Actuator of the thermal type and method for closing and sealing

Details Actuator of the thermal type and method for closing and sealing Actuator of the thermal type and method for closing and sealing

1999-03-04

2000-04-25

Nguyen, Hoang

Power plants

Motor operated by expansion and/or contraction of a unit of...

Mass is a solid

92165R, F01B 2910

Patent

active

060529938

ABSTRACT:
An actuator of the thermal type has a body, wherein a chamber is defined for containing a material which expands as a function of the temperature of said body; a shaft, having one end directly dipped into said material, the shaft being movable as a function of the increase and decrease of volume of said material; a closure and sealing device for the chamber and the shaft, including at least a closure element, configured as a washer or similar element, which is apt to cooperate mechanically with said body, at least a first sealing element, such as a bushing or similar element, which is apt to perform a first sealing on said shaft, and at least a second sealing element, such as a ring or similar element, which is apt to perform a second sealing on said shaft. The closure and sealing device has lower-support apparatus for at least one of the first sealing element and second sealing element, the lower-support apparatus being associated with the body at a pre-defined point of the latter, the closure element and lower-support apparatus delimiting a precise housing zone in the body for the first and second sealing elements.

REFERENCES:
patent: 4757751 (1988-07-01), Munoz
patent: 4946143 (1990-08-01), Bauer et al.
patent: 5079992 (1992-01-01), Bauer et al.
patent: 5213024 (1993-05-01), Huber et al.
patent: 5509269 (1996-04-01), Kuze

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