Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – By shaft speed or torque responsive means
Reexamination Certificate
2006-03-30
2009-08-18
Cronin, Stephen K (Department: 3747)
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
By shaft speed or torque responsive means
C137S056000, C123S520000
Reexamination Certificate
active
07575410
ABSTRACT:
A self-opened type valve is opened by motor torque of an electric motor. Therefore, a diaphragm is not necessary for opening the valve, and downsizing of a valve drive apparatus for opening the valve is possible. Since the valve is assembled to the motor shaft of the electric air pump via a motion-direction conversion mechanism, an opening action of the valve can start in a short time after a rotational action of the impeller of the electric air pump starts, so that control responsiveness is improved. At a rotation stop of the impeller of the electric air pump, the valve can be maintained in a fully closed condition by an urging force of the coil spring, thereby preventing exhaust gases or condensed water from entering into an inside of the electric air pump.
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Kobayashi Yasunori
Nakamura Hiroshi
Tsuzuki Kunihiro
Uchida Akikazu
Yokoyama Shinichi
Cronin Stephen K
Denso Corporation
Nixon & Vanderhye PC
Vilakazi Sizo B
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