Patent · US Active

Pressure balanced spring loaded overtravel sealing apparatus

US9194501B2 · kind B2 · utility

2Cited by

10References

20Claims

0Family size

Assignee

Dresser, LLC · US

Inventors

Thomas Henry Cunningham · North Easton, US
Christopher Edward Wolfe · Schenectady, US
Nuo Sheng · Schenectady, US
Xuele Qi · Niskayuna, US
Azam Mihir Thatte · Kensington, US
James Stares · Norton, US
Henry W. Boger · Foxborough, US

Key dates

Filing date	Nov 20, 2012
Grant date	Nov 24, 2015
Priority date	—
Expiry date	Jan 1, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7937
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An apparatus includes a cage and a main plug disposed in the cage. The main plug is movable between a main plug closed position and a main plug open position. A seal assembly disposed on the main plug, the seal assembly having a seal that is configured to contact the cage when the main plug is in the main plug closed position, and configured to reduce contact with the cage when a pressure differential across the seal is reduced. The apparatus includes a pressure balancing assembly movable between a closed position, an overtravel position and an open position. The pressure balancing assembly is configured to balance the pressure differential across the seal when in the overtravel and open position.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.