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:
Mar. 21, 1995
Filed:
Jan. 12, 1994
Wilbur Shapiro, Schenectady, NY (US);
Dresser-Rand Company, Olean, NY (US);
Abstract
A face seal with hydrodynamic thrust pads assembly is provided. The assembly comprises a ring structure with a front side facing in an axial direction that has a seal face continuous about the ring structure and a plurality of cut-outs with concave surfaces spaced concentrically around the seal face. A plurality of elastomeric laminates having a convex side are disposed in the concave surfaces. A plurality of thrust pads are bonded to the laminates such that one side of the thrust pads are all in a plane parallel to the plane of the seal face. When a closing load is transmitted against an opposing member by the sealing pressure against the back face of the assembly while the opposing member rotates relative to the assembly, friction and pressure forces cause the thrust pads to swing about a pivot point located towards the opposing member such that the fluid film converges in the direction of movement of the opposing member. Simultaneously, the seal face seals against the opposing member.