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:
May. 15, 1990
Filed:
Jul. 21, 1988
Jack Pollack, Reseda, CA (US);
Tarlochan S Mann, Northridge, CA (US);
Other;
Abstract
A fluid swivel is described, of a type which forms an annular chamber and a pair of gap passages extending in opposite directions from the chamber to the environment, with face seals along each gap passage. The fluid swivel uses a minimum number of parts and minimizes entrapment of sediment in the isolation seal lying between the chamber and the closest pressure seal. The high pressure ends of the primary and secondary seals in each gap passage, face in opposite radial directions, and the low pressure end of each secondary seal lies about as far from the axis of rotation of the swivel as the low pressure end of the corresponding primary seal. The gap passage includes a tapered portion leading from the annular chamber to the isolation seal, to enable circulation of fluid up to the isolation seal to minimize the buildup of sediment.