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. 20, 1976
Filed:
May. 22, 1975
Applicant:
Inventors:
Harry G Olsen, Woburn, MA (US);
Peter Oberhauser, Sudbury, MA (US);
Assignee:
GTE Laboratories Incorporated, Waltham, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16C / ;
U.S. Cl.
CPC ...
308 361 ;
Abstract
A rotating vacuum shaft assembly includes a housing, a hollow shaft positioned in an opening in the housing and at least one seal made of a fluorocarbon polymer material disposed in the region around the shaft to permit a vacuum to be drawn through the shaft while it is rotated. The seal has deformable ribs which contact the surface of the shaft and the internal walls of the housing, the ribs deforming when a pressure difference exists across the seal thereby enhancing the quality of the seal.