Self-locking pliers
AssigneeGong Maw Enterprise Co., Ltd.
InventorMing Chieh Wu
Life of this patent
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Abstract
A pair of self-locking pliers includes three body structures pivotally connected. Each of the three body structure has a slot, and a shaft engages in the slots. The slots cooperate to surround a space and the shaft is constrained in the space. Two of the three body structures include two jaws and are pivotal relative to each other between a first position in which the two jaws are disposed adjacent to each other, and a second position in which the two jaws are disposed apart from each other. The first, second, and third slots are adapted to releasably restrain the shaft, thereby preventing the first, second, and third body structures from pivoting relative to each other.
Claims15
A pair of self-locking pliers comprising:
- a first body structure having a first pivot connection and a first slot, with the first slot extending in depth through the first body structure, and with the first slot extending in length in a straight line and forming two opposite straight lateral sides;
- a second body structure having a second pivot connection and a second slot, with the second slot extending in depth through the second body structure, and with the second slot extending in length in a straight line and forming two opposite straight lateral sides;
- a third body structure having a third pivot connection and a third slot, with the third slot extending in depth through the third body structure, and with the third slot extending in length in a straight line and forming two opposite straight lateral sides;
- a pivot pivotally connecting the first, second, and third body structures at the first, second, and third pivot connections such that the first, second, and third body structures are pivotal relative to each other and about the pivot;
- a shaft connecting the first, second, and third body structures and movably disposed in the first, second, and third slots, wherein the two lateral sides of the first, second, and third slots cooperate to surround a space and the shaft is constrained in the space;
- wherein two of the first, second, and third body structures include two jaws and are pivotal relative to each other between a first position in which the two jaws are disposed adjacent to each other, and a second position in which the two jaws are disposed apart from each other and;
- and
- wherein the space is formed at a location in proximity to first distal ends of the first, second, and third slots and constrains the shaft when the two jaws are disposed adjacent to each other;
- and
- wherein the space is formed at a location in proximity to second distal ends of the first, second, and third slots and constrains the shaft when the two jaws are disposed apart from each other;
- and
- wherein the shaft moves towards the first distal ends of the first, second, and third slots when the two of first, second, and third body structures pivot relative to each other from the second position to the first position, wherein the shaft moves towards the second distal ends of the first, second, and third slots when the two of first, second, and third body structures pivot relative to each other from the first position to the second position, and wherein the first, second, and third slots are adapted to releasably restrain the shaft, thereby preventing the first, second, and third body structures from pivoting relative to each other.
Dependencies are inferred from the claim text.