Backup seals in rotary pumps

US8690534B1 · kind B1 · utility

Assignee

• CURTISS-WRIGHT ELECTRO-MECHANICAL CORPORATION · US

Inventors

• David J. Janocko · Wilkinsburg, US
• Charles D. Bice · Butler, US

Key dates

• Filing date: Jun 8, 2009
• Grant date: Apr 8, 2014
• Expiry date: Apr 15, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16J15/46
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Arrangements for promoting the restriction of fluid flow along a shaft via providing a deformable ring member in an annulus between the shaft and housing. In an initial general condition, the deformable ring member permits free fluid flow in a general direction along the shaft while in a second, constricted condition, the deformable ring closes or blocks a gap or clearance normally conducive to free fluid flow to thereby restrict fluid flow. An actuation medium, which can take any of a very wide variety of forms, preferably promotes constriction of the deformable ring member directly or indirectly.