjustment assembly connected with a jaw and gear assembly carried by a wrench head. Components of the jaw adjustment assembly include a scroll plate inside a cap operated by a jaw adjustment disk located above the cap. The jaw adjuster disk is connected with the scroll plate using a snap ring. Components of the jaw and gear assembly include a pair of jaws supported and guided inside a gear unit with the aid of parallel support rails. The support rails connect the rear unit with the jaws and support the jaw and gear assembly from a wrench head and handle. The two assemblies are pressed and held together by a splined inner surface of the cap interfacing with a splined outer surface of the gear unit. A typical pawl assembly provides the ratchet operation of the ratchet wrench.

Abstract: A detachment device of the engine oil filter of an automobile includes a base, two toggle plates, two clamping plates, and two link mechanisms. The clamping plates are connected by the link mechanisms which cannot be returned automatically, so that the user needs not to exert a large force to pull and push the two clamping plates, thereby facilitating the user's operation. In addition, each connecting portion has a width different from the diameter of the base, thereby forming a gap between the base and each connecting portion, so that the user can clearly watch the present position of the engine oil filter, thereby facilitating the user mounting and detaching the engine oil filter.

Abstract: The present invention is an adjustable sleeve barrel structure comprising of a sleeve head, a sleeve body, and a set of pawls. The sleeve head is coupled on the bottom with the sleeve body, and both of them can rotate freely. The sleeve body has multiple slide rails distributed on its inner wall evenly The pawls slide in these slide rails, and the shafts on the top of these pawls extrude to the space designed between the sleeve head and the sleeve body. Connected to the shafts are corresponding connecting rods, which have corresponding pins fixed onto the sleeve head. When the sleeve head rotates, it drives the pawls through the connecting rods to open/close simultaneously. In this way, when the operator turn the sleeve barrel clockwise/anti-clockwise, the pawls will screw a nut down/up together, which is convenient and practical.

Abstract: The present invention is an adjustable sleeve barrel structure comprising of a sleeve head, a sleeve body, and a set of pawls. The sleeve head is coupled on the bottom with the sleeve body, and both of them can rotate freely. The sleeve body has multiple slide rails distributed on its inner wall evenly. The pawls slide in these slide rails, and the shafts on the top of these pawls extrude to the space designed between the sleeve head and the sleeve body. Connected to the shafts are corresponding connecting rods, which have corresponding pins fixed onto the sleeve head. When the sleeve head rotates, it drives the pawls through the connecting rods to open/close simultaneously. In this way, when the operator turn the sleeve barrel clockwise/anti-clockwise, the pawls will screw a nut down/up together, which is convenient and practical.

Abstract: A socket and/or insert (6) for accommodating a fastener head is inserted in a screwing attachment (1). The socket and/or insert (6) comprises two jaws (4, 5) which engage in a tubular holder (3) in which they are locked against rotation. The jaws can slide in axial direction relative to the holder (3). In their one end position, the jaws (4, 5) can be forced apart in radial direction for insertion of a fastener head. Under the effect of axial force in the direction of the arrow (23), the jaws (4, 5) are pressed into the holder (3), whereby the jaws are necessarily squeezed toward each other in radial direction by virtue of the tapered camming faces (12, 13), so that the inserted fastener head becomes firmly clamped.

Abstract: The present invention is an adjustable head wrench which may be attached to a manual drive mechanism or a power drive mechanism. It includes an attachment feature for connecting it to the drive and has a main body which contains three symmetrically arranged jaws. These three jaws each have two adjacent gripping surfaces which form an angle of about 120° to accommodate corners and adjacent surfaces of a hexagonal fastener, such as a hex screw, bolt or nut. The three jaws open and close by rotation and counter-rotation of an adjuster.