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. 24, 1984
Filed:
Jun. 13, 1983
Masahiro Sugiyama, Hiratsuka, JP;
Keeper Co., Ltd., Tokyo, JP;
Abstract
An oil seal assembly 1 for forming a seal between a wall of a machine housing 3 and a rotatable shaft 10 extending through said wall to prevent a fluid from leaking from inside to the outside of said housing through the gap between said wall and said shaft. The oil seal assembly comprises an elastic seal ring 7 made of an elastic material and having a base portion for fitting to the wall, a lip portion 5 with a lip edge 8 for resilient sliding contact with the surface of the shaft, and a lip neck portion 6 through which the lip portion is connected to the base portion. The oil seal assembly further comprises a reinforcement ring 4 made of a comparatively stiff material and associated with said base portion of said elastic seal ring. A backup ring 2 is made of a synthetic resin and seated in a gap formed between the inner peripheral surface of the lip neck portion and the radially inward portion of the reinforcement ring without being bonded to the lip neck portion and to the radially inward portion of said reinforcement ring.