Abstract: Pliers having two pliers legs that cross at a pivot bolt, of which pliers leg is fixed and the other is movable with respect thereto, wherein the pivot bolt is optionally fixable in a longitudinal slot in the fixed pliers leg by toothing engagement in order to set a mouth opening width, by means of engagement teeth formed on the longitudinal slot and one or more mating teeth formed on the pivot bolt. The toothing engagement is releasable by the pivot bolt being pressed down in a first direction of movement and subsequently the pliers legs being moved together, or by the pivot bolt automatically passing over one or more engagement teeth, wherein the pivot bolt moves in a second direction of movement on passing over an engagement tooth.

Abstract: The invention relates to a pair of pliers (1) with two pliers legs (2, 3) crossing at a joint pin (4), one (3) of which legs is movable and the other (2) is fixed, and with a spring (13) between the fixed leg (2) and the joint pin (4) acting in such a way as to support interlocking engagement of the joint pin (4), wherein the pliers legs (2, 3) form gripping portions (5, 6) on one side of the joint pin (4) and a pliers mouth is formed on the other side of the joint pin (4), wherein furthermore the joint pin (4), through which a pivot axis (A) of the movable pliers leg at the same time extends, is adjustable in a longitudinal slot (9) of the fixed pliers leg (2), and wherein the movable pliers leg (3) can be optionally fixed in relation to the fixed pliers leg (2) by means of interlocking engagement between the joint pin (4) and the longitudinal slot (9) that takes place in the direction of a plane defined by the pliers legs (2, 3).

Abstract: A pliers that includes a jaw member removably coupled to a head of the pliers. The jaw member includes a grip surface and a flange including an aperture. The pliers further includes a fastener that extends into the aperture of the flange and an aperture of a longitudinal side of the head to removably couple the jaw member to the head. The jaw member is slidable along the jaw surface of the head from the first longitudinal side toward the second longitudinal side to uncouple the jaw member from the head when the fastener is uncoupled from at least one of the jaw member and the head.

Abstract: A ring pliers can be adjusted to work with internal rings and external rings.

Abstract: Pliers with adjustable jaw span have a first member (1) and a second member (2) which cooperate with each other. A long slot (13) is formed in the first member (1). The second member (2) is connected with the first member (1) by means of a pivot (3) passing through the long slot (13), and rotatable around the pivot (3) relative to the first member (1), while adjusting the span of the jaws by varying the position of the pivot (3) within the long slot (13). The edge of the long slot (13) is provided with ratchet teeth (14). The pivot (3) is engaged with the ratchet teeth (14) by a pawl (31), thus the pivot is movable within the long slot (13) in a first direction and immovable in a second direction which is opposite to the first direction. The pliers are convenient to operate because when the position of the pivot (3) is moved within the long slot (13), the user's operation is required only for the movement in one direction.

Abstract: A hand operated gripping tool includes a movable jaw, a fixed jaw, a first cam associated with the movable jaw, a pivotal handle connected with the movable jaw and a second cam associated with the pivotal handle. The first cam is spaced from the fixed jaw by a first variable distance, and the second cam is spaced from the fixed jaw by a second variable distance, with the first distance maintained greater than the second distance. The jaws are cooperable to define a variable size space for receiving a workpiece and the cams are operable to cause the jaws to grip the workpiece positioned in the variable size space. The cams are arranged such that rotational movement of the second cam caused by operation of the pivotal handle causes the movable jaw to pivot on the first cam to grip the workpiece that is positioned in the variable size space.

Abstract: The invention relates to a pair of pliers (1) with two pliers legs (2, 3) crossing at a joint pin (4), one (3) of which legs is movable and the other (2) is fixed, and with a spring (13) between the fixed leg (2) and the joint pin (4) acting in such a way as to support interlocking engagement of the joint pin (4), wherein the pliers legs (2, 3) form gripping portions (5, 6) on one side of the joint pin (4) and a pliers mouth is formed on the other side of the joint pin (4), wherein furthermore the joint pin (4), through which a pivot axis (A) of the movable pliers leg at the same time extends, is adjustable in a longitudinal slot (9) of the fixed pliers leg (2), and wherein the movable pliers leg (3) can be optionally fixed in relation to the fixed pliers leg (2) by means of interlocking engagement between the joint pin (4) and the longitudinal slot (9) that takes place in the direction of a plane defined by the pliers legs (2, 3).

Abstract: A hand tool for gripping a workpiece can include a first lever having a first handle and a first jaw and a second lever having a second handle and a second jaw. A locking assembly can include a pivoting lever, a locking pin and a blocking member. The pivoting lever can be pivotally coupled to the second lever. The blocking member can be coupled to the first lever. The pivoting lever can be movable between an unlocked position, wherein the first and second jaw move relative to each other and a locked position, wherein the first and second jaws are fixed relative to each other. In the locked position, the locking pin can be wedged against a contact surface of the blocking member precluding relative motion of the blocking member and the pivoting lever.

Abstract: Gripping pliers consisting of a jointed clamp and handle. The clamp contains a longitudinal slot with longitudinal apertures defining first and second detent positions. In the first position, the joint is movable whereas in the second position, the joint is locked. The handle is rotatably mounted on a bearing ring which permits fine adjustment of the opening width of the pliers.

Abstract: A multiple joint pliers having a transversely retaining branch (2), a transversely retained branch (3), and a plate (4). The transversely retaining branch (2) which includes a first jaw (6), a first articulating intermediate zone (9) and a first handle (10). The first articulating zone defines a recess (12), and on either side thereof, a stepped portion (14). The transversely retained branch (3) includes a second jaw (21), a second articulating intermediate zone (23) and a second handle (22). The second articulating zone being received mobile in rotation, and selectively in translation, in the recess. The plate (4) maintaining the second articulating zone in the recess. The ends (27) of the plate are positioned on the respective stepped portions. The plate (4) is generally ?-shaped when viewed laterally.

Abstract: The invention concerns multiple joint pliers comprising: a transversely retaining branch (2) which includes a first jaw (6), a first articulating intermediate zone (9) and a first handle (10), the first articulating zone defining a recess (12), and on either side thereof, a stepped portion (14), a transversely retained branch (3) which includes a second jaw (21), a second articulating intermediate zone (23) and a second handle (22), the second articulating zone being received mobile in rotation, and selectively in translation, in said recess, and a plate (4) maintaining the second articulating zone in said recess, the ends (27) of the plate being positioned on the respective stepped portions. The plate (4) is generally &OHgr;-shaped viewed laterally.

Abstract: The present invention comprises a number of innovations in the design of self-adjusting pliers. A self-adjusting pliers tool formed of laminated sheet metal construction is provided with separately fabricated cast steel jaws that provide improved strength and durability relative to laminated jaws. Techniques are also disclosed for casting the steel jaws and for treating them to achieve improved surface hardness and corrosion resistance. In certain embodiments, the jaw and the jaw end of the laminated handle are designed to interlock to prevent the jaw from sliding out of position. In certain other embodiments, a “self-energizing” feature is provided in which the shape and tooth configuration of the jaw, and the angle of the jaw end of the pliers, cooperate to keep the tool secured to a workpiece even after the upward squeezing force on the lower handle is released.

Abstract: Self-adjusting pliers including first and second members each handle portions and jaw portions. The first member defines a rack having a plurality of teeth. A rack engagement structure is mounted to an intermediate portion of the second member and positioned adjacent the rack. During initial manual movement of the handle portions towards one another, the rack engagement structure travels in disengaged, spaced relation with respect to the rack. Then, after the jaw portions engage opposing sides of a workpiece, continued movement of the handle portions towards one another causes movement of the rack engagement structure toward the rack until the rack engagement structure engages the rack. The rack engagement structure has a movement restrictive portion being cooperable with the rack so as to limit the movement of the rack engagement structure toward the rack when the jaw portions contact one another in the absence of a workpiece therebetween.

Abstract: A pincers including a fixed component, a movable component and a locating mechanism. The fixed component is formed with an elliptic moving recess. A moving member is synchronously moved when a pushing rod of the movable component moves within a slide slot formed in the moving recess. The locating mechanism serves to restrict the moving of the moving member and restrict the moving of the pushing rod so as to fix the distance between the fixed jaw and movable jaw and pitchlessly adjust the pincers.

Abstract: A plier device includes a pair of beams each having a handle and a jaw. One of the beam has a channel formed in the middle portion, the other beam includes a shaft slidably engaged in the channel for allowing the jaws to be widely opened and includes one or more pivotally coupled wheels engaged between the beams for allowing the jaws to be easily and quickly moved toward each other to engage with the object to be clamped. A lever is pivotally coupled to the shaft and has a number of teeth for engaging with a projection of the beam and for allowing the jaws of the beams to be solidly forced toward each other in order to solidly clamp the object.

Abstract: A self-adjusting tool having first and second elongated members, each of which have a workend and an oppositely located handle means for applying force to the tool. The first member includes a raceway positioned intermediate of the work end and handle. A connector is provided adjacent to the work ends for slideably and pivotally connecting the first and second members together. The connector includes an elongated slot in the first member having ratchet teeth along at least a portion of one edge thereof and a pawl positioned to slide within the slot and to pivotally engage the ratchet teeth. A fastener for securing the first and second members slideably together and securing the pawl in the slot is provided as part of the connector. A torsion arm with first and second ends is operably positioned between the first and second members. The first end includes a torsion element connected to the second member and the second end is slideably positioned within the raceway.

Abstract: Self-adjusting pliers for single-handed manual manipulation will automatically adjust to positions of positive gripping and holding of any size workpiece within the size range defined by the maximum opening between the jaw portions of the pliers, which jaw portions respectively extend parallel to jaw portion axes. Upon closure from the maximum opening, parts first undergo a sliding action along an axis until the workpiece is engaged and then a pivoting action. The plier handles have bearing surfaces inclined at angles in predetermined ranges to the sliding axis and to the jaw portion axes to facilitate shifting from the sliding action to the pivoting action.

Abstract: An automatic wrench comprises a high-torque, a low-torque, and a locking device. The wrench control system includes a torque detector and a rotation angle detector, in response to whose signals passing through an AND gate a control unit delivers a command to end the thread tighening by the rotation actuator of the high-torque device in screwing a pipe string together or to end the initial loosening of the thread with the aid of the same actuator in screwing it apart. The control unit incorporates a unit for monitoring the duration of the command execution, which stops operation of the high-torque device if no signal comes from said AND gate during the time alloted to accomplish the tightening or the initial loosening of the thread.

Abstract: The improved slip-type pliers tool includes a pair of jaw members that are arranged to permit pivotal movement therebetween. Mutually engageable surfaces are provided on the jaw members to limit the pivotal movement when the tool is in the closed position, to a position wherein the engaging surfaces on the jaw members are in generally parallel, spaced relationship. The tool also includes a ratchet dog located in a slot in one jaw member. The jaw member having the slot is provided with a series of teeth that mate with teeth provided on the ratchet dog. A cam located in the slot and connected to one of the jaw members is eccentric so that pivotal movement toward the open position of the tool causes the ratchet dog to become disengaged from the teeth on the jaw member permitting sliding adjustment of one jaw member relative to the other to open and close the space between the generally parallel engaging surfaces.

Abstract: A multiple joint pliers having a transversely retaining branch (2), a transversely retained branch (3), and a plate (4). The transversely retaining branch (2) which includes a first jaw (6), a first articulating intermediate zone (9) and a first handle (10). The first articulating zone defines a recess (12), and on either side thereof, a stepped portion (14). The transversely retained branch (3) includes a second jaw (21), a second articulating intermediate zone (23) and a second handle (22). The second articulating zone being received mobile in rotation, and selectively in translation, in the recess. The plate (4) maintaining the second articulating zone in the recess. The ends (27) of the plate are positioned on the respective stepped portions. The plate (4) is generally ?-shaped when viewed laterally.