Abstract: A hand tool includes a first jaw; a first handle coupled to a second jaw, the second jaw pivotably coupled to the first jaw and having a first geared structure, the first geared structure including a first plurality of teeth and a first bearing surface; and, a second handle coupled to a lever, the lever pivotably coupled to the first jaw and including a second geared structure, the second geared structure including a second plurality of teeth and a second bearing surface, wherein the first and second handles are movable between a full open position and a full close position such that during movement from the full open position to the full close position, the first plurality of teeth are at least partially engaged with the second plurality of teeth and the first and second bearing surfaces are in rolling contact.

Abstract: A pair of pruning shears with multi-stage actions for cutting branches with larger diameters is revealed. The pruning shears include a fixing member, a blunt member, a cutting tool, a crank member, a moveable handle, a first locking member, and a second locking member. The fixing member, the crank member and the cutting tool are pivotally connected. The cutting tool consists of a blade part and a curved teeth part. The first locking member and the second locking member are pivotally connected to the fixing member and the crank member respectively. Each locking member is disposed with a hook part, a first projecting rod, and a second projecting rod. The first projecting rod and the second projecting rod are arranged symmetrically. The first locking member and the second locking member are engaged with different teeth respectively at different stages. Thereby the pruning shears performs cutting at different stages.

Abstract: A pruning shears is revealed. The pruning shears include a first brake arm, a second brake arm, a blade, and at least one connection piece. The first brake arm is disposed with a first toothed part while the second brake arm is arranged with a second toothed part. The first toothed part and the second toothed part are engaged with each other. The connection piece is pivotally connected to the blade, the first brake arm, and the second brake arm. During a cutting process (pruning process), a force applied is reduced due to the connection piece pivotally connected to the first brake arm and the second brake arm. While the first and the second toothed parts are engaged with each other, the connection piece becomes a wall of the first and the second toothed parts for stabilizing the engagement of the first and the second toothed parts.

Abstract: Disclosed is an improved pipe cutting tool based upon a ratchet closure action wherein handles are pivotedly attached to allow successive movement of a cutting blade in response to the squeezing of the handles. The handles are also hingedly coupled to the cutting member to maintain the cutting member in a position perpendicular to the tubular item to be cut while allowing the operator to squeeze the handles at offset angles, up to and including a right angle cut. The hinged handles allow for offset operation without forgoing the ease of operation by the consumer or causing a large reduction in the mechanical advantage. A ratchet allows sequential advancement of a cutting member toward a tubular shaped jaw that holds the item to be cut.

Abstract: The invention relates to a manual cutting tool including two jaws each provided with a cutting blade, the two jaws being mounted movable in rotation with respect to a securing system so as to define a closed position and an open position of a cutting area. The tool also includes two cams mounted rotating with respect to the two jaws and each including an aperture, and a bearing surface having a variable curvature, the two bearing surfaces being configured so as to be in permanent connection. The tool includes two connection parts positioned on the axes of rotation of the jaws and configured to connect the cams to the jaws.

Abstract: A lopper includes a first metal plate including a first gear structure and a first elongate extension, a second metal plate including a second gear structure in meshing engagement with said first gear structure and a second elongate extension, a first handle coupled to said first elongate extension, a second handle coupled to said second elongate extension, a link to which each of said first body and said second body is pivotably connected so that said first gear structure and said second gear structure are retained in meshing engagement, a first metal blade member having a first arm portion, a first cutting portion, and a first intermediate portion interposed between said first arm portion and said first cutting portion, and a second metal blade member having a second arm portion, a second cutting portion, and a second intermediate portion interposed between said second arm portion and said second cutting portion.

Abstract: A cutting tool with double compound leverage includes first and second opposed handle levers having handle ends and pivot ends. One of the handle levers includes a double link with a rearward portion defining the handle end and a forward portion defining the pivot end. First and second opposed blade levers each include a jaw end with a cutting blade and a lever end. The blade levers are each pivotally attached intermediate the jaw end and the lever end at spaced apart pivot points to a transverse coupling element. The pivot ends of the handle levers are pivotally attached to the lever ends of the blade levers. First and second compound linkage pivotally couple the handle levers and the blade levers so as to provide complete opening and closing of the cutting jaws.

Abstract: Garden shears that avoid loosening of a shaft pin has shears having overlapped first and second cutting members, the first cutting member and second cutting member respectively connected to a first handle and a second handle. The first and second cutting members are secured with the shaft set. The shaft set has a threaded shaft pin, a washer, a threaded securing member and at least two engaging members. when the shears are assembled with the shaft set, the threaded securing member respectively has one engaging member on each side, and the engaging teeth of the threaded securing member engage with the two engaging members to prevent the threaded securing member from loosening due to the repeated opening and closing movements of the shears, and which can improve the smoothness of the operation of the shears and increase both safety and convenience.

Abstract: Disclosed is an improved pipe cutting tool based upon a ratchet closure action wherein handles are pivotedly attached to allow successive movement of a cutting blade in response to the squeezing of the handles. The handles are also hingedly coupled to the cutting member to maintain the cutting member in a position perpendicular to the tubular item to be cut while allowing the operator to squeeze the handles at offset angles, up to and including a right angle cut. The hinged handles allow for offset operation without forgoing the ease of operation by the consumer or causing a large reduction in the mechanical advantage. A ratchet allows sequential advancement of a cutting member toward a tubular shaped jaw that holds the item to be cut.

Abstract: A multi-function blade-and-anvil type cutting tool that uses standard type razor blades includes a blade-and-anvil section connected to a first handle portion and a non-tool blade holder and a blade clamp assembly connected to a second handle portion. The standard blades are able to be changed with out tools when the first and second handle portions are moved from a first open position to a second open position to allow the blade holder and the clamp assembly to pivot with one another causing a screw and O-ring latch to move away from a latching slot in the second handle portion. This movement positions the razor blade between the screw and O-ring latch and a blade clamp guide element for easy removal. Each handle portion having a gripping cover disposed thereon. One of the handle portions has a sliding storage tray disposed therein for storing replacement razor blades.

Abstract: A garden shears has a main cutting member, a minor cutting member, two applying arms, and two assembling members. The major and minor cutting members both have a first pivot aperture and an extended section. An end of each extended section is bent up to form an L-shaped pawl forming a first indentation; an arced limiting slot is adjacent to each first pivot, and a tool end is respectively formed at an opposite end of the major and minor cutting members. Each applying arm has a handle and an assembling portion, each assembling portion having a second pivot aperture and a second indentation. A top edge of each second indentation has driving teeth that respectively engage with the L-shaped pawls of the major and minor cutting members. Each assembling member has a third pivot aperture and two fourth pivot apertures corresponding to the first pivot apertures and the second pivot apertures.

Abstract: A collapsible bolt cutter includes compound levers a first lever of which includes elongate handles and a second lever of which includes cutting jaws for transmitting a force applied to the handles to the cutting jaws with a mechanical advantage when the handles are urged to move towards each other. The handles are each split along their length to form free handle portions articulated to the second levers. Locks or latches a provided for selectively locking the handle portions in the aligned operative positions during normal use while being manually releasable to release the free handle portions to allow the free handle portions to be pivoted to a second folded position when not in use and for storage.

Abstract: A pair of gardening shears include a main cutter, a secondary cutter pivotally connected with the main cutter, a force arm pivotally connected with the main cutter and engaged with the secondary cutter to drive the secondary cutter to pivot relative to the main cutter, and a connecting plate mounted on the secondary cutter and the force arm. Thus, the secondary cutter and the force arm are sandwiched between the main cutter and the connecting plate so that the secondary cutter and the force arm are moved smoothly and stably by limit of the main cutter and the connecting plate so as to facilitate the user performing the pruning action.

Abstract: A garden shears has a first shear, a second shear, a separator, an engaging member and two joined pressing arms. A cutting portion of the first shear is offset from the handle portion, and central portion has a centrally positioned first pivot hole and a first eccentric pivot hole. A central portion of the second shear has a second pivot hole. A side of the second shear has a strip-shaped extending portion with an end bent towards the other side of the second shear and having an engaging gear rack, which defines an escape region. An arcuate limiting guide groove is disposed between the second pivot hole above the escape region. The engaging member has an arcuate engaging tip edge with a protrusion. The pressing arms are bi-leveled with a beveled connection and have a handle at a lower portion and a second eccentric pivot hole at an upper portion.

Abstract: A cutting tool includes a first handle, a second handle, a first cutting blade attached to the first handle at a first pivot point, and a second cutting blade attached to the second handle at a second pivot point. The first and the second cutting blades are engaged with one another at a pivot point for movement in a scissor-like manner between an open position and a closed position in response to rotational movement of the first and the second handles. The first handle includes a first toothed transmission part and the second handle includes a second toothed transmission part, the first and the second toothed transmission parts being arranged to be engaged with one another.

Abstract: A garden shears includes a pressing member, a holding member, a cutting member and a ratchet. The second through aperture of the cutting member is combined with the first assembling aperture of the pressing member and used as a pivot point. The holding member and the ratchet are assembled together at the assembling portion of the pressing member, and the driving teeth of the ratchet are engaged with the pawl of the cutting member such that the pressing member, the holding member and the ratchet have different pivot points. The opening between the blade and the anvil is smaller than the opening formed between the handle and the holding member. In other words, when a user holds both of the handle and the holding member to cut an object, since the opening formed between the handle and the holding member is larger than the cutting opening between the blade and the anvil, a stronger cutter torque is applied to increase the clipping strength derived from the anvil and the blade.

Abstract: A ratcheting cutting tool for plastic pipes having first and second, elongated rigid members pivotally mounted to each other. Each rigid member has a handle and the first rigid member additionally has an anvil at an end opposite from its handle. A spring-biased, knife blade member with a cutting edge and with a plurality of ratchet teeth is pivotally mounted to the first member. The tool further includes drive and catch pawls pivotally mounted to the respective rigid members. In operation, the handles of the rigid members can be repeatedly squeezed together to progressively move the cutting edge of the knife blade member in a step-by-step manner toward the anvil to cut through a plastic pipe positioned therebetween.

Abstract: An improved hand-held cutting tool includes a first double-sided handle member having a front open cavity for receiving an anvil member. A second double-sided handle member having an upper open cavity for receiving a biased auxiliary handle therein and a front open cavity for receiving a blade holder therein. The first and second handle members are pivoted between a first open work piece placement position and a second open blade replacement position. The first open position allows a work piece to be placed on the anvil member to be cut and the second open position allows access to the blade holder for blade replacement without using tools. The auxiliary handle is biased out of the upper open cavity in the first open position to allow a user to grasp the auxiliary handle and the first handle member with one hand to easily achieve an initial cutting operation.

Abstract: A tack strip cutter including a top blade holder and a bottom blade holder having a leverage handle for bringing the blade holders together with a leverage force. A splay inhibition guide on one of the blade holders prevents lateral movement of the blade holders when the tool is used.

Abstract: A cutting tool with double compound leverage includes first and second opposed handle levers having handle ends and pivot ends. One of the handle levers includes a double link with a rearward portion defining the handle end and a forward portion defining the pivot end. First and second opposed blade levers each include a jaw end with a cutting blade and a lever end. The blade levers are each pivotally attached intermediate the jaw end and the lever end at spaced apart pivot points to a transverse coupling element. The pivot ends of the handle levers are pivotally attached to the lever ends of the blade levers. First and second compound linkage pivotally couple the handle levers and the blade levers so as to provide complete opening and closing of the cutting jaws.

Abstract: A pair of punch pliers include a handle, a control shank assembly, a punching member, and a connecting device. The handle has a first end provided with a grip portion, a second end provided with a punching seat and a mediate portion provided with a hollow receiving base. The control shank assembly includes two press members each pivotally mounted on the receiving base of the handle, and a press block mounted between the two press members. Thus, the blanks of the handle are juxtaposed to each other, and the blanks of each of the two press members of the control shank assembly are juxtaposed to each other, so that the wasted materials of the handle and each of the two press members are reduced largely, thereby decreasing the costs of fabrication of the punch pliers.

Abstract: A pair of gardening shears include a first cutting blade, a second cutting blade, and two extension arms. The second cutting blade has a first portion pivotally mounted on the first portion of the first cutting blade by a pivot bolt. Each of the extension arms has a first portion pivotally mounted on the mediate portion of the second cutting blade and a mediate portion movably mounted on the second portion of the first cutting blade by a guide pin. Thus, when the first cutting blade is driven by the extension arms to pivot toward the second cutting blade, the guide pin is movable outwardly relative to the pivot bolt to increase a length between the guide pin and the pivot bolt to increase the force arm length and to produce a larger cutting force by the leverage action.

Abstract: A hand-held and hand-operated cutting tool particularly well suited for cleanly and quickly cutting plastic pipe or tubing, rubber hose, or the like is provided. The tool has a blade which is easily manually removed from and replaced into the cutting tool without the use of additional tools. The blade is slid into the tool and then rotated slightly into an initial operating or loaded position whereat a blade pivot pin may be inserted into the tool and through a hole provided in the blade. During use, the blade is rotatable in increments or steps from a retracted position in which it is substantially enclosed within the tool housing to a cut off position in which it cooperates with a stationary cradle anvil so as to sever the article to be cut. A ratchet drive interconnects a movable handle and the blade so as to incrementally drive the blade towards its cut off position upon manipulation of the handle.

Abstract: An apparatus for cutting a bolt includes a first member and a second member that are adapted to pivot about an axis. An L-shaped member is pivotally attached to an end of the second member. A sliding member is attached to the L-shaped member that bears on an exterior of the first member when the L-shaped member is fully pivoted toward the first member. A threaded rod includes a first end that is attached to the sliding member. The threaded rod engages with a threaded opening provided in the L-shaped member. A knob that is attached to the threaded rod is tightened which urges the sliding member and the first member toward the second member and severs the bolt that is disposed in a pair of openings proximate the axis.

Abstract: A pruning device is disclosed including a first handle coupled at a first end to a first jaw and a second handle, a first end of the second handle coupled to a second jaw. The first jaw and the second jaw are pivotally connected. A rotatable handle is interfaced to a second end of the first handle such that it rotates with respect to the second handle. A first end of a flexible medium is affixed to the second handle and a second end of the flexible medium affixed to the rotatable handle, whereas turning of the rotatable handle winds the flexible medium around the rotatable handle and the second handle is pulled towards the first handle.

Abstract: A nail clipper for pets has a clipper body formed with a pair of board spring arms with operating ends biased apart for mounting respective blade pieces thereon, and the blade pieces are each formed as a semi-circular or semi-elliptical ring half of a given thickness having a cutting edge formed on an inner facing rim thereof and diametrically opposing ends pivotally attached together with the semi-circular or semi-elliptical cutting edges positioned apart facing each other for insertion of a nail of a pet and closing together to cut the pet's nail. The blade pieces produce smooth nail edges cut in a semi-spherical or semi-elliptical shape in a single cutting action.

Abstract: A nail clipper for pets has a scissors structure provided with cutting surfaces formed by curved blade pieces. The curved blade pieces are created by dividing a spherical or elliptical body into quarter pieces having a hollow interior and formed with curved cutting edges. The blade pieces are hinged to opposite ends of a holding piece and moved by pivoting parts coupled to the ends of operating parts of the scissors structure. By operating the scissors structure, the curved blade pieces open and come together to cut the pet's nail, producing smooth nail edges cut in a curved shape with a single cutting action.

Abstract: A pair of scissors has a fixed handle, a fixed jaw extending from one end of the fixed handle, a movable jaw pivotable with respect to the fixed jaw, a movable handle pivoted with the fixed jaw along with the movable jaw by a common pivot, and a gear transmission mechanism. The gear transmission mechanism has a rack located at one end of the movable jaw, a drive gear rotatably mounted on the fixed jaw and engaged with the rack, and two driven gears rotatably mounted on the fixed jaw and engaged with the drive gear and the toothed edge of the movable jaw. The two driven gears are driven by the drive gear to cause the movable jaw to move toward or away from the fixed jaw.

Abstract: A pair of shears includes a pair of cutting members, a connection assembly, and a pair of handles. Each of the cutting members includes a blade at a cutting end thereof. Each of the blades has two sloped cutting edges, a cutting fore end connecting the two sloped cutting edges and touchable by the other cutting fore end, and two cutting corners formed on the junctions of the two cutting edges and the cutting fore end. The connection assembly is mounted to the two cutting members for connecting and positioning the two cutting members. At least one cutting member includes a plurality of ditches arranged parallel to one another on at least one cutting edge thereof. Each of the ditches extends to the cutting fore end.

Abstract: A marble and granite nipping tool that includes a pair of blade support plates as blade mounting ends whereto nipping blades having opposing nipping edges are releasably mounted and provides for setting a selected opposing nipping edge spacing to allow a use of the tool on different widths or thicknesses of marble and granite slabs, for removing or nipping off edge sections thereof. The tool includes a linkage consisting of lever arms secured at lever arm ends to the blade support plates undersurfaces that connect, in turn, through a pivot coupling to scissoring arms that and operated to provide a mechanical advantage to multiply a closure force directed through the scissoring arms and linkage and into the blade support plates for facilitating the removal of marble and granite edge sections. Which scissoring arms can, in one embodiment, be manually closed by an operator moving ends of the arms together, and, in another embodiment, by operation of a an automated scissoring arm closure arrangement.

Abstract: A hedge having two opposing cutting blades connected to handles. Both of the cutting blades and both of the handles have gear elements formed as part of the blade or handle. The gear element of one handle engages the gear element of one of the cutting blades, while the gear element of the other handle engages the gear element of the other cutting blade so that a variable force is provided throughout the cutting stroke.

Abstract: A tree pruner includes a first handle, a second handle, a fixed jaw plate, a movable jaw plate, a gear, a check plate, and a push plate. The movable jaw plate is actuated by the gear to bring about a first scissors action in conjunction with the fixed jaw plate at such time when the second handle is swivelled toward the fixed jaw plate such that the gear is pushed by the push plate to turn. The gear is arrested by the check plate so as to keep the movable jaw plate in the stationary state to facilitate a series of continuous scissors actions, with the cutting edge of the movable jaw plate remaining in the incision made into a tree twig during the first scissors action.

Abstract: A cutting stroke-adjustable pruning shears is constructed to include a fixed jaw and a movable jaw pivoted together, the movable jaw having an elongated slot and a plurality of retaining notches in one long side of the elongated slot, a holder shell, the holder shell having two parallel side panels pivoted to a middle part of the fixed jaw at two sides and a spine connected between the parallel side panels, a coupling arm, the coupling arm having one end pivoted to the parallel side panels of the holder shell and an opposite end mounted with a pivot coupled to the elongated slot of the movable jaw and selectively positioned in one of the retaining notches, a tension spring disposed inside the holder shell and connected between the holder shell and the coupling arm, and two handles respectively fastened to the fixed jaw and the holder shell.

Abstract: A manually operated modified bolt cutter is placed in a fixture supporting a bolt cutter in a reversed operating position allowing the operator to cut small dimension materials using a one hand or arm pushing motion instead of the two hand or arm compression motion. The fixture holding the bolt cutter is fixedly mounted on a bench or like support and has two upright members between which is held one handle of the bolt cutter. Bolts through the side members and one handle support the bolt cutter in the fixture. When the moveable handle is in a near vertical position the jaws of the cutter are open. When the moveable handle is pushed away from the operator, toward the rear of the cutter, the jaws close making the cut. The moveable handle is bent at an angle to decrease the operator's wrist to arm angle.

Abstract: A lopping apparatus includes a first handle having a first blade storage compartment. The lopping apparatus further includes a first blade member connected to the first handle, the first blade member having a first cutting portion. The lopping apparatus additionally includes a second handle having a second blade storage compartment. Moreover, the lopping apparatus includes a second blade member connected to the second handle, the second blade member having a second cutting portion. The lopping apparatus additionally includes a first connecting link pivotally coupled to both (i) the first handle at a first pivot location which defines a first pivot axis, and (ii) the second handle at a second pivot location which defines a second pivot axis. The first pivot axis and the second pivot axis define a line L. The lopping apparatus is positionable in a lopping mode of operation and a storage mode of operation.

Abstract: Cutting pliers for surgical purposes are used to cut through wires (40) or the like. The cutting pliers have a first two-armed hand lever (1), whose shorter, front lever arm (3) is provided with a cutting edge on its front end section. A short lever arm (11) of a second hand lever (10) is connected in terms of transmission to a two-armed cutting lever (20) having the second cutting edge via a lever transmission. To reduce the number of joints needed and to obtain higher progressions of the cutting forces on the cutting lever during the cutting operation, the short lever arm (11) of the second hand lever (10) is provided at a radially spaced location from the joint of pliers (Z) with a curved path (K1, K2), via which this short lever arm (11) acts on the cutting lever (20). This lever arm (25) is provided for this purpose with a transmission element (31, 31′) sliding on the curved path (Kl, K2).

Abstract: A cutting device is provided that includes a first handle having first and second ends, and a second handle having first and second ends. The second handle being coupled to the first handle. A first ceramic blade is coupled to the second end of the first handle, and a second ceramic blade is coupled to the second end of the second handle in cutting alignment with the first blade. The first and second handles are adapted to be operated to move the first and second blades into a contacting relationship to provide a cutting force, and the ceramic material of the first and second blades provide operator protection from electric shock, prevent device damage and minimize environmental hazard.

Abstract: A pair of gardening shears comprises a fixed jaw and a movable jaw pivoted together with the fixed jaw. The movable jaw is fastened with a connection arm and provided with a first toothed transmission portion. The fixed jaw is pivoted at one end with a rocking arm which is provided with a second toothed transmission portion meshing with the first transmission portion. The connection arm is provided with a protective portion for shielding the first and the second transmission portions such that the twigs or leaves of a garden plant are prevented from being caught and deposited in the toothed transmission portions.

Abstract: A plier device includes a pair of handle levers pivotally secured together and each having a handle formed on one end and a stem formed on the other end. Two rods are secured to the stems respectively. A pair of jaws are pivotally secured together and each having a bar extended from one end. The bars each has a groove for receiving the rods of the stems. A spring member is engaged between the bars for biasing the bars to engage with the stems and for forcing the rods into the grooves of the bars, in order to secure the jaws to the handle levers without additional fasteners and tools.

Abstract: A tool for the cutting or coining of metal, including two jaws connected to parallel links by two jaw joint bolts. Two handles are connected to each other by a handle bolt and are connected to respective jaws by two middle bolts. Each jaw joint bolt is provided with an eccentric bearing surface situated between two coaxial bearing surfaces. The distance and parallelism of the jaws can be adjusted by producing rotating of the eccentric bearing surface by rotating one or more of the jaw joint bolts. The angular motion of the jaws is synchronized by a cylindrical roller retained axially between the links, and guided in a slot formed by overlapped fingers of the jaws.

Abstract: A lopping apparatus includes a first handle having a first blade storage compartment. The lopping apparatus further includes a first blade member connected to the first handle, the first blade member having a first cutting portion. The lopping apparatus additionally includes a second handle having a second blade storage compartment. Moreover, the lopping apparatus includes a second blade member connected to the second handle, the second blade member having a second cutting portion. The lopping apparatus additionally includes a first connecting link pivotally coupled to both (i) the first handle at a first pivot location which defines a first pivot axis, and (ii) the second handle at a second pivot location which defines a second pivot axis. The first pivot axis and the second pivot axis define a line L. The lopping apparatus is positionable in a lopping mode of operation and a storage mode of operation.

Abstract: The present invention is an adjustment mechanism for both hand and production tools of any capacity. An eccentric pin mechanism provides the pivot between two handles or other load transferring members. The rotation of the pin moves the two members closer or farther apart, indirectly controlling the final position of the blades or jaws. This adjustment can be used to compensate for wear or to provide adjustment for a specific use. The eccentric pin is locked into position by means of a pressure pin mechanism. For light duty tools, this pressure pin mechanism would consist of a spring loaded pin which resists rotation of the eccentric pin during normal operation of the tool. The spring loaded pin would allow rotation of the eccentric pin when a tool is used to rotate it. For heavy duty applications, the pressure pin mechanism would consist of a solid set screw.

Abstract: The present invention is directed toward a surgical cutter for wires, pins and rods, especially spinal rods, having two cooperating jaws pivotally secured in between two holding plates by floating bolts, and having said jaws pivotally secured to two handles by freely floating bolts, so that when the handles are pushed together the jaws close and cut an object placed therein, and when the handles are pulled apart the jaws open to permit placement of an object for cutting therebetween, wherein further the handles are precisely designed to form a non-adjustable stop limiting the opening of the jaws when the handles are pulled apart and preventing the jaws from closing beyond a predetermined point when the handles are pushed together.

Abstract: A force-developing device for forceps of the type equipped with two jaw elements (2, 3) and with two handles (4, 5) includes a jaw (6A). A link rods system (6B) is articulated with the jaw (6A). A front end of a piston (7) is connected to the link rods system (6B). The piston is housed slidingly inside a first handle (4). A yoke (8) is provided for holding the second handle (5) relative to the first handle (4). A pair of complementary racks (9) mechanically drive the piston (7), the pair being borne by each of the two handles (4, 5). A trigger catch and a rack for preventing the return of the piston are borne by the first handle (4). The pair of complementary racks (9) for driving the piston (7), the trigger catch, and the rack acts alternately on the piston so that by successively moving the second handle (5) towards and away from the first handle (4), the piston (7) is moved forwards and the jaw (6A) is deformed by means of the link rods system (6B).

Abstract: A tool for severing or crimping a workpiece includes a rigid mainframe having an elongate grooved channel running through most of its length. A wedge-shaped upright rigid head forms the front portion of the mainframe. The rear portion of the mainframe has an integral shaft guideway and a mount for mounting a hydraulic cylinder and components. The head and hydraulic mount form a U-shaped jaws area. The upright head has an elongate vertical slot. A cutting or crimping blade can reciprocate along the grooved channel of the mainframe and enter the head so that the blade can fully sever a workpiece placed in the gap between the blade and head. The blade can be a pointed V-shaped cutting blade or a flat crimping blade having a blunt leading edge. The base of the blade has a flange for cooperating with the grooved channel for guiding the blade. The blade is manipulated by a hydraulic piston which is positioned in a hydraulic cylinder mounted at the rear portion of the mainframe.

Abstract: A hand tool for cutting, such as a pair of pruners, includes a pair of opposed elongated members, each member comprising a jaw at a front end portion thereof, a handle at a rear end portion thereof, and a midportion where the members cross over each other. A pivotable joint unites the midportions for scissor-like movement of the handles and jaws, and a spring biases the handles and jaws to an open position. According to the invention, one of the handles is rotatable. A transmission mechanism is provided to interconvert the rotation force applied to the rotatable handle into a rectilinear force used to draw the handles together.

Abstract: A variable force lopping tool is provided with a gear mechanism configured so that maximum leverage is obtained at a point in the cutting stroke corresponding to the maximum resistance by the workpiece being cut. The mechanism comprises a pair of mating gears formed on first and second elongated members and cooperating with a plate having a forwardly extending jaw or blade. The plate is pivotally connected to the first member. The second member is pivotally connected to a rearwardly extending tang of the plate.

Abstract: A lopper of the type having an anvil cooperable with a blade actuated by a pair of elongated members made of moldable material, the first member being unitary and comprising a first handle merging into a first gear segment having a central post integral therewith, the first member terminating at a distal end by the anvil, the second elongated member comprising a second handle merging into a second gear segment at one end of the member, the second gear segment having a second post integral therewith, the first and second members being pivotally connected to a metal plate at the central and second posts. The moldable material is most preferably a plastic, but other moldable substances could be employed.

Abstract: A hand tool is disclosed that includes a first handle that provides at one end a first hinge joint extending in a first direction and a hollow tube extending in the other direction. A fixed work element is attached at a distal end of the tube. A second handle is aligned with the first handle and provides a second hinge joint that extends in rotational engagement with the first hinge joint and includes a first set of gear teeth facing the tube. A hinge pin is pivotally engaged with and aligns the first and second hinge joints. As such, the second handle is rotatable toward and away from the first handle about the pin. A transfer rod is rotatably held within the hollow tube and extends therethrough to a movable work element that is positioned adjacent to the fixed work element. A toothed gear segment is fixed to the transfer rod and includes a second set of gear teeth that engages the first set of gear teeth.

Abstract: A multi-link cutting tool used to cut wire, pipe, cable, tube, chain and the like. The cutting tool utilizes a multi-link connecting linkage between the cutter head and the handles to increase the leverage obtained at the cutting edge. As a result of the connecting linkage, a lower force is required at the handles since they operate through a greater distance. With this multi-link connecting mechanism, a smaller and more powerful cutting tool can be made.