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:
Feb. 19, 1991
Filed:
Oct. 04, 1989
Applicant:
Inventor:
Roger C Weatherston, East Amherst, NY (US);
Assignee:
Copeland Corporation, Sidney, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01C / ; F01C / ; F16C / ; F16C / ;
U.S. Cl.
CPC ...
418 556 ; 418 88 ; 384121 ; 384123 ;
Abstract
A scroll-type machine which incorporates a self-pressurizing hydrodynamic thrust bearing to maintain a constant interface of oil between the axial thrust surfaces.