Abstract: Pliers have two pliers handles guided such that they cross one another in a joint region having a stationary joint bolt. Gripping regions are formed on the pliers handles on one side of the joint region, and working regions are formed on free ends of the pliers handles on the other side, said working regions extending to form a pliers jaw. The working regions have first and second toothed regions that come into contact when the pliers jaw is closed. In the first toothed region, in a sequence in the longitudinal extension of the pliers handle, the tooth tips end in a surrounding surface that is flat in the longitudinal section and in contact with same, and the tooth tips of the opposing second toothed region end in a surrounding surface that is convex in the longitudinal section and in contact with same.

Abstract: A clamping tool is provided which includes a base, a clamping arm articulated to the base for pivotal movement about a first pivot axis, a handle articulated to the clamping arm or base for pivotal movement about a second pivot axis, a bridge element articulated to the handle or the clamping arm for pivotal movement about a third pivot axis, a first wedge element having a first wedge surface, and a second wedge element having a second wedge surface facing towards the first wedge surface. In a first positional range of the handle, the wedge surfaces are spaced apart. In a second positional range of the handle, the second wedge surface is supported on the first wedge surface, displacement of the first wedge element driving a displacement of the second wedge element. The bridge element is articulated to the first wedge element for pivotal movement about a fourth pivot axis.

Abstract: A locking pliers includes a fixed handle supporting a fixed jaw, a movable jaw, a movable handle pivotally connected to the movable jaw about a pivotal axis, and a movable pivot unit disposed on the fixed handle and the movable jaw. The pivot unit includes a pivot pin and a pivot hole configured to loosely receive the pivot pin such that, when a manual turning force is applied to the movable handle, the movable jaw is turned clockwise to a locking position. As a result of abutting engagement between the pivot pin and a leading region of the pivot hole, a friction force is generated to hold the movable jaw in a tightening position. The gripping force between fixed and movable clamping surfaces of the jaws can be firm and stable.

Abstract: A structure of locking pliers includes a movable joint pulling and pushing mechanism directly mounted to a tail end of a second handle. The mechanism includes a movable pulling bar forming a front-end arc recess that is positioned against a middle projection of a movable locking arm straddling between first and second handles of the pliers. The movable pulling bar of the pulling and pushing mechanism is provided with a U-shaped groove, which has a side projecting to form a wing projection, in a portion thereof that is engageable with the tail end of the second handle. The wing projection functions as a safety and protection device so that the movable joint pulling and pushing mechanism is provided with a hand push-way function to protect a user's hand from clamping and injury.

Abstract: The pair of locking pliers contains a seesaw member pivotally joined to a back end of a first handle; and an adjustment member capable of sliding up and down within the first handle. The adjustment member contains an adjustment body and an adjustment bolt axially and rotatably threading through the adjustment body. The seesaw member contains a seesaw handle and a torsion spring engaging the seesaw handle so that a first chain of teeth of the seesaw handle engages or disengages a second chain of teeth along the adjustment body to lock the adjustment body or to allow the adjustment body to slide up and down. When the adjustment body slides, a spacing between the jaws of the locking pliers are adjusted quickly. When the adjustment body is locked by the seesaw handle, the adjustment bolt is twisted to fine-tune the jaw spacing.

Abstract: A jaw release mechanism for locking pliers which utilize an over-center toggle locking mechanism and wherein the normally stationary upper jaw of the pliers is pivotally fastened to the main body of the pliers. This normally stationary upper jaw is releaseably retained in a normally stationary position relative to the main body of the pliers by a thumb actuated trigger release mechanism whereby the locked pliers may be safely released with the same hand which grasps and manipulates the pliers.

Abstract: A self-adjusting locking pliers includes a stationary handle; a front stationary jaw; a thumb screw threadedly secured to a rear end of the stationary handle; a front moveable jaw; an operating handle pivotably secured to a rear end of the moveable jaw; a toggle link pivotably interconnecting the stationary handle and the operating handle; a biasing member having one end secured by the moveable jaw and the other end fastened in the stationary handle; a quick release lever having an intermediate portion pivotably fastened in the operating handle and a front end urged against one end of the toggle link in the operating handle; and a retainer having one end pivotably secured to a rear end of the operating handle, the retainer comprising a ring at the other end and a bar interconnecting both ends. The ring may be lockingly put on the thumb screw.

Abstract: The pair of locking pliers contains a seesaw member pivotally joined to a back end of a first handle; and an adjustment member capable of sliding up and down within the first handle. The adjustment member contains an adjustment body and an adjustment bolt axially and rotatably threading through the adjustment body. The seesaw member contains a seesaw handle and a torsion spring engaging the seesaw handle so that a first chain of teeth of the seesaw handle engages or disengages a second chain of teeth along the adjustment body to lock the adjustment body or to allow the adjustment body to slide up and down. When the adjustment body slides, a spacing between the jaws of the locking pliers are adjusted quickly. When the adjustment body is locked by the seesaw handle, the adjustment bolt is twisted to fine-tune the jaw spacing.

Abstract: Pliers with parallel jaws include an upper portion having an upper jaw of upper teeth, a lower jaw portion having a lower jaw of lower teeth. The lower jaw portion includes first and second pivot points. An adjustment portion is non-pivotably coupled to the upper portion and selectively movable relative thereto and includes a first pivot point. A lower handle includes first and second pivot points. A break over link includes first and second pivot points pivotably coupled to the adjustment portion and lower handle's first pivot points, respectively. A two-point link includes first and second pivot points pivotably coupled to the upper portion's and lower jaw portion's first pivot points, respectively. A three-point link includes first and second pivot points pivotably coupled to upper and lower jaw portions' first and second pivot points, respectively, and a third pivot point pivotably coupled to the lower handle's second pivot point.

Abstract: A jaw release mechanism for locking pliers which utilize an over-center toggle locking mechanism and wherein the normally stationary upper jaw of the pliers is pivotally fastened to the main body of the pliers. This normally stationary upper jaw is releaseably retained in a normally stationary position relative to the main body of the pliers by a thumb actuated trigger release mechanism whereby the locked pliers may be safely released with the same hand which grasps and manipulates the pliers.

Abstract: A pair of hose clamp pliers comprises a pair of hose clamp pliers and two clamping plates. The pliers include two clamping ends capable of moving toward or away from each other. The two clamping plates are fixedly connected to the two clamping ends, and the respective clamping plates are formed with at least one opening. When in use, the two clamping plates are used to clamp the hose clamp, and the hose clamp pliers are used to fix the positions of the two clamping ends, so that the user can position the hose clamp without exerting a continuous force.

Abstract: The locking pliers comprises a first handle connected to a first jaw. A second handle and second jaw are pivotably connected to the first handle and first jaw such that movement of the first handle relative to the second handle causes the jaws to open and close. A mechanism is provided to lock the jaws relative to one another and apply a clamping or gripping force on a workpiece positioned between the jaws. A release mechanism is provided to unlock the pliers that is independent of the locking operation.

Abstract: A restricting member with an engaging structure for a pair of locking pliers comprises a first pivoting portion, a second pivoting portion and the engaging structure. The engaging structure extends out of an upper part of the restricting member, so that it can be positioned in a groove of a side handle, and makes a supporting portion of a linking member press against the groove of the side handle. The restricting member not only saves space and cost for it needs no additional subassemblies, but also makes the assembling work more convenient.

Abstract: A locking pliers tool with an improved dual action driver handle comprising two intersecting handles and interacting jaws. When the user grips the handle forward the resultant force produces a locking action. Conversely, when a rearward gripping force is initiated, the tool releases its grip on the object. A limited amount of energy on the inventive handle produces free movement of the handle and gripping mechanism to lock or release. The system operates with a handle and stationary jaw in conjunction with a second pivotally secured jaw and internal adjustment bolt. A second lever handle rests against the adjustment bolt. An over center toggle link connects the second lever handle to the pivotally secured second jaw. A tension spring interconnects the first handle and the pivotally secured second jaw.

Abstract: The self-adjusting locking pliers include a body having a fixed jaw supported at one end. A moveable jaw is pivotably supported on the body at a slidable pivot connection. A linkage transmits a force applied to the handles of the pliers to the jaws and locks the jaws in the clamping position. The linkage allows the angle between the links to be preset to thereby control the clamping force applied to the work piece. The movable jaw is selectively attached to the linkage in one of two positions such that the jaw span may be adjusted without affecting the geometry of the linkage.

Abstract: A self-adjusting variable grip locking plier for gripping a workpiece. The plier includes a body, a handle, and a wedge. The plier is designed for extremely fast set up and for easily gripping and holding the workpiece with one hand with absolutely no adjustments ever to make, and provides a larger than ordinary jaw capacity in a very compact design. The plier grips and holds the workpiece with a light or tremendous gripping force with no adjustments ever to make, and with an extremely fast unlocking system, while at the same time fitting into the palm of one hand. When the workpiece is grasped, one simply ratchets the handle until the desired grip is obtained. The more times one squeezes the handle the tighter the grip. This automatically locks the plier at the desired grip. To release the plier one simply pushes the wedge back into the body with the palm of one hand.

Abstract: Locking pliers include a stationary front jaw, a stationary handle, a movable front jaw, a movable handle, an adjusting screw rod, and a locking lever. The movable front jaw is moved toward the stationary front jaw to clamp an object therebetween when the movable handle and the stationary handle are forcefully brought together by an external force applied thereto. A releasing lever for unlocking the movable front jaw and the stationary front jaw has a flex wall body with a substantially flat central portion and two opposite curved side portions flaring curvedly and upwardly from the flat central portion. The flat central portion has a width larger than the diameter of the adjusting screw rod.

Abstract: A safety lock-out grounding device renders each of the phase leads of single phased or multi-phased electrical equipment to a grounded, safe condition to facilitate safe servicing or repair. The device has sheathed flexible phase leads and a sheathed ground conductor each being provided with an adjustable toggle actuated clamping device to establish positive clamping with the phase leads of the electrical equipment and positive clamping with a ground buss. Each of the clamping devices has relatively moveable locking components that define lock openings which become aligned when the respective adjustable toggle actuated clamping device is clamped onto a phase lead or ground buss.

Abstract: An adjustable pliers wrench including a fixture having a handle and an opposing stationary jaw, a co-acting jaw pivoted to the fixture and a lever pivoted to the co-acting jaw. A guide is attached proximate the handle and a locking element is arranged on the guide for reciprocal and canting movement. At least one attached biasing element urges the locking element toward the stationary jaw. An arm is pivoted to the lever and a cam is pivoted to the arm and to the locking element so as to be movable between a first condition permitting the locking element to reciprocate along the guide and a second condition bearing against the guide and canting the locking element into frictional engagement against the guide.

Abstract: An adjustable pliers wrench including a fixture having a handle and an opposing stationary jaw, a co-acting jaw pivoted to the fixture and a lever pivoted to the co-acting jaw. A guide is attached proximate the handle and a locking element is arranged on the guide for reciprocal and canting movement. At least one attached biasing element urges the locking element toward the stationary jaw. An arm is pivoted to the lever and a cam is pivoted to the arm and to the locking element so as to be movable between a first condition permitting the locking element to reciprocate along the guide and a second condition bearing against the guide and canting the locking element into frictional engagement against the guide.

Abstract: A pair of pliers for disassembling a pipe-fastening clamp has two control members respectively having through holes. A control device is connected with the two control members and has two control tubular lines each inserted with a steel wire having one end inserted through the through hole of each control member. Each tubular line has one end provided with a positioning block and the other end fixed with a push member and the other end combined with two clamping blocks facing each other. The steel wire has one end fitted with a fixing member. Thus, the two clamping blocks are controlled to expand open the pipe fastening clamp for facilitating disassembling pipes.

Abstract: A self adjusting closure mechanism for a locking plier or similar device. Central to the invention is a set of one or more friction pawls which slide along a support rod, moved by a push link working against a spring. The push link is free to rotate between two positions relative to the rod as it slides. In the first position, and in between the positions, the push link bears against the center of the friction pawls and they remain free to slide along the rod. When the push link rotates to the second position, it presses on the edge of the pawls, causing them to tilt, coupling to the rod and preventing movement along the rod. In a typical locking plier, the support rod is mounted to the frame and the opposite end of the push link connects to the handle. As the handle closes, the push link rotates towards its second position and optionally slides along the support rod. When the friction pawls lock, the plier begins to grip and lock on to the work piece.

Abstract: An adjustable pliers wrench including a fixture having a handle and an opposing stationary jaw, a co-acting jaw pivoted to the fixture and a lever pivoted to the co-acting jaw. A guide is attached proximate the handle and a locking element is arranged on the guide for reciprocal and canting movement. At least one attached biasing element urges the locking element toward the stationary jaw. An arm is pivoted to the lever and a cam is pivoted to the arm and to the locking element so as to be movable between a first condition permitting the locking element to reciprocate along the guide and a second condition bearing against the guide and canting the locking element into frictional engagement against the guide.

Abstract: A quick release and toggle locking mechanism for a conventional pliers-type, toggle-locking hand tool comprises a compound toggle link. The mechanism includes a compound link pivotally connected to a movable handle and a toggle link. Retention means is provided for restricting pivotal movement of the compound link relative to the movable handle.

Abstract: An adjustable pliers wrench including a fixture having a handle and an opposing stationary jaw, a co-acting jaw pivoted to the fixture and a lever pivoted to the co-acting jaw. A guide is attached proximate the handle and a locking element is arranged on the guide for reciprocal and canting movement. At least one attached biasing element urges the locking element toward the stationary jaw. An arm is pivoted to the lever and a cam is pivoted to the arm and to the locking element so as to be movable between a first condition permitting the locking element to reciprocate along the guide and a second condition bearing against the guide and canting the locking element into frictional engagement against the guide.

Abstract: A quick release and toggle locking mechanism for a conventional pliers-type, toggle-locking hand tool comprises a compound toggle link. The mechanism includes a compound link pivotally connected to a movable handle and a toggle link. Retention means is provided for restricting pivotal movement of the compound link relative to the movable handle.

Abstract: An adjustable locking pliers-type tool has a first handle provided with a fixed jaw, a movable jaw pivotally connected to the first handle, a second handle pivotally connected to the movable jaw, and a toggle linkage system cooperatively connected between the two handles. The linkage system includes a toggle link connected to one of a pair of wedges disposed in the first handle and coacts through a shoulder thereon with the second wedge. The two wedges are magnetically attracted into close contact with a floater plate separating the wedges with a force sufficient to prevent formation of oil films between their mating surfaces.

Abstract: Locking grips (1) designed so that their latch lock mechanism (8) cannot travel beyond a point of alignment of its three points but locks, slightly set back with respect to this alignment, by the snap-fastening of a relief (30) of a catch (28) borne by a lever (10) behind a tooth (19) of a front end of a link (13). The catch (28) forms a trigger (28A) which allows the locking grips to be opened in a controlled way after the lever (10) has been released.

Abstract: A locking plier tool, for clamping onto a workpiece of any size within the expanse of the tool's open jaws, has a thumb-actuated control member on the tool body and a release lever which facilitate, respectively, workpiece pressure adjustment and tool release by one hand of the operator manipulating the tool. A semiautomatic means for adjusting the tool's clamping pressure is also disclosed.

Abstract: A vice like grip for chains comprised of an elongated main handle. A pivoting jaw portion is pivotally coupled with the elongated main handle. The device includes a pair of gripping elements. One of the gripping elements is secured to the elongated main handle. Another gripping element is secured to the pivoting jaw portion.

Abstract: A locking pliers wrench adjustable to grip between two jaws and lock onto objects in a range of sizes. An elongated handle forms the body of the wrench. The rear portion of the handle is channel-shaped in cross section and houses a gripping size adjusting screw and a jaw actuating slider actuated thereby. One jaw is rigidly mounted on the fore end of the handle while the second jaw is pivotally mounted on the handle at a first point adjacent the rear end of the first jaw. A second handle extends generally parallel to the body forming first handle and is pivotally connected to the second jaw at a second pivot point spaced from the first pivot point. A link connects the second handle with the fore end of the jaw actuating slider. The adjusting screw is free to rotate but is restrained from axial movement. A nut is locked in the rear end of the slider so as to receive the threaded shank of the screw. The rear portion of the screw rotatably engages the rear end of the body forming handle.

Abstract: A chain pliers (10) comprising a body (12) and a first jaw (14). A component (16) is for attaching in a stationary manner the first jaw (14) to a top end (18) of the body (12). A second jaw (20) is provided. An element (22) is for attaching in a pivotal manner the second jaw (20) to the top end (18) of the body (12) opposite from the first jaw (14). A vise grip assembly (24) is between the body (12) and the second jaw (20). A person can operate with one hand the vise grip assembly (24) and move the second jaw (20) towards the first jaw (14), to engage with opposite ends of a chain (26) to tighten the chain (26).

Abstract: An improved locking tool having a toggle mechanism extending between the operating handles has a cam located at an intersection of two of the elements of the toggle to vary the distance between the points of contact between the mechanism and the handles as the tool is opened or closed. The adjustment to such distance provides for increased ease of operation with less operating force. Disclosed embodiments include a further mechanism to assist in the separation of the handles and to resealably lock the handles in the clamped position.

Abstract: A plier-type locking wrench has an elongated body having a pair of jaws at one end and a pair of handles at an opposite end. The pair of jaws includes a fixed jaw and a movable jaw. The pair of handles includes a fixed handle and a movable handle. A threaded member engages the fixed handle. An operating crank is pivotally attached to the body adjacent the fixed handle. The movable jaw is connected to the operating crank by a connecting rod. The movable handle is pivotally connected to the operating crank. A locking lever has a first end pivotally connected to the movable handle and a second end cammingly engageable with the threaded member. The movable handle is displacable relative to the fixed handle to displace the operating crank which, in turn, displaces the connecting rod and the movable jaw. The locking lever permits the movable jaw to be locked in a desire position relative to the fixed jaw. The threaded member is adjustable to adjust the locking position of the pivotal jaw.

Abstract: A large capacity locking pliers includes a body, a fixed jaw, a movable jaw, and an over-center toggle linkage secured between the movable jaw and the body to lock the movable jaw in position with respect to the fixed jaw. The jaws define respective working surfaces, and each of the working surfaces defines an end portion, an intermediate portion, and a concave inner portion. The concave inner portion of the fixed jaw extends over an arc .alpha. of at least 45.degree. and the concave inner portion of the movable jaw extends over an arc .beta. of at least 80.degree.. These concave inner portions are concentric when the movable jaws move to a selected open position to grip a large cylindrical workpiece. The fixed and movable jaws are asymmetrical in order to facilitate fabrication and finishing of the completed pliers.

Abstract: Plier type toggle wrenches may be divided into two broad types: the more common type in which the tool is caused to remain in its gripping mode when a portion of the toggle crosses over, or beyond the toggle center line; and, the less common type in which the toggle does not cross the toggle center line when the tool is in the gripping mode. The second type will not remain in the gripping mode unless the user applies continuous hand pressure, or, a releasable latching means is used to prevent the tool from opening. The present invention relates to the second type of toggle wrenches, and, in the preferred species of the invention, the latching means is in the nature of a sear, the elements of which engage in locked position when the tool is gripping a workpiece.

Abstract: A hand tool which comprises a fixed handle with a fixed jaw on the front portion and a movable jaw pivotally connected to the front portion of the fixed handle. A movable handle is connected to the movable jaw. An adjusting mechanism is provided for adjusting the position of the movable jaw relative to the fixed jaw and consists of a threaded opening in the rear of the fixed handle and a screw member received within the opening. The screw member has a plurality of multiple first individual threads with the same diameter and pitch that mate with the threaded opening in the fixed handle.

Abstract: A quick release for a conventional plier-type, toggle-locking hand tool comprises a compound toggle link. The new link is pivotably mounted between the movable handle and the conventional toggle member. Four pivot points rather than the usual three form the "power line" of the tool. Locking the tool involves pushing the two internal pivot points inwardly across the power line. Release involves opening the handles which moves the internal pivot points back across the power line. Depending on the dimensions of the actual hand tool, the mechanical advantage of the novel compound link is between 4 to 16.

Abstract: An automotive parking brake cable and lever removing tool includes a prying device secured to one of the handle members of a locking pliers. The prying device has a lever arm that pivots with respect to the locking plier handle member to cause movement of a bifurcated blade-like end portion of the lever arm away from the clamping jaws of the locking pliers. In one embodiment the lever arm of the prying device is coextensive with the locking plier handle members. In another embodiment the prying device includes a fixed arm immovably secured to the locking pliers intermediate the locking plier handle member and the movable lever arm. The lever arm and fixed arm of the prying device extend a predetermined amount beyond the end portions of the locking plier handle members. In another embodiment, a cavity or recess is provided in the spring-engaging face of the bifurcated blade-like end portion of the prying device to securely engage a parking brake cable spring during use of the tool.

Abstract: A safety shut off mechanism for a fluid-powered motor comprises a reaction torque structure tending the rotate in a direction opposite to the direction of rotation of the motor under load a swing-bar for normally restraining the reaction torque structure against rotation, a reference structure for providing a point of reference as to movement of the reaction torque structure, a locking structure actuated by fluid pressure for locking the reference structure against rotation, a retaining structure tending to retain the reaction torque structure and the reference structure in a predetermined orientation relative to each other, and a shut-off structure for depriving the motor of the motive force of the fluid in response to relative movement between the reaction torque structure and the reference structure upon failure of the swing-bar.

Abstract: A positive-locking surgical clamp has a first channel-shaped handle provided with a stationary elongated gripping jaw, a movable elongated gripping jaw pivotally mounted on the first handle in cooperative relationship with the stationary jaw and also pivotally joined to one end of a second channel-shaped handle, and a lever disposed within the confronting channels of the two handles and pivotally joined at one end to the second handle and at the other end engaging an adjustably positioned block supported in the channel of the first handle to provide a toggle action which develops a locked grip of large even pressure when the handles are squeezed into engagement with each other. The grip of the clamp is easily released by a thumb-actuated lever disposed alongside one of the handles which operates a cam pivoted within the channel of the handle in a position to engage the lever and force the handles apart.