Modular jack

Details Modular jack Modular jack

1996-01-11

1997-10-28

Eley, Timothy V.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Platform type

254 93H, 254 1, 254134, B60P 116

Patent

active

056810296

ABSTRACT:
Portable, heavy duty jacks used in the railway, mining and construction industries are expensive units including a motor, a pump, a working fluid reservoir and a hydraulic cylinder, all mounted on a wheeled carriage. The jacks are moved to a use location and often left in one position for a lengthy period of time. Thus, it is often necessary to stock a large number of expensive units. A simple solution to the problem involves a single power module including a carriage, a motor, a pump and a fluid reservoir, and separate lift modules including a hydraulic cylinder. A lift module is releasably connected to the power module for moving the module to a use location, where the hydraulic cylinder is actuated to raise a load. The two modules are then disconnected, another lift module is attached to the power module, and the resulting unit is moved to another use location.

REFERENCES:
patent: 2361197 (1944-10-01), Hallinan
patent: 4434968 (1984-03-01), Smith
patent: 4534543 (1985-08-01), Gray
patent: 4865293 (1989-09-01), Ishi et al.
patent: 5121900 (1992-06-01), McDonald
patent: 5433127 (1995-07-01), Messier

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