Three-way electromagnetic valve

Patent 5038826 Issued on August 13, 1991. Estimated Expiration Date:

October 26, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3680782

Electromagnetic control injection systems for diesel engines of the pressure-time type where the injector needle is controlled by the charging and discharging of a chamber
Patent #: 4545352
Issued on: 10/08/1985
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Issued on: 01/19/1988
Inventor: Amann , et al.

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Patent #: 4777921
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Cylindrical guide device with operating play compensation for fuel injection system Patent #: 4928887
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Inventor: Miettaux

Inventors

Assignee

Nippondenso Co., Ltd.

Application

No. 428297 filed on 10/26/1989

US Classes:

137/625.65, Motor-operated137/625.25Reciprocating valve

Examiners

Primary: Michalsky, Gerald A.

Attorney, Agent or Firm

Cushman, Darby & Cushman

Foreign Patent References

0319371 EP. 06/23/1989
2051944 DE. 05/23/1971
2920702 DE. 11/23/1980
8529255 DE. 10/23/1985
59-165858 JP. 09/23/1984

International Class

F15B 013/044

Foreign Application Priority Data

1988-10-27 JP

Abstract

A three-way electromagnetic valve provided with a valve body, a movable member slidably disposed in the valve body, an actuator for driving the movable member, an opening-closing mechanism provided in an internal passage formed in the movable member. A clearance reducing portion is formed to reduce a gap created by a pressurized fluid entering the slide section or by the force of fastening and fixing the valve body, thereby limiting the leakage of the pressurized fluid.