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:
Mar. 19, 1991
Filed:
Oct. 10, 1989
Tsu-Hung Sun, Torrance, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A sealing system 40 for use in a cooling system 10 having a compressor with a shaft 20, at least partially disposed within a housing 12. The shaft 20 is adapted for rotational movement about the longitudinal axis 23 thereof. A working fluid is disposed within the housing 12 around the shaft 20. The sealing system 40 of the invention includes a coil 26 for moving the shaft 22 along the longitudinal axis thereof 23 from a first position to a second position. A sealing plate 42 is disposed about the shaft 22. Static seals 44, 46 are disposed about the shaft 22 between the sealing plate 42 and the housing 12. In the first position, the sealing plate 42 engages the static seals 44, 46 and the working fluid is retained within the housing 12. When the compressor is activated, the shaft 22 is translated by the coil 26 from the first position to a second position at which the sealing plate 42 is disengaged from the static seals 44, 46. Conventional dynamic seals 28 retain the working fluid when the cooling system 10 is in operation. Thus, the invention provides a sealing arrangement which extends the operating life of the cooling system by effectively retaining the working fluid thereof.