Flow control device

Details Flow control device Flow control device

1991-03-13

1991-10-29

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Having means to produce digital pulses

25112911, 251266, F16K 3104

Patent

active

050609106

ABSTRACT:
A flow control device wherein a valve member is reciprocated linearly by the rotation of a rotor of a stepping motor to change the flow rate of air flowing through an air passage in a housing. To the rotor of the stepping motor is fixed a shaft having external threads. A guide member with a valve member fixed thereto has internal threads for threaded engagement with the external threads of the shaft and also has a stepped, axial bore for fixing the valve member. The valve member is fixed at a sleeve portion thereof to the stepped, axial bore of the guide member. An annular sliding bearing and a wave washer are inserted between the stepped portion of the axial bore of the guide member and an end face of the sleeve portion of the valve member. A small gap is formed between the inner wall of the axial bore of the guide member and the outer peripheral surface of the sliding bearing and also between the outer peripheral surface of the shaft and the inner peripheral surface of the sliding bearing, thereby permitting the sliding bearing to move radially and axially with respect to the shaft.

REFERENCES:
patent: 4723753 (1988-02-01), Torimoto et al.

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