The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2000
Filed:
Mar. 04, 1999
Costanzo Gadini, Casale Monferrato, IT;
Renato Gaj, Casale Monferrato, IT;
Eltek S.p.A, Casale Monferrato, IT;
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.