Multi-stage hydraulic drive system

Details Multi-stage hydraulic drive system Multi-stage hydraulic drive system

1985-09-27

1987-08-04

Rolla, Joseph J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

414630, B66B 920

Patent

active

046839887

ABSTRACT:
A hydraulic drive system has a pair of cylinder/piston assemblies cascaded together and interfaced by a frame. The two assemblies are parallel, but not co-axial, so that in retracted position they may reside side-by-side, thereby minimizing the longitudinal space required to accommodate the system when in retracted position. Lateral torque resulting from the offset between the axes of the two cylinder/piston assemblies is resisted by causing the interfacing frame to slide against and ride between a pair of longitudinal rails, which resist the lateral forces resulting from the torquing of the frame.

REFERENCES:
patent: 2821264 (1958-01-01), Ulinski
patent: 3276549 (1966-10-01), Ramsey
patent: 3534664 (1970-10-01), Ulinski
patent: 4219302 (1980-08-01), Leskovic
patent: 4357994 (1982-11-01), Hall
patent: 4363380 (1982-12-01), Rued et al.

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