Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1988-10-19
1991-07-09
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
B25B 1346
Patent
active
050294970
ABSTRACT:
A continuous ratchet drive for a fluid-operated wrench or the like comprises a support, a ratchet gear mounted on the support means turnably about a first pivot axis and having a plurality of ratchet teeth, a lever pivotable about a second pivot axis extending laterally from and parallel to the first pivot axis under the action of a drive, and two pawl elements pivotally connected with the lever means in pivot points which are spaced from the second pivot axis, the pawl elements being formed so that during pivoting of the lever in one direction one of the pawl elements engages with the teeth of the ratchet gear and turns the ratchet gear in one direction, while during pivoting the lever in an opposite direction the other of the pawl elements engages with the teeth of the ratchet gear and turns the ratchet gear in the same direction, each of the pawl elements including a supporting member having one end which is pivotally connected with the lever in a respective one of the pivot points and another end, and a pawl member which is pivotally connected with the other end of the supporting member and engages with the teeth of the ratchet gear during respective pivoting of the lever.
REFERENCES:
patent: 4027561 (1977-06-01), Junkers
patent: 4409865 (1983-10-01), Krautter et al.
patent: 4644829 (1987-02-01), Junkers
patent: 4669338 (1987-06-01), Collins
Smith James G.
Striker Michael J.
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