Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1986-01-27
1989-01-03
Meislin, Debra S.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 574, 81 583, B25B 1346
Patent
active
047948264
ABSTRACT:
A hydraulic powered wrench for fastening and unfastening a bolt, or the like, is presented. A wrench comprises a control valve capable of coupling hydraulic fluid to either of two hydraulic conduits, one on each side of a hydraulic piston within a hydraulic cylinder so that the control valve can move the piston linearly. A double ended socket, each end comprising a bolt receiving surface is utilized. Only a single positive drive is coupled to an external female spline and is coupled to rotate the socket in one direction only. A cylinder rod is coupled to and moved linearly by the piston and is pivotally connected to drive rotationally the drive arm via a female clevis wherein the drive arm is coupled to rotate the ratchet thru the positive drive which in turn is coupled to the socket.
REFERENCES:
patent: 1662543 (1928-03-01), Smith et al.
patent: 2774336 (1956-12-01), Geyer
patent: 3087307 (1963-04-01), Faisandier
patent: 4281601 (1981-08-01), Overman
patent: 4294122 (1981-10-01), Couchman
patent: 4336727 (1982-06-01), Junkers
patent: 4498874 (1985-02-01), Pichl
patent: 4509407 (1985-04-01), Balaskas
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