Abstract: A low-friction hub assembly for pivotally connecting a pair of scissors or lever-like members employs a pair of cooperative hub members. A first hub member has an exterior threaded surface which threadably engages with an interior threaded surface of the second hub member. Each of the hub members has annular shoulders which engage against opposed annular surfaces of surrounding aligned pivot openings of the scissors. A locking member comprising a pair of opposed pawls engages a serrated surface to lock the subassembly. A throughbore extends through the pivot assembly.

Abstract: A hand-held device includes a first member and a second member coupled together by a pivot point such that each member may rotate independently. The hand-held device further comprises a handle on one side of each member and a protrusion on an opposite side of each member. Further, the hand-held device may include counter-torque extensions which extend from each member such that the counter-torque extensions touch when the device is engaged.

Abstract: The present invention provides an opening-closing device including a first component, a second component and a third component. The second component is rotatably connected with the first component, and the third component is rotatably connected with the second component. The present invention further includes a mode switching device for switching operating modes of the opening-closing device. The operating modes include a conventional mode and a labor-saving mode. When the opening-closing device is in the conventional mode, the third component is fixed relative to the second component. When the opening-closing device is in the labor-saving mode, the third component is rotated in the opening direction relative to the second component during opening of the opening-closing device, and the third component is rotated in the closing direction relative to the second component during closing of the opening-closing device.

Abstract: A pair of pliers having two pliers legs that are arranged in a crossing manner, wherein a fixed joint is formed, having a joint pin. The joint pin has a first conical portion that widens towards the outer side, wherein, the pliers leg is assigned a second conical portion which bears on the first conical portion and transitions into a first mouth portion that leads into the outer side of the pliers leg. The joint pin has a second mouth portion which, starting from the outer side of the pliers leg and perpendicularly to a joint axis, overlaps the first mouth portion. The first and second mouth portion, bound a circular clearance between one another, the radial dimension of the clearance corresponding to 0.05 to 0.15 times the radial dimension, measured from the joint axis of the joint pin in the region of the second mouth portion.

Abstract: A therapeutic hand-held exercise device includes a pair of movable members that each define a handle portion and an end effector portion. The movable members are pivotably connected for relative pivotal movement between a first position and a second position. The handle portion of one of the movable members defines at least one flexible member engaging post. The end effector portion of the other movable member defines at least one flexible member engaging post such that the flexible member engaging posts can receive a common flexible member. The flexible member engaging posts are joined via a first common flexible member and other flexible member engaging posts are joined via a second common flexible member. The common flexible members may each exhibit a tensile strength that provides resistance to movement which either differs from or is equal to the tensile strength of the other common flexible member.

Abstract: A joint for a cutting tool includes a bolt with a head in a first end, with a thread in a second end, and with an intermediate section between the first end and the second end, which during attachment of two objects rotatably to each other protrudes trough openings in said objects. A nut is received on the thread. In order to provide an easy solution for adjusting the tension of the joint and at the same time preventing accidental loosening of the joint, the bolt is provided with a cavity. An expansion bolt with a threaded end protrudes into the cavity and expands the second end of the bolt.

Abstract: A nail clipper includes a clipper body with a pair of jaws, a lever configured to move the jaws to cut nail, a thumb ring member rotatably mounted to the lever, the thumb ring member having first and second ring members, each defining an inner opening through which a thumb of the user can be introduced. The nail clipper further includes a connection plate member which is formed unitarily with the first and second ring members into one piece and connecting between the lower portions of the first and second ring members, wherein the connection plate member has a planar upper surface and includes a bore formed vertically there-through, and a fastener is coupled to the bore of the connection plate member and allows the thumb ring member to freely rotate relative to the lever.

Abstract: A gardening shears comprises a first blade (10) and a second blade (20) which are provided with respective hand grips (12, 22), respectively, and are rotatably connected to one another via a pivot connection (13, 23, 30, 41). The pivot connection comprises a pivot bolt (32) passing through respective bores (13, 23) of the first and second blade (10, 20), respectively and secures the blades (10, 20) in axial direction of the pivot bolt (32) to one another. The pivot bolt (32) comprises in its axial direction successive first and second peripheral sections (34, 35), the first peripheral section (34) being rotatably mounted over a limited angular region within the bore (13) of the first blade (10) whereas the second peripheral section being non-rotatably secured within the bore (21) of the second blade.

Abstract: Clipper for lemons and other fruits. The clipper can have a pair of operating arms, a pivot assembly for the operating arms, a lower central open-position abutment mechanism, hand grips with adjustable and alternative left and right-hand strap mounting, and an out-of-the-way abutment arrangement to define a clipper open position. The pivot assembly can include a dust-free rotation structure and an out-of-the-way torsion spring. Gripping handles for clippers and the like are also disclosed.

Abstract: A shear tension device comprising an adjustment screw and a lock wherein the lock is configured to engage with the adjustment screw and maintain tension properly set by the factory in the shears until service of the shears is required.

Abstract: The invention relates to scissors and a sharpening device. The scissors include two blades, each blade having a cutting edge and a back edge which respectively form opposite longitudinal edges of the blade. A pivot connects the two blades for relative movement of the blades between an open condition in which the cutting edge of each blade are apart and a closed condition in which each blade are substantially adjacent and the back edge of each blade projects beyond the cutting edge of the other blade. The blades also include a sharpening condition in which the cutting edge of each of the blades can be sharpened. A biasing means is included for biasing the blades away from the sharpening condition towards the closed condition and/or the open condition. The sharpening device is for scissors including two blades having a cutting edge.

Abstract: Pruners and Toppers have dual mode operation in that the blade is closed with a single squeeze or with multiple squeezes and a rotatable selector selects the desired mode. The blade has a rocker arm with ratchet teeth formed in a window in the arm. The scissor handle has a radius arm which ends in a pawl which can engage the ratchet nearer the pivot axis of the blade or further from it.

Abstract: A garden shears has a first shear, a second shear and two joined pressing arms. The first shear has a handle portion, and a positioned first pivot hole and an first eccentric pivot hole. The second shear has an elliptical second pivot hole, and a sidewall of the second pivot hole has a limiting surface. A sliding slot is disposed on the second shear, and a limiting indentation is disposed along an outer sidewall between the second pivot hole and the sliding slot, with a second cutting portion extending from an upper section of the second shear. The two joined pressing arms respectively have a connecting rod at a lower section and an Z-shaped upper section; an elliptical engaging pivot hole is disposed on each arm, and a third pivot hole is disposed at the upper section and used to be engaged with a first spacer.

Abstract: An adjustment device for manual cutting tools is provided. The cutting tool for which the device is intended takes the form of pruning shears having two arms with the respective cutting blades thereof hinged to one another by a transverse bolt forming the main element of the device. A tightened nut for locking the bolt is provided with a transverse hole into which a lateral locking screw is screwed, thereby enabling the hinge to be adjusted. The nut and the locking screw are positioned in a recess in the cutting blade such that the nut cannot rotate when the bolt is being manipulated using a protrusion of the nut housed in a cavity in the cutting blade. The through-hole provided in the cutting blade for the bolt includes a bushing which enables the bolt to be better adjusted in the hole.

Abstract: An electric pruner includes a housing, a motor accommodated within the housing, a transmission mechanism, a movable blade, and a fixed blade extending from the front end of the housing. The fixed blade is fixedly mounted on the housing, and the movable blade is rotatably connected to the fixed blade via a shaft and driven by the motor via the transmission mechanism. A groove is formed on the movable blade and comprises a first and a second groove portion, the size of the first portion being greater than that of the second portion. The shaft comprises a first mating portion and a second mating portion, and is movable between a first position and a second releasing the movable blade when the shaft is in the second position. Thus, the replacement of the movable blade is very simple and convenient.

Abstract: An electric pruner includes a housing, a motor accommodated within the housing, a transmission mechanism, a movable blade, and a fixed blade extending from the front end of the housing. The fixed blade is fixedly mounted on the housing, and the movable blade is rotatably connected to the fixed blade via a shaft and driven by the motor via the transmission mechanism. A locking device manually operable by the user is arranged n the shaft for locking the movable blade, the locking device being switchable between a first position where the movable blade is locked to stay connected with the transmission mechanism and a second position where the movable blade is releasable from the transmission mechanism. Thus, the replacement of the movable blade is very simple and convenient.

Abstract: A power cutter tool for applying drywall tape or plastic drywall trim product that contains a powered blade that can cut the tape or trim material by simply pressing a trigger. The cutter can be powered by a spring or springs, a motor, hydraulically or by any other means. The trigger can be a button, lever, valve or any other means for releasing a powered blade.

Abstract: Precision tool and process for making the same. The tool includes two prongs adapted to be associated with each other. Each prong (2, 2?) including a grip portion (4, 4?) and a cutting or bending portion (5, 5?). Each prong (2, 2?) is associated with the other prong so as to move the cutting or bending portion from a working position, in which the cutting or bending portions (5, 5?) contact each other, to a rest position, in which the cutting or bending portions are spaced apart from each other at at least one section thereof. Each cutting or bending portion includes at least one support portion (3, 3?) and at least one operating portion (7, 7?). Each operating portion includes at least one cutting blade or bending portion. Coupling elements are present for removably coupling at least one operating portion with at least one support portion.

Abstract: A pivoting hand tool is provided including handle structures which control the relative angular position of pivotable arms to allow disassembly and reassembly and to prevent accidental disassembly during use. Handle structures includes an elastic interference portion which provides a first interference between the first arm and second arm at the predetermined angle to prevent angular displacement of the arms from exceeding a first predetermined angle until a disassembly pivoting force is applied to the first arm and the second arm.

Abstract: A cutting tool and method comprises a first lever having a first jaw at one end. A second lever is connected to the first lever at a first pivot where the second lever has a second jaw that is opposed to the first jaw. A third lever is connected to the first lever at a second pivot and connected to the second lever at a third pivot such that relative movement of the third lever relative to the first lever between an open position and a closed position defines a stroke of the tool that corresponds to movement of the hand contact points on the levers toward one another. The third pivot comprises a pin engaging a cam surface where the cam surface has a shape such that the mechanical advantage may increase and decrease through the stroke of the tool and may be variable through the stroke of the jaws.

Abstract: A compound leverage hand tool with an interchangeable tool head. The tool includes a pair of pivotably interconnected handles and a tool head defined by a pair of pivotably interconnected blade members. Each blade member terminates at one end in a mounting dowel that is pivotably mounted in a pair of retention slots in one of the handles. Tool head latches are pivotably mounted to the handles and include locking fingers that extend over the retention slots. The tool head latches can be pivoted relative to the handles between a locked position, wherein the locking fingers prevent the mounting dowels from being removed from the handles, and an unlocked position, wherein the mounting dowels can be removed from the handles. A spring biases the tool head latches toward the locked position. To unlock the tool head latches and remove the tool head, a user engages a tool head latch and pulls the handles apart.

Abstract: The present invention discloses a long reach pruner using movements and engagements of a blade unit, a first connection device, a second connection device, and an adjust device to adjust the swing range of the blade unit. The adjust device has a rotation element connected to a first press-fit element having a male thread on the surface thereof. When the rotation element is rotated downward, the male thread is driven to screw into a female thread of the first connection device and then fixed there; meanwhile, ratchet teeth of the first connection device engage with a ratchet of the second connection device. When the rotation element is rotated upward, the male thread is driven to screw out from the female thread and then fixed there; meanwhile, the ratchet teeth is separated from the ratchet. Thereby, the swing angle of the blade unit is adjusted and then fixed.

Abstract: A hydraulic rescue tool (10) with a quick-change head (26) that incorporates a cylinder (20) having a piston rod (22) and a forward end structure (24). The forward end structure (24) has a separable head and a cylinder attaching bifurcated yoke (28). A pair of yoke quick release pins (48) jointly engage the head (26) and the bifurcated yoke (28) thus, creating an attachment therebetween. A pair of cutting blades (50) are connected to the head (26), and links (54) connect to the piston rod on a first end and to the cutting blades (50) on a second end, thereby forcing the cutting blades from an open position to a closed position by movement of the piston rod (22). A pair of link quick release pins (60) engage the links (54), creating an attachment therebetween, permitting the links to be released by manually disengaging the quick release pins, thereby allowing the head, including the cutting blades, to be rapidly removed or repaired.

Abstract: A pair of scissors has first and second cutting panels operationally interconnected with both pins and pin guide slot\s so that the first and second cutting edges of these panels simultaneously pivot and slide longitudinally when closing together onto an item to be cut to enhance the effectiveness of the cutting action.

Abstract: A power tool has a drive motor and first and second tool members driven reciprocatingly by the drive motor in opposite directions, respectively. The first tool member is driven by a first connecting rod and the first connecting rod is connected to the first tool member by a first pivot joint arranged on the first connecting rod. The second tool member is driven by a second connecting rod and the second connecting rod is connected to the second tool member by a second pivot joint arranged on the second connecting rod. The first pivot joint is arranged on an end of the first connecting rod which end is facing the tool members. The second pivot joint is arranged on an end of the second connecting rod which end is facing away from the tool members.

Abstract: A pruner has a movable handle/blade assembly pivotally coupled to a static handle/blade assembly by a pivot assembly carried by the static handle. The pivot assembly further has a bush within the static handle and on which the movable handle/blade assembly is pivotally mounted, a spring for pivotally biasing the movable handle/blade assembly to an open position being retained by the pivot assembly within the static handle. Both the movable blade and static blade are mounted on the bush and are clamped laterally between two separate parts of the bush which are assembled together in screw threaded engagement, and the two blades are supported from the bush by a bearing ring of low friction material.

Abstract: A pair of gardening shears include two cutting blades pivotally connected with each other, two movable members each having a first side mounted on a respective cutting blade, two fixing members each mounted on a second side of a respective movable member, two locking bolts each extended through the fixing members, the movable members and the cutting blades, and two locking nuts each screwed onto a respective locking bolt. Thus, the cutting blades are limited by the fixing members and the locking bolts so that the cutting blades are juxtaposed to each other closely without producing a gap between the cutting blades, thereby facilitating a user operating the gardening shears.

Abstract: An instrument having two branches such as a pair of scissors, or the like. The two branches thereof are connected with a coupling element, which is attached to one of the branches and extends through a hole in the other branch. The coupling element has a locking body situated on the outside of the other branch. Both the locking body and the hole are out of round so that the locking body can be brought through the hole in a certain angular position but not in another. According to the invention, the coupling element is screwed into the first branch. Furthermore, the locking body has a shape that is adapted in such a way to the shape of the hole that the coupling element can be turned by means of the second branch.

Abstract: Scissors (1) having a first lever (2) and a second lever (2?) provided with respective coaxial holes (25, 25?) in their central portions (20, 20?) and a rivet (4) disposed in the holes (25, 25?) of the levers (2, 2?). The scissors further include a bush (3) interposed between the rivet (4) and the surface of the hole (25) of the first lever (2) so that the first lever (2) can rotate with respect to the bush (3) which is maintained integral with the rivet (4), and a washer (5) interposed between the rivet (4) and the surface of the hole (25?) of the second lever (2?), so that the outward deformation of a portion (42) of the rivet (4) compresses the washer (5) on the central part (20?) of the second lever, making the second lever (2?) integral with the rivet (4).

Abstract: Surgical and hairdressing scissors having an adjustable, articulated thumb ringlet rotatably connected to a handle by a flexible pin.

Abstract: A pair of improved scissors is provided herein, which separates the blades and handles of the pair of scissors into individual parts. These parts are joined at the pivot point by a locking mechanism. By adjusting the locking mechanism, the included angle between the blades and handles of the pair of scissors can be varied easily in accordance the requirement of the application. In addition, with the present invention, the handles can also be replaced by those that are safer and more comfortable to operate. As such, the stress and burden of the user's fingers and wrist can be relieved in operating the pair of scissors.

Abstract: Scissors (1) having a first lever (2) and a second lever (2?) provided with respective coaxial holes (25, 25?) in their central portions (20, 20?) and a rivet (4) disposed in the holes (25, 25?) of the levers (2, 2?). The scissors further include a bush (3) interposed between the rivet (4) and the surface of the hole (25) of the first lever (2) so that the first lever (2) can rotate with respect to the bush (3) which is maintained integral with the rivet (4), and a washer (5) interposed between the rivet (4) and the surface of the hole (25?) of the second lever (2?), so that the outward deformation of a portion (42) of the rivet (4) compresses the washer (5) on the central part (20?) of the second lever, making the second lever (2?) integral with the rivet (4).

Abstract: A pair of scissors includes two scissor elements and a pivotal device. Each scissor element includes a countersink extending from a first side thereof through a second side thereof. The pivotal device includes a screw and a nut. The screw includes a threaded shank and an enlarged head. The nut includes a non-circular shank and an enlarged head, with a screw hole extending through the non-circular shank and the enlarged head of the nut. The nut is received in the countersink of one of the scissor elements, with the non-circular shank of the nut extending into a non-circular countersink of the other scissor element. The threaded shank of the screw is threadedly engaged with the screw hole of the nut. Thus, the contact area between the screw and the pivotable scissor elements is small.

Abstract: A pair of scissors includes two scissor elements and a pivotal device. Each scissor element includes a countersink extending from a first side thereof through a second side thereof. The pivotal device includes a screw and a nut. The screw includes a threaded shank and an enlarged head. The nut includes a shank and an enlarged head, with a screw hole extending through the shank and the enlarged head of the nut. The nut is received in the countersink of one of the scissor elements, with the shank of the nut extending into the countersink of the other scissor element. The threaded shank of the screw is threadedly engaged with the screw hole of the nut. Thus, the contact area between the screw and the pivotable scissor elements is relatively small.

Abstract: A method and apparatus for providing protection in connection with the cutting edge of a blade of a generally Y-shaped conventional kitchen peeler or cutter comprising a guard pivotally attached to the extension arms extending from the handle of the peeler, whereby the guard is pivotal between a guarding position immediately adjacent the cutting edge of the peeler blade and a non-guarding position exposing the cutting edge of the peeler blade for use.

Abstract: A pivoted hand tool including a first and second handle, each handle having a jaw member extending therefrom. A pivot connects the first and second handles. A ratchet is operatively engaged with the pivot and at least one of the handles and selectively rotates the pivot in a clockwise and counter-clockwise direction by movement of the handles toward or away from one another.

Abstract: A pair of looping shears for gardening purpose to allow its user the optimal cutting angle while trimming twigs, comprised of strike jaw, blade jaw and effort-saving mechanism; within, a ratchet is provided to a pivot of the blade jaw that synchronously turns with the strike jaw, and a mobile tab engaged with the ratchet and the handle of the blade jaw to achieve comfortable grip on the handles at an optimal angle for applying the force to repeat trimming twigs and branches.

Abstract: A cutting tool such as a pair of scissors including two main cutting bodies that have blade portions and connected so as to pivot relative to each other about a pivot shaft. A spring is disposed in a space formed by the recessed portions formed in inside surfaces of the main cutting bodies so as to surround shaft holes of the main cutting bodies. The spring has two operating ends each acting on some point inside the separate recessed portion of each one of the main cutting bodies so as to apply a driving force that opens the blade portions.

Abstract: A hand-held power-operated blade-actuating or other work member actuating device, especially useful as shears for processing comestible products such as fowl. A servo mechanism and linkage connected with a movable blade and a finger control causes controlled powered movement of the blade in coordination with the finger control. A fixed blade and a pivoted blade are insertable and removable as a unit from a hand-held frame in which the fixed blade is restrained against rotation relative to the frame. The blades and frame are constructed so the blades are insertable or removable only when closed. In a preferred embodiment the fixed blade is retained in part by two load bearing pins extending from the frame and located substantially diametrically opposite each other relative to the pivot axis of the movable blade.

Abstract: A pair of scissors, in particular haircutting scissors, has a hinged joint consisting of a hinge screw (3) and a screw nut (4). The hinge screw (3) is essentially non-rotatably connected to one scissors half (2) and the screw nut (4) engages in a bore (12) in this scissors half (2). Situated in said bore (12) is a first flexible body (15) which, under contact pressure, sits against the end of the screw nut (4) facing the head (5) of the hinge screw (3) and against the shaft (9) of the hinge screw (3). To ensure that even a short screw nut will be securely held and can be precisely adjusted, the invention provides that the screw nut (4) has on its outer circumference a groove (18) in which is situated a second flexible body (19) which, under contact pressure, sits against the screw nut (4) and the bore (12) in the scissors half (2).

Abstract: A hand-held power-operated blade-actuating or other work member actuating device, especially useful as shears for processing comestible products such as fowl. A servo mechanism and linkage connected with a movable blade and a finger control causes controlled powered movement of the blade in coordination with the finger control. A fixed blade and a pivoted blade are insertable and removable as a unit from a hand-held frame in which the fixed blade is restrained against rotation relative to the frame. The blades and frame are constructed so the blades are insertable or removable only when closed. In a preferred embodiment the fixed blade is retained in part by two load bearing pins extending from the frame and located substantially diametrically opposite each other relative to the pivot axis of the movable blade.

Abstract: An adjustable and releasable fastener for a pivoting hand tool includes a first bushing and a second bushing which are press fit in respective tool elements, the second bushing extending into a hole in the first bushing to form a pivot bearing. The first bushing includes a cap with a recess having a slotted opening connecting to the hole in the first bushing. A bolt is extends through the first and second bushings, with a bolt head disposed in the recess. A nut is fastened to a threaded end on the second bushing side. The nut can be tightened or loosened to adjust the tension on the bolt. The bolt head is shaped to allow it to pass through the slotted opening in the first bushing when the tool elements are pivoted beyond an operating range, permitting quick release of the tool elements.

Abstract: An improved scissors includes a pivot joint having a pivot axis, a first blade member having a first cutting edge and a longitudinal axis, and a second blade member having a second cutting edge. The second blade member is pivotally coupled by the pivot joint to the first blade member with the first cutting edge adjacent and in contact with the second cutting edge. Moreover, the pivot joint is coupled to the first blade member to incline the first blade member relative to the second blade member and the pivot joint, so that the inclination of the first blade member produces a load transverse to the pivot axis of the pivot joint, which corresponds to the direction along the longitudinal axis of the first blade member to produce and determine the tension and friction along the cutting edges. Further, the first blade member may also include a first ride area, and the second blade member may also include a second ride area, so that the first ride area is spaced from and free of contact with the second ride area.

Abstract: A scissors includes a pivot joint having a pivot axis, a first blade member and a second blade member. The first blade member has a first cutting edge, a longitudinal axis, and a pivot joint hole. The pivot joint hole being inclined at least 1.0 degree relative to a line perpendicular to the longitudinal axis (which corresponds to an angle "a" of 89.0 degrees or less with respect to the longitudinal axis) in a direction along the longitudinal axis of the first blade member, and is shaped to hold the pivot joint in a fixed inclination. The second blade member has a second cutting edge, and is pivotally coupled by the pivot joint to the first blade member with the first cutting edge adjacent to the second cutting edge. The pivot joint is also coupled to the first blade member through the pivot joint hole in the first blade member, and the pivot joint is maintained in a fixed inclined orientation relative to the direction along the longitudinal axis of the first blade member.

Abstract: There is disclosed a bearing (4) usable for scissors, including a disk-shaped holding plate (44) and a plurality of steel balls (4). The holding plate (44) is provided with a plurality of steel ball holding apertures (41) for rotatably holding the steel balls (40) under a condition where the spherical surface of each steel ball (40) is projected beyond either side of the holding plate (44); and, at a peripheral edge portion of each steel ball holding aperture (41), and at an outer peripheral edge portion of the holding plate (44), foreign material blocking barriers (42, 43) are respectively formed taken along the entire peripheral edge portions so as to each have a height lower than the height of the projecting portion of each steel ball (40).

Abstract: An improved cutting tool, such as scissors, shears, and the like, having two cooperating members that are interconnected so as to be pivotally movable, with respect to each other and about a connection point, between an open position and a closed position. The members each have a handle at their one end, a shank portion disposed between the handle and the connection point, and a blade portion disposed between the connection point and their other end. Each of the shank portions have an inside face, an outside face, and a leading edge that faces the other leading edge when the members are in their open position. A bearing ramp is formed on the inside face of one of the shank portions and has a first end adjacent the leading edge of the one shank portion and a second end away from the leading edge.

Abstract: The present invention relates to hinged tools such as scissors, shears, pruners, or the like, having a force applying end with formed handles and an opposed working end consisting of a pair of blades disposed across a hinged joint through which a force may be transmitted. In these tools the handles, which are formed integrally with the hinge, are provided with ridge support in the form of heel elements to establish suitable contact between the blades.

Abstract: An improved scissors includes a pivot joint having a pivot axis, a first blade member having a first cutting edge and a longitudinal axis, and a second blade member having a second cutting edge. The second blade member is pivotally coupled by the pivot joint to the first blade member with the first cutting edge adjacent and in contact with the second cutting edge. Moreover, the pivot joint is coupled to the first blade member to incline the first blade member relative to the second blade member and the pivot joint, so that the inclination of the first blade member produces a load transverse to the pivot axis of the pivot joint, which corresponds to the direction along the longitudinal axis of the first blade member to produce and determine the tension and friction along the cutting edges. The load transverse to the pivot axis may be oblique to the pivot axis of the pivot joint and may also be inclined between 0.1 to 10.

Abstract: The present invention relates to pivoted tools such as scissors, pliers, shears, and the like. More particularly, this invention is concerned with pivoted tools having a pair of elongated members and a pivotable joint. The pivotable joint comprises a pair of registering apertures cooperating with a self-compensating unitary pivot member. The pivot member, which is formed when the tool is in closed registered configuration, conforms with the apertures and engages the interior surfaces thereof.

Abstract: A hand tool includes first and second lever members which intersect and have aligned openings therethrough in which is received a flexural pivot assembly, including a pair of cylindrical members respectively disposed in the lever member openings and respectively fixed to the lever members for movement therewith. In one embodiment the cylindrical members of the pivot assembly are press fitted directly in the openings of the lever members. In another embodiment, bushings are press-fitted in the openings between the lever members and the cylindrical members. A spacer is disposed between the cylindrical members to prevent their axial movement toward each other, and the spacer may extend between the lever members and has a very low coefficient friction so as not to impede pivotal movement of the levers.