Locking structure of unidirectional spanner

Details Locking structure of unidirectional spanner Locking structure of unidirectional spanner

2006-03-28

2006-03-28

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S059100, C192S045100

Reexamination Certificate

active

07017451

ABSTRACT:
A locking structure of a unidirectional spanner comprises a spanner body having a receiving chamber and at least one directional control communicated with the receiving chamber; a toothless ratchet receiving in the receiving chamber; at least one directional control device receiving in the directional control groove; the directional control device being formed by a directional control unit and an elastomer; the directional control unit being locked with the toothless ratchet. If the spanner body moves, a reverse force will apply to the toothless ratchet; when the reverse force causes the directional control unit to move away from the elastomer, the toothless ratchet will be locked by the directional control unit so that the toothless ratchet rotate synchronously with the spanner body. When the reverse force cause that the directional control unit can compress the elastomer, the toothless ratchet will rotate independently, namely, not rotate synchronously with the spanner body.

REFERENCES:
patent: 810599 (1906-01-01), Ansorge
patent: 870014 (1907-11-01), Campbell
patent: 870151 (1907-11-01), Rollin
patent: 1169007 (1916-01-01), Chadwick
patent: 2487987 (1949-11-01), Schmitt et al.
patent: 3577816 (1971-05-01), Alexander et al.
patent: 5259276 (1993-11-01), Baron
patent: 5417129 (1995-05-01), Baron

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