Motors: expansible chamber type – With motive fluid valve – Both inlet and exhaust controlled by motive fluid pressure...
Reexamination Certificate
2006-08-22
2008-11-04
Leslie, Michael (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
Both inlet and exhaust controlled by motive fluid pressure...
C091S444000, C091S449000, C091S459000, C091S461000
Reexamination Certificate
active
07444920
ABSTRACT:
The valve arrangement for the activation of a structural element has three inlet switching valves through which a pressure-loaded medium can be conducted. These inlet switching valves are connected on their inflow side to a pressure supply by inflow lines and are arranged parallel to one another in flow terms. Moreover, the valve arrangement has a connection element, which is connected to outflow sides of all the inlet valves by pressure lines. A control line acted upon by the medium is connected to the pressure supply. The three switching-valve groups can be activated by the control line, and in each case two switching valves and in each case one inlet switching valve are assigned to each switching-valve group. A activation valve can be interposed in each case between a switching-valve group and the control line. Three outflow lines for the medium can be arranged between an outflow location for the medium and the connection element. The switching valves of each outflow line can be actuated by different activation valves.
REFERENCES:
patent: 3954249 (1976-05-01), Gratzmuller
patent: 4640095 (1987-02-01), Engel et al.
patent: 5476030 (1995-12-01), Plettner
patent: 43 30 038 (1995-03-01), None
patent: 43 36 074 (1995-04-01), None
patent: 0 641 919 (1995-03-01), None
*German Search Report dated Feb. 7, 2006 (with English translation of category of cited documents).
Herrmann Tobias
Warmuth Wolfgang
ABB Patent GmbH
Buchanan & Ingersoll & Rooney PC
Leslie Michael
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