Title:
PHERMOELEMENT
Document Type and Number:
Japanese Patent JP3691919
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve responsiveness of movement of a piston, and enable smooth and accurate reciprocation of the piston along an axis by forming thick portions and thin portions on a part of a sleeve which is embedded in a thermal expansion body.
SOLUTION: Frictional resistance is reduced between a piston 3 and a sleeve 4 for smooth reciprocation of the piston 3. In order to this, projections 4c are formed on an inner peripheral surface of the sleeve 4 for reducing contact area. Thick portions 4a and thin portions 4b are alternatively formed along an axis of the piston 3, on one end of the sleeve 4 to be inserted into a thermal expansion body. Expansion of the thermal expansion body is transmitted through the thin portions 4b for moving the piston 3. Twisting rigidity of the sleeve 4 is kept constant by means of rib-like thick portions 4a, for preventing the sleeve 4 from being twisted at the time of reciprocation. It is thus possible to secure smooth and accurate reciprocation of the piston 3, and satisfactory timing of operation for a long time.
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| JPS58113223 | 【考案の名称】始動電動機用スイツチ |
Inventors:
Takahashi
Akira Mori
Akira Mori
Application Number:
JP32149796A
Publication Date:
September 07, 2005
Filing Date:
December 02, 1996
Export Citation:
Assignee:
Japan Thermostat Co., Ltd.
International Classes:
F01B27/00; F16K17/38; F16K31/68; (IPC1-7): F16K31/68; F01B27/00; F16K17/38
Domestic Patent References:
| JP5296140A | ||||
| JP6294478A | ||||
| JP53091038U | ||||
| JP61194866U | ||||
| JP1070193U |
Attorney, Agent or Firm:
Isono Dozo