Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1983-03-23
1984-10-23
Levy, Stuart S.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254360, B66D 148, B66D 108
Patent
active
044783906
ABSTRACT:
Fluid-operated apparatus is provided for handling and lifting loads of various weights. The apparatus includes a fluid-operated hoist with an elongate member extending therefrom to a load-carrying unit. A pilot fluid-controlled regulator supplies fluid to the hoist and a load-responsive, pilot fluid regulator is carried by the load-carrying unit and supplies pilot fluid to the pilot fluid-controlled regulator. The pilot fluid is varied according to the weight of a load so that the pressure of the fluid supplied to the hoist is accordingly varied by the pilot fluid-controlled regulator to automatically balance the load carried by the load-carrying unit. The load can also be lifted by bypassing the pilot fluid-controlled regulator and controlling flow of fluid to the hoist by a manually-adjustable flow control valve. The apparatus also can include a brake for preventing the elongate member from moving up or down while loads are being changed or are at rest.
REFERENCES:
patent: 3260508 (1966-07-01), Powell
patent: 3325148 (1967-06-01), Powell
patent: 3384350 (1968-05-01), Powell
patent: 3428298 (1969-02-01), Powell
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patent: 3526388 (1970-09-01), Geiger et al.
patent: 3656715 (1972-04-01), Powell
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patent: 3933388 (1976-01-01), Conboy
Fox Albert D.
Kish Robert J.
Knight Donn C.
D. W. Zimmerman Mfg. Inc.
Gutchess, Jr. Allen D.
Jaekel Katherine
Levy Stuart S.
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