Hydraulic wrench

Details Hydraulic wrench Hydraulic wrench

1974-08-16

1976-01-06

Abbott, Frank L.

Tool driving or impacting

Means to drive tool about an axis

Means to hold and relatively rotate sections of tool shaft

74128, 74156, 81 5739, B25B 1346

Patent

active

039307760

ABSTRACT:
A hydraulic wrench has a support, and a drive assembly which is mounted thereon and which includes a shaft that is turnable, a pair of sector drive plates which are mounted on the shaft turnable relative to the same and spaced from one another, each drive plate having an arcuate edge face formed with a plurality of slots that are spaced about the axis of the shaft and extend substantially parallel to this axis, and a square drive member which is turnable with the shaft and can be inserted into a mating drive socket. A transmission arrangement transmits motion from the sector drive plates to the shaft in order to turn the latter when the sector drive plates are turned. A hydraulic cylinder unit is also mounted on the support for pivotal movement about an axis parallelling that of the shaft and spaced therefrom, and the cylinder unit has a reciprocable piston rod having a working stroke and being provided with a projection that can engage in the respective slots of the sector drive plates, in order to turn the latter during the working stroke of the piston rod.

REFERENCES:
patent: 2573469 (1951-10-01), Maclay
patent: 2758569 (1956-08-01), Peterson
patent: 2844982 (1958-07-01), Swenson
patent: 3706244 (1972-12-01), Wilmeth
patent: 3791230 (1974-02-01), Webb

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