Patent CA-2299215-A1 (CA)
Inventor: DOMENGE ALBERTO G
IPC: B25B7/22
Filed: 2000-02-16
Abstract: A hand tool is provided that includes at least two elongated members pivotally interconnected by a pivot joint to provide a pair of handles and a pair of jaw carrying members. Each jaw carrying member includes a self adjusting jaw pivotally connected thereto, which is configured to have an angle-shape, whereby operation of the handle causes engagement of a multi-sided workpiece by the angle-shaped jaws to enable firm engagement with a workpiece and imparting of a rotational force or torque thereto. Each angle-shaped jaw is configured to engage two sides of a hexagonal fastener, and the pivot joint may be configured as a slip joint. The slip joint may include a slot formed in at least one of the elongated members, and the slot includes at least two adjusting notches therein. A pin for pivotally interconnecting the elongated members is mounted on the other of the elongated members, and is movable within the slot from one adjusting notch to the other, thereby permitting adjustment of jaw spacing to accommodate different size fasteners. Additionally, the slot may be provided with more than two adjusting notches to permit greater adjustability of the hand tool, and a second slot may be formed in the other of the elongated members, with the second slot having at least two adjusting notches therein. Furthermore, the pin for interconnecting the elongated members is rotatably mounted and is configured to have a D-shaped cross-section, whereby the pin is rotatable to align the flat side of the D-shape with a longitudinal dimension of each of the slots to permit sliding movement of both elongate members relative to one another to provide adjustment and to position the curved side of the pin within the respective notches to prevent relative pivoting of the elongated handles to allow operation of the hand tool.  Moreover, a toggle-link type hand tool is provided that includes pivotally interconnected elements having workpiece engaging members and a pair of handles each operatively connected to a respective one of the pivotally interconnected elements, and a toggle-link operatively connected between the handles. Additionally, each of the workpiece engaging members includes a self adjusting jaw pivotally connected thereto and each jaw is configured to have an angle-shape for engagement with two adjacent sides of a hexagonal fastener. Additionally, the pivotable connection of at least one of the self adjusting jaws to a respective workpiece engaging member may be provided by a slot formed in one of the jaw and the member and a pin fixed to the other of the jaw and the member to provide greater adjustability of the jaws. Furthermore, the workpiece engaging members may be configured to have a cutting surface, configured as straight blades or as curved cutting surfaces. Actuating mechanism may be provided that includes a gear segment formed on each of the workpiece engaging members, with the gear segments meshing together so that movement of the one workpiece engaging member by operation of the handle transmits movement to the other workpiece engaging member for actuation thereof.