Abstract: A pressure adjusting device of a quick fixture includes a main member, a fixed member fixed to the main member, a movable member movably connected to the main member, and an elastic member received in the main member and having opposite end connected to the fixed member and the movable member to urge the movable member. With the pressure adjusting device the quick fixture can fix various workpieces with different thicknesses.

Abstract: A compound pliers has a main joint pivotally connecting a right jaw to a left jaw; a right jaw lever extending from the left jaw and a left jaw lever extending from the right jaw; an auxiliary joint pivotally connecting a right handle joint lever to a left handle joint lever; a right handle joint connecting a right jaw lever to a right handle joint lever; a left handle joint connecting a left jaw lever to a left handle joint lever; and a right handle indent formed on the right jaw lever. The right handle indent receives an auxiliary joint protrusion. The auxiliary joint protrusion is formed around the auxiliary joint.

Abstract: A hand tool generally includes a tool mount that removably receives thereon a tool. The tool mount and tool cooperate to provide the hand tool with a variable angle of attack with an enhanced power ratio for accommodating aged, arthritic and otherwise handicapped people.

Abstract: A dust-collector locking/unlocking device to lock or unlock a dust-collector removably mounted in a cleaner body. The dust-collector locking/unlocking the device includes a first member and a second member connected with a lower portion of the first member and serving as a cover for the dust-collector. The first member includes a first hook that is rotatably connected with an upper wall of the cleaner body, a manipulation lever that protrudes from an outer circumference of the first member for rotation of the first member by a user, and first cam parts formed on a lower portion of the first member. The second member includes a second hook movably connected with guide cams formed on the first member, and second cam parts engaged with the first camp part. The second member is moved up and down by the rotational movement of the manipulation lever and thereby lock or unlock the dust-collector.

Abstract: A hand tool for use by one hand provides double compound leverage of the force exerted on the handles to the jaws. This is achieved by adding additional pivots and lever arms between the handles and the jaws. The jaws may take the form of a sheet metal snip, seamer, or crimper.

Abstract: A hole-puncher having a roller module with knife protrusions and a mold module roller which are pivotally mounted to mouth sections of the hole-puncher. The knife protrusion roller module is provided with knife head protrusions of various sizes and at least a punching protrusion, and the mold module roller is provided with a plurality of knife mold seats and at least a chopping block. The knife mold seats are provided with protrusions, thereby holes can be punched by rotating the knife roller corresponding to the knife mold seat or the chopping block.

Abstract: Self-adjusting pliers include first and second elongated members each having at one end a jaw portion and at the other end a handle portion, with the elongated members pivotally connected at a position intermediate the jaw and handle portions such that upon positioning the jaw portions on a workpiece and squeezing the handle portions toward each other, the jaws adjust to thickness of the workpiece as they grip the workpiece. The pliers further include a ratchet locking mechanism between the handle portions, the locking mechanism adapted to releasably secure the handle portions upon squeezing of the handle portions toward each other and gripping of the workpiece by the jaw portions to prevent the handle portions from moving apart. A cam operated adjustor is connected to the locking mechanism to increase pressure of the jaw portions about the workpiece, after securing, by hand pressure alone.

Abstract: A clamp pin has two clamping jaws, each having a clamping arm and an actuating arm. Being connected pivotably to each other between the clamping and actuating arms, the clamping jaws are pivotable between a condition in which the clamping arms are opened and a condition in which the clamping arms are closed and toward which the clamping jaws are biased. The clamp pin has two actuating links, each having a upper end, which is connected pivotably to the actuating arm of one of the clamping jaws, and each having a lower end. The actuating links are connected pivotably to each other at the lower ends, via a grommet. The clamp pin is useful and may be advantageously combined with a clamp stick having a socket and having a hook movable into and out from the socket, wherein the grommet is adapted to receive the hook and wherein the actuating links are adapted to be drawn into the socket, along with the hook, when the hook is received by the grommet.

Abstract: A tool for forming a high strength reinforcing bar coupling driving self-locking wedge sleeves over each end of a contractible jaw assembly bridging the abutting ends of the bar to be joined. The sleeves are seated in collars engaged by the distal ends of arms driven for closure by a piston-cylinder power unit and a cam on at least one arm. In one form the cam on one arm is engaged by a roller connected by a tension link to the other arm. In another form cams are provided on each arm driven by rollers fixed with respect to each other. The collars include self-releasing collets seating the sleeves. The tool has other uses such as bar shearing or forming.

Abstract: A plastic rivet puller includes two handles pivoted together, a first jaw plate fixedly fastened to one handle, a second jaw plate adjustably fastened to the other handle in one of a series of angular positions and adapted to work with the first jaw plate to pull the stud element of a plastic rivet from the socket element of the plastic rivet, the first jaw plate having a rightwards extended front jaw tip terminating in a beveled front end edge, the second jaw plate having a leftwards extended front jaw tip terminating in a beveled front end edge and adapted to work with the front jaw tip of the first jaw plate and to force the stud element of the plastic rivet out of the socket element of the plastic rivet when turning the handles to close the first jaw plate and the second jaw plate, and a stop plate pivoted to the second jaw plate and adapted to stop the front jaw tip of the second jaw plate from touching the front jaw tip of the second jaw plate, preventing damage to the plastic rivet during the pulling o

Abstract: A pliers-type hand tool has a pair of pivotally connected jaw-forming members defining jaw portions on one side of the pivot connection and elongate slotted lever portions on the other side of the pivot connection. A slide pin is received in the lever portion slots and is connected by pivot links to operating handles which are attached to the pivot connection in common with the jaw-forming members. The arrangement produces a mechanical advantage between the handles and the jaw-forming members allowing a greater jaw-closing force to be developed, related to the manual effort applied to the handles, than with conventional pliers-type tools of comparable size.