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
1980-06-20
1982-08-24
Jillions, John M.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254315, B66D 126
Patent
active
043457428
ABSTRACT:
A hydraulic yarding system in which the haulback and main drum are coupled to a primary drive motor and provided with a hydraulic interlock motor coupled to a planetary set in the haulback drive in an open loop hydraulic circuit. The hydraulic fluid from the interlock motor can be diverted to the hydraulic circuit for the primary drive motor through a pressure sequence valve and a directional valve. In this manner, regenerative driving of the interlock motor by the load pumps fluid from the interlock circuit selectively in the desired direction to the primary drive motor and supplements the power available to the primary drive motor. A preferred embodiment utilizes two pressure sequence valves in circuits to either the in-haul or out-haul fluid flow directions for the primary drive motor so that a diversion of fluid from the interlock circuit can occur at a lower pressure valve during out-haul.
REFERENCES:
patent: 3346237 (1967-10-01), Erickson et al.
patent: 3963217 (1976-06-01), Dwight
patent: 4058295 (1977-11-01), Morfitt
patent: 4088304 (1978-05-01), Gradert
Jillions John M.
Lantec Industries Ltd.
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