Hydraulic power wrench

Details Hydraulic power wrench Hydraulic power wrench

1987-03-05

1989-02-21

Schmidt, Frederick R.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 5744, B25B 1346

Patent

active

048054968

ABSTRACT:
The power wrench comprises a housing (10) with a rearward housing member (12) which forms a protection against bursting for the hydraulic cylinder (27) arranged within the housing member (12). Through a joint (38, 40) and self-aligning, the piston (35) acts upon the lever (18) which is supported coaxially to the ring (14). The lever (18) comprises a ratchet element (17) being supported at the lever (18) by a semisperical pressure member (20). The power wrench can be submitted to extremely high hydraulic pressures without a danger to the environment.

REFERENCES:
patent: 2758569 (1956-08-01), Peterson
patent: 2818314 (1957-12-01), Nicholas
patent: 3395619 (1968-08-01), Grebe
patent: 3500759 (1968-06-01), Potter et al.
patent: 3592108 (1971-07-01), Rosaen
patent: 3791242 (1974-02-01), Bartusch
patent: 3986439 (1976-10-01), Ring
patent: 4050359 (1977-09-01), Mayer
patent: 4200011 (1980-04-01), Wilmeth
patent: 4339968 (1982-07-01), Krieger
patent: 4440046 (1984-04-01), Hirtsiefer et al.

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