Control system

Details Control system Control system

1975-12-18

1977-08-16

Cohen, Irwin C.

Motors: expansible chamber type

Differential

Opposing pressure applied by bypassing

91417R, 91422, F15B 13042, F15B 1517

Patent

active

040418405

ABSTRACT:
In a control system of the type having a hydraulic cylinder, a piston slidable in the cylinder and dividing the interior thereof into a first and a second pressure chamber, a pressure fluid reservoir, a pump, conduits having a valve interposed therein which is electronically controlled and connects the second chamber with the reservoir or pump, respectively, or block the second chamber, and an auxiliary device for operating the system in the event the electronic control for the valve malfunctions, the invention provides a movable member extending into the second chamber; subdividing means located in the second chamber intermediate the movable member and the piston and subdividing the second chamber into a first and a second compartment, the movable member being operable to shift the subdividing means in the second chamber; and valve means controlling communication between the compartments and of the same with the first chamber, the valve means forming with the piston and with the movable member a follow-up control.

REFERENCES:
patent: 3882759 (1975-05-01), Formwalt et al.
patent: 3905278 (1975-09-01), Ourdouillie

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