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:
Oct. 06, 1981
Filed:
Dec. 11, 1978
Applicant:
Inventor:
Frederick D Ezekiel, Lexington, MA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277 80 ; 3081871 ; 3081872 ; 335303 ;
Abstract
A magnetic liquid seal comprises a single axially magnetized permanent magnet in the shape of a flat washer having magnetic liquid captured on the inside or outside diameters, or both. Leakproof sealing is achieved between either the outside diameter and an external housing or between the inner diameter and an external shaft.