Material or article handling – Self-loading or unloading vehicles – Conveyor
Patent
1984-12-19
1987-02-10
Werner, Frank E.
Material or article handling
Self-loading or unloading vehicles
Conveyor
91516, 91517, B65F 300
Patent
active
046420193
ABSTRACT:
A hydraulic control system is provided, including first and second bidirectional fluid actuated motors adapted to travel a predetermined amount in each direction. A directional control valve is placed in fluid communication with a supply of high pressure, hydraulic fluid and a reservoir and has a first operating position for directing the supply of fluid to the motors in a first direction of flow and a second operating position for directing the supply of fluid to the motors in a direction of flow opposite to the first direction of flow. A combination sequence and regeneration valve is in continuous fluid communication with the supply and the second motor for preventing the operation of the second motor until the first motor has reached its limit of travel and for regenerating fluid from one side of the second motor to the other side when the first motor has reached its limit of travel and the control valve is in its second operating position. The directional control valve and the combination sequence and regeneration valve are contained within a common housing having three motor passageways. The first two motor passageways cooperate with the directional control valve for providing bidirectional flow to the motors. The third motor passageway is in fluid communication with the combination sequence and regeneration valve for preventing fluid communication between the third motor passageway and the valve inlet passageway when the pressure on the inlet passageway is below a predetermined amount and for permitting fluid communication between the third motor passageway and the inlet passageway when the pressure in the inlet passageway exceeds that predetermined amount.
REFERENCES:
patent: 2916050 (1969-12-01), Ruhl
patent: 2988106 (1961-06-01), Rue
patent: 3006372 (1961-10-01), Ruhl
patent: 3107547 (1963-10-01), Vermeulen
patent: 3200841 (1965-08-01), Beutler
patent: 3229717 (1966-01-01), Rice
patent: 3410427 (1968-11-01), McCarthy
patent: 4073393 (1978-02-01), McKenzie et al.
patent: 4180365 (1979-12-01), Herpich et al.
Dempster Systems Inc.
General Signal Corporation
Huberfeld Harold
Miller, Jr. William G.
Werner Frank E.
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