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. 05, 1987
Filed:
Aug. 30, 1985
Andrew C Harvey, Waltham, MA (US);
Brian J Doherty, Marblehead, MA (US);
Foster-Miller, Inc., Waltham, MA (US);
Abstract
A fluid swivel system of the type suitable for use with a single point mooring system and the like includes mandrel structure that defines a through flow path from a coupling to a port in an outer cylindrical interface surface, a port in the outer interface surface. Generally toroidal structure surrounds and is mounted for rotation relative to the mandrel structure, the toroid structure having an inner cylindrical interface surface in juxtaposed relation to the interface surface of the mandrel structure. The mandrel and toroid structures cooperate to define a through flow passage between the mandrel coupling and a toroid port in the external surface of the swivel and further cooperate to define an annular seal chamber between the juxtaposed interface surfaces on either side of the through passage. Metal seal ring structure is disposed in each seal chamber, each seal ring structure having first and second sealing surfaces for engaging corresponding seal chamber defining surfaces of the mandrel and toroid structures respectively, and each sealing surface has relatively hard and soft portions. Bearing structure between the mandrel and toroid structures is located so that each seal chamber is between the adjacent bearing structure and the through passage.