Motors: expansible chamber type – Independently operated timer – delay – pattern or cyclic control – Of independently movable working members
Patent
1988-10-13
1990-03-13
Joyce, Harold
Motors: expansible chamber type
Independently operated timer, delay, pattern or cyclic control
Of independently movable working members
91356, 13762565, 25112904, F15B 2102
Patent
active
049074903
ABSTRACT:
Apparatus for controlling a vehicle climate control system having pneumatic passages provided with doors or baffles to regulate the flow of conditioned air to the passenger compartment. The passage or passages are selected by positioning a valve that couples a pneumatic source to one or more of the door or baffle operators. The position of the valve is determined by an electric motor that has applied thereto an energizing voltage from a control bridge circuit which also has applied thereto a feedback voltage which changes in response to operation of the motor. Movement of the valve to a selected position causes the feedback voltage to equal the energizing voltage, whereupon the motor is deenergized and movement of the valve terminates.
REFERENCES:
patent: 3983930 (1976-10-01), Franz
patent: 4346729 (1982-08-01), Franz
patent: 4408278 (1983-10-01), Saito et al.
patent: 4679588 (1987-07-01), Raab et al.
patent: 4736670 (1988-04-01), Czarnecki
Baker Benjamin H.
Taylor David W.
Cirtek Corporation
Joyce Harold
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