179 results about "Locking pliers" patented technology

A self-adjusting locking plier having a stationary assembly providing a stationary handle and a stationary jaw and a moveable assembly including an operating lever and a moveable jaw that is supported on the stationary jaw with a slidable pivot connection whereby the moveable jaw is permitted to automatically close down on an object disposed between the jaws for providing self-adjustment for different sized objects to be gripped between the jaws. The operating lever is spring biased to move away from the stationary handle. In addition, a dual link past-dead-center toggle locking mechanism is provided to lock the pliers on to an object gripped between the jaws. The specific arrangement of the locking toggle mechanism in combination with the moveable operating lever to which it is connected in further combination with the fact that the front end of the lever mechanism is connected with a slidable pivot to the stationary jaw provides a self-adjusting locking plier.

A joint of a pair of channel-lock pliers having an adjustable handle and a reference handle that are pivotally connected at a junction includes an elongated hole defined through the reference handle at the junction, a joint hole defined through the adjustable handle at the junction corresponding to the elongated hole and a pivot pin pivotally connecting the adjustable and the reference handles at the junction. The pivot pin has an enlarged first end and a second end, which passes through the elongated hole and the countersunk pivot hole in the handles and extends out of the countersunk pivot hole in the adjustable handle to be pressed and spread to pivotally rivet the handles together and be ground smooth to prevent protruding from the adjustable handle. Consequently, the handles are joined firmly, and appearance of the pliers is nice.

A locking pliers includes a body that supports a fixed jaw and a movable jaw. A lever is pivotably connected to the movable jaw, and a locking mechanism including a stub arm is coupled between the body and the lever to lock the jaws in a closed position. This locking mechanism includes an adjustment screw that is exposed at an end of the body remote from the fixed jaw. The body forms a resilient gripping surface that extends away from the exposed portion of the adjustment screw. This gripping surface extends beyond the end of the lever by at least about 4 inches such that the lever does not obstruct access to the grip. The user can place both hands on the grip to apply large torques to a clamped workpiece once the locking pliers has been locked in place on the workpiece.

An automatically adjustable locking pliers includes an upper jaw fixed to a handle and lower jaws that pivot about the handle. The lower jaws are connected to a lower tightening handle. A lever connects the tightening handle and upper body. This is the standard structure of locking pliers well known in the industry. The improvement includes a self-adjusting sizing and locking mechanism A thumb jaw sizing lever is located near the jaws and may be moved to open the jaws so that they can be sized around a workpiece. When the thumb jaw lever is released, the jaws automatically size and clamp lightly around the workpiece. The sizing lever and locking mechanism operate together to automatically size and lock the pliers. An adjusting screw in the lower handle near a pivot point sets the clamping force. Turning the screw adjusts the tension of the pliers for gripping the workpiece.

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.

A firefighter multi-tool, comprising a head assembly having at least one interchangeable tool head with locking means, a first handle assembly, and a second handle assembly. The first and second handle assemblies house spring-loaded tools within. The at least one interchangeable tool head comprises spring-loaded trauma shears, a bridging head, channel-lock pliers, traditional pliers, an adjustable wrench, needle-nose pliers, a ratchet, and tin snips. A carrying case carries the head assembly having at least one interchangeable tool head with locking means, the first handle assembly, and the second handle assembly. The carrying case comprises a first compartment having a locking mechanism. At least a second compartment mounts upon the first compartment to house the at least one interchangeable tool head.

One embodiment of a locking pliers includes a first stationary jaw carrier comprising a first jaw at one end; a second stationary jaw carrier comprising a second jaw at one end; a bent first handle integrally formed with the first stationary jaw carrier; a bent second handle joined the first handle at a spring-actuated pivot joint and engaged with the other end of the second stationary jaw carrier; a self-adjusting locking unit disposed between the first and second handles and comprising a spring-actuated release lever; a locking assembly comprising a slide bar having one end fixedly secured to the other end of the second stationary jaw carrier and the other end inserting into a portion of the second handle between the pivot joint and the other end of the second stationary jaw carrier, and a spring-actuated release lever member lockingly put on the slide bar.

A pair of locking pliers includes a first jaw, a first handle, a second jaw, a second handle, a toggle, an adjusting screw, a release lever, a spring, and a soft jacket. The first handle extends from the first jaw and includes a space defined therein. The second jaw is pivotally connected with the first jaw. The second handle is pivotally connected with the second jaw. The toggle includes a first end pivotally connected with the second handle and a second end inserted into the space of the first handle. The adjusting screw includes an end driven into the space of the first handle for abutment against the second end of the toggle. The release lever is pivotally connected with the second handle. The release lever includes a first end for abutment against the toggle and a second end to be pressed by a user. The spring includes an end secured to the first handle and an opposite end secured to the second jaw. The soft jacket wraps up the second handle and the release lever.

Locking pliers for being one-handed adjustable, clampable, and releasable. The locking pliers includes a fixed portion, a movable portion, a first apparatus for moving the movable portion relative to the fixed portion a desired amount in order to clamp a workpiece using only one hand, and a second apparatus for releasing the movable portion from the fixed portion in order to release the workpiece using only the one hand. The movable portion is movably connected to the fixed portion. The first apparatus is operatively connected to the fixed portion. The second apparatus is operatively connected to the movable portion.

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.

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.

One embodiment of the invention relates to a locking pliers. The locking pliers include a pair of handles and a pair of interconnected jaws coupled to the handles. The jaws are movable between a retracted position within the handles and an extended position extending from the handles. The jaws are slidably coupled to the handles and configured to slide between the retracted position and the extended position without opening the handles. When the jaws are in the extended position, the jaws have an unclamped configuration in which the jaws are adjustable by a user to permit the jaws to lock onto objects of various sizes and clamped configuration in which the jaws are releasably locked onto an object.

A locking pliers tool which combines a self-locking, frictional brake, gap setting means to set jaw gap size automatically when clamping onto a workpiece, and an over-center linkage clamping means to securely clamp the workpiece in between the opposing tool jaws, and an adjustment means for varying the clamping force to be exerted onto the gripped workpiece.

A folding multipurpose tool including adjustable locking pliers with an over-center locking mechanism to retain the jaws in a gripping condition. The jaws of the locking pliers can be folded into the handles of the tool to produce a compact folded configuration. A latch mechanism in the tool handle retains a selected one of several folding tool bits or blades in an extended position for use and includes an abutment arrangement to prevent such a selected tool bit from being extended too far. A spring associated with a tool bit driving socket retains separate tool bits and resists inadvertent removal of an adjustment screw element of the locking pliers. Upon removal of the adjustment screw element, special bits, such as a corkscrew, can be screwed into the tool bit driving socket.

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.

The invention relates to automatic adjusting locking pliers. The automatic adjusting locking pliers are provided with an automatic adjusting device on the basis of the conventional locking pliers to enable the locking pliers to clamp objects with different sizes without adjusting the locking pliers, can adjust a clamping force as required. The automatic adjusting locking pliers solve the problems that the conventional locking pliers have troubled operation, the clamping force of the conventional locking pliers is difficult to control and the like, and belong to the field of machinery. The automatic adjusting locking pliers of the invention comprise a main plier body and an auxiliary plier body, wherein a front end of the main plier body is connected with a jaw (1) and is also hinged with a jaw (2) corresponding to the jaw (1); the other side of the jaw (2) is hinged at the front end of the auxiliary plier body; a connecting rod with a meshing block and an adjusting screw, a meshing pressing block and a guide locking device are arranged between the main plier body and the auxiliary plier body; one end of the connecting rod is hinged with the auxiliary plier body, while the other end is hinged with the meshing pressing block; the meshing pressing block is also hinged with the guide locking device; the inside of the main plier body is provided with a guide rod; and the guide locking device can slide freely on the guide rod, and can be locked on a corresponding position when the meshing pressing block presses. The automatic adjusting locking pliers have the characteristics of compact structure, large adjustable range of the clamping force, strong reliability, convenient use and the like.

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.

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.

A clamping device utilizes the mechanism of conventional vise-grip locking pliers to clamp internally or to expand workpieces with adjustable force. The invention comprises a fixed arm, a movable arm with quick release mechanism, a pair of special design, crossed clamping arms with jaws. Also included with the invention is the rear adjustment screw attached to one end of the fixed arm for setting the clamping gap and the clamping force.

Pliers include upper structure including an upper jaw and handle extending therefrom, and lower structure including a lower jaw and handle. The lower jaw may pivot relative to the upper jaw, and the lower handle may pivot relative to the lower jaw. An overcenter linkage operatively connects between the upper and lower structure, biasing the lower handle and jaw away from the upper handle and jaw, respectively, when in a jaw-opening position, and enabling the lower jaw and handle to be retained in a closed configuration when the linkage is in a jaw-closing position. A lock member is movable between a locking configuration preventing pivoting of the lower handle from the closed configuration and retaining the jaws in a closed position, and a release configuration enabling the lower handle to be moved away from the closed configuration, allowing the jaws to move to an open position.

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.

The self-adjusting locking pliers include a fixed assembly having a fixed jaw supported at one end. A moveable jaw is pivotably supported on the fixed assembly at a slidable pivot connection. The slidable pivot connection includes a pawl provided with teeth. A rack of teeth includes first and second sets of teeth offset from one another by ½ of the pitch that may each be engaged by the teeth formed on pawl. A lever is attached to the fixed assembly and a linkage transmits a force applied to the lever 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.

A pair of locking pliers includes a first grip structure including a first jaw and an adjustment screw connected to a first handle. A second grip structure cooperates with the first grip structure. The second grip includes a second jaw pivotally connected to the first handle about a first pivot axis and a second handle pivotally connected to the second jaw about a second pivot axis. A lock mechanism is pivotally connected to the second handle about a third pivot axis. The lock mechanism abuts the adjustment screw which restrains the lock mechanism to the first handle. The second handle extends longitudinally and terminates at an end at a first length from the second pivot axis. A second length measures a distance between the first and second pivot axes. The second length is smaller than 0.19 times of the first length.

An automatically adjustable locking pliers or tool includes a jaw fixed to a first handle and a jaw that pivots about the first handle. The pivoting jaw is connected to a lower tightening handle. A lever connects the tightening handle and first handle. A self-adjusting sizing and locking mechanism includes a thumb jaw sizing piece located near the jaws and movable to open the jaws so that they can be sized around a workpiece. When the thumb jaw sizing piece is released, the jaws automatically size and clamp lightly around the workpiece. The locking mechanism uses balls between a locking rod and a tapered surface. Locking occurs when the balls wedge between the rod and the tapered surface. A release cylinder is connected to a release paddle movable to unlock the mechanism. The sizing piece and locking mechanism are operable to automatically size and lock the pliers or tool.