Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1979-08-16
1981-04-21
Bartuska, F. J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 26, 182141, B66B 1104
Patent
active
042627770
ABSTRACT:
A self-contained elevator structure including a pair of vertical, laterally spaced, parallel standards mounting a carrier or carrying cage for vertical travel therealong. Movement of the cage is effected by a multiple-sheave system actuated by a hydraulic piston and cylinder unit in turn controlled by three selectively operated switches, respectively at the top and bottom of the elevator structure, and on the traveling cage itself. The cage switch is capable of activation only when the cage gates or retaining bars are closed. The structure is positionable parallel to and closely adjacent a drilling rig platform with the control system for the vertically traveling cage enabling a stopping of the cage, and access to the rig platform, at any point along the vertical travel of the cage. Safety features include physically actuatable brakes provided on the cage, the use of switches which require constant pressure for actuation, and safety cables and braces between the rig and the standards.
REFERENCES:
patent: 605820 (1898-06-01), Hancock
patent: 759087 (1904-05-01), Foley
patent: 2232890 (1941-02-01), Stillwagon
patent: 2966996 (1961-01-01), Friend, Jr.
patent: 3329240 (1967-07-01), Harwood et al.
patent: 3500963 (1970-03-01), Beutler
patent: 3592294 (1971-07-01), Allen
patent: 3672471 (1972-06-01), Badding
patent: 3934681 (1976-01-01), Herrell
Bartuska F. J.
Noland Kenneth
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