Fluid-operated wrench

Details Fluid-operated wrench Fluid-operated wrench

1985-08-21

1987-02-24

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Machine

B25B 1346

Patent

active

046448292

ABSTRACT:
A fluid-operated wrench has a support, a ratchet gear mounted on the support turnably about its axis, a pair of driving pawls having free ends engageable with teeth of the ratchet gear, a driving arm which is turnable by a driving element and cooperates with the driving pawls so that during both a forward stroke and a return stroke of the driving element a respective one of the pawls turns the ratchet gear, and a guide which is formed so that the driving arm pivots about its pivot axis and which is located outside and spaced from the pivot axis of the driving arm.

REFERENCES:
patent: 4336727 (1982-06-01), Junkers
patent: 4409865 (1983-10-01), Krautter et al.
patent: 4429597 (1984-02-01), Grabovac et al.
patent: 4458563 (1984-07-01), Bickford et al.

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