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US4410133: Two way fluid switchover valve with crossover protection

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Filing Information

Inventor(s) Tatsumi Furukubo ·
Assignee(s) Toyota Jidosha Kabushiki Kaisha ·
Attorney/Agent(s) Stevens, Davis, Miller & Mosher ·
Primary Examiner William E. Tapolcai ·
Application Number US6335338
Filing date 12/29/1981
Issue date 10/18/1983
Predicted expiration date 12/29/2001
U.S. Classifications 236/345  · 236/100  ·
International Classifications F01P 702  ·
Kind CodeA
International Classifications 23634;100;34.5 ·
Foreign Priority JP5620483[U] - 02/16/1981 · JP5662051[U]JPX - 04/28/1981 ·
10 Claims, No Drawings


Abstract

A valve controls mutual communication between first, second, and third spaces, and includes a first valve seat controlled by a first valve element communicating between the first space and the second space, and a second valve seat controlled by a second valve element communicating between the first space and the third space. The first valve member is biased towards the first valve seat, and the second valve member is biased away from the second valve seat with less biasing force. A temperature sensitive actuator includes first and second actuator members and is supported between the first actuator member bearing on the first valve element and the second actuator member bearing on the second valve element. This actuator, with rise in the temperature of the fluid generally around it, moves the first and second actuator members with respect to one another so as to exert by the first actuator member a force on the first valve member which urges it away from the first valve seat, and so as to exert by the second actuator member an equal force on the second valve member which urges it towards the second valve seat. Thus communication between the first and second spaces is definitely interrupted, before communication commences to be established between the first and third spaces.

Independent Claims | See all claims (10)

  1. 1. A valve for controlling mutual communication between a first chamber space, a second chamber space, and a third chamber space, comprising:a first valve seat and a first valve element which cooperates with said first valve seat by to and fro motion towards and away from said first valve seat so as to open and close a first controlled aperture through said first valve seat, said first controlled aperture being on a first fluid flow path between said first chamber space and said second chamber space;a second valve seat and a second valve element which cooperates with said second valve seat by to and fro motion towards and away from said second valve seat so as to open and close a second controlled aperture through said second valve seat, said second controlled aperture being on a second fluid flow path between said first chamber space and said third chamber space;a first means for biasing said first valve element in a first direction away from said first valve seat;a second means for biasing said second valve element in a second direction opposite to said first direction towards said second valve seat with a biasing force substantially greater than the biasing force exerted on said first valve element by said first biasing means;a temperature sensitive actuator comprising a temperature sensitive means which senses the temperature of fluid generally around and impinging on it and changes its volume, a first actuating member and a second actuating member axially slidable in relation to each other, said temperature sensitive actuator as a whole being floatingly supported with said first actuating member bearing on said first valve element and said second actuating member bearing on said second valve element;said temperature sensitive actuator functioning so as, with rise in the temperature of said fluid sensed by said temperature sensitive means, to move said first actuating member and said second actuating member with respect to one another in such mutual relative directions as to exert by said first actuating member a force on said first valve element in said second direction, first to move said first valve element towards said first valve seat so as first to close said first controlled aperture and so as first to interrupt communication along said first fluid flow path between said first chamber space and said second chamber space, and to exert by said second actuating member a greater force on said second valve element in said first direction and secondly to move said second valve element away from said second valve seat so secondly as to open said second controlled aperture and so as secondly to establish communication along said second fluid flow path between said first chamber space and said third chamber space just after said first controlled aperture has been closed and the communication along said first fluid flow path between said first chamber space and said second chamber space has been interrupted.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US2353577 Magrum et al. Jul 1944
US2400615 UNITED AIRCRAFT PROD Warrick et al. May 1946
US2444711 YOUNG RADIATOR CO Shaw Jul 1948
US4196847 Daimler-Benz Aktiengesellschaft Gobien Apr 1980
US4280655 Standard-Thomson Corporation Duprez et al. Jul 1981
US4288031 Daimler-Benz Aktiengesellschaft Hass Sep 1981
US4344564 Gould Inc. Magnuson Aug 1982

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