Self-locking tool

Details Self-locking tool Self-locking tool

1990-03-21

1991-04-09

Smith, James G.

Tools

Tool jaw

With means to immobilize jaws

81324, 81329, 81381, B25B 714

Patent

active

050054503

ABSTRACT:
The locking tool of this invention comprises three or more pieces. All three pieces are connected together with an axle pin. A first handle piece has one or more arc-like slots which criss-cross with one or more slots in a second handle piece. A third piece called a jaw piece has a vertical slot that is coextensive with the other two slots. A locking pin is movably positioned in and through the three slots. When pressure is exerted upon the two handle pieces, this locking pin is tilted against the walls of the slots to lock the jaws of the tool in position. When pressure is exerted on the handles, the slots can leverage the pin both rotationally and radially. Resistance to the pin movement either radial or rotational causes the pin to be tilted against the walls of the slot in such positions as to preclude natural reversed movement of the pin as in a one-way valve.

REFERENCES:
patent: 2370308 (1945-02-01), Hanson
patent: 2787925 (1957-04-01), Buchanan et al.
patent: 3126775 (1964-03-01), Ramge
patent: 3257878 (1966-06-01), Andersen

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