Lubricant fitting for a valve

Details Lubricant fitting for a valve Lubricant fitting for a valve

1980-11-19

1982-10-19

Chambers, A. Michael

Fluid handling

Systems

Flow path with serial valves and/or closures

13761419, 1376142, 137322, 2511496, 251339, F16L 3728

Patent

active

043545238

ABSTRACT:
A lubricant fitting (10) for connection to a valve (V) in which the fitting bore (20) has a pair of spaced apart inner (44) and outer (26) annular shoulders therein. A pair of spaced apart inner (52) and outer (54) seating elements are positioned within the bore (20) for movement between a normal seated position and an unseated position relative to their respective shoulders (44, 26) to thereby either prevent or allow communication between the valve interior and the atmosphere. The outer seating element (54) moves to the seated position independently of the inner seating element (52) so that even if the inner seating element (52) is sufficiently contaminated so that an effective seal cannot be formed, the outer seating element (54) will still move to form an effective seal and thereby isolate the valve interior from the atmosphere.

REFERENCES:
patent: 370250 (1887-09-01), Establie
patent: 1376868 (1921-05-01), Gibson
patent: 1612168 (1926-12-01), Benchenstein
patent: 1865231 (1932-06-01), Buck
patent: 2497758 (1950-02-01), Campbell
patent: 2620817 (1952-12-01), Blaydes
patent: 2905487 (1959-09-01), Schifter
patent: 3171440 (1965-03-01), Napolitano
patent: 3448760 (1969-06-01), Cranaze
patent: 3563267 (1971-02-01), Thompson
patent: 3791412 (1974-02-01), Mays
patent: 3794289 (1974-02-01), Taylor

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