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:
Jan. 03, 1984
Filed:
Jun. 08, 1981
Applicant:
Inventor:
Stanley E Anderson, Saginaw, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C / ; F04C / ;
U.S. Cl.
CPC ...
418104 ; 418133 ;
Abstract
A remote reservoir power steering type pump has a shaft seal which prevents shaft bearing lube flow from leaking to atmosphere. The lube flow is derived from internal pump leakage along the shaft. This fluid must be returned to the main system fluid. In remote reservoir type pumps, the pressure inside the pump housing is greater than atmospheric pressure due to the supercharge gained through aspiration. The shaft seal area is maintained at substantially atmospheric pressure by bleeding or draining this area to the supply port which is not subjected to the supercharge pressure thereby maintaining the seal area at the lower pressure.