Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1991-08-02
1992-08-25
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 55, B25B 1346
Patent
active
051408740
ABSTRACT:
A hydraulic wrench has a housing, fluid-operated drive means, a ratchet turnably mounted in the housing and connected with the drive means so as to be turned by the latter, the ratchet being formed as a one-way ratchet so that when going from loosening of a threaded connector to tightening of a threaded connector and vice versa, the housing together with the ratchet is to be turned over. A first engaging element is connected with the ratchet so as to loosen a threaded connector on one side of the housing and to tighten a threaded connector on the other side of the housing. The first engaging element is engageable with a threaded connector to be loosened or tightened. A second engaging element is located at opposite sides of the housing. A reaction member extends so as to transfer a reaction force to a stationary object during the tightening and loosening so that the housing becomes stationary while the first engaging element turns. The reaction member engages with the second engaging element during the tightening at one side of the housing and during the loosening at the other side of the housing.
REFERENCES:
patent: 3941017 (1976-03-01), Leniser et al.
patent: 4448096 (1984-05-01), Collins
patent: 4706527 (1987-11-01), Junkers
patent: 4846028 (1989-07-01), Junkers
patent: 4854197 (1989-08-01), Walton
patent: 4982626 (1991-01-01), More et al.
Smith James G.
Striker Michael J.
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