Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1995-03-08
1997-09-16
Nguyen, Hoang
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
296117, F15B 1100
Patent
active
056668732
ABSTRACT:
An operating system for hydraulic drive elements of a folding top, such as a lowerable folding top of a convertible, can be actuated by switching apparatus. The drive elements are fed by a pressure source from a pressure medium reservoir via an inlet and connected to a return to the pressure medium reservoir. Switchable directional control valves distribute the pressure generated by the pressure source to the drive elements moving various parts. Actuation of the directional control valves corresponds to a given sequence of movements of the top. To simplify the operating system, a plurality of operational elements assigned to various operating functions can be switched at the same time by individual directional control valves. As a result, a smaller number of expensive directional control valves is required.
REFERENCES:
patent: 3312058 (1967-04-01), Shelhart
patent: 3945206 (1976-03-01), Krause
patent: 4161135 (1979-07-01), Garlinghouse
patent: 4485725 (1984-12-01), Tootle
patent: 5253575 (1993-10-01), Claar et al.
Lindmayer Martin
Schrader Juergen
van de Poel Frank
Mercedes-Benz AG
Nguyen Hoang
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