Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1989-06-14
1990-07-24
Chambers, A. Michael
Fluid handling
Systems
Flow path with serial valves and/or closures
13761403, 13761404, 137270, 2511495, F16L 3728
Patent
active
049429019
ABSTRACT:
A fluid cutoff device in a line, includes a first coupling having a generally cylindrically shaped outer body, and a hollow generally cylindrically shaped inner body with a first inner sealing surface. The first coupling includes a first shutter valve adapted to be normally biased closed to abut against the first sealing surface to cut off fluid flow through the first coupling. The device includes a second coupling having a generally cylindrically shaped outer body adapted to sealably translate within the inner body of said first coupling, and a hollow generally cylindrically shaped inner body with a second inner sealing surface. The second coupling includes a second shutter valve and is adapted to be normally biased closed against the second sealing surface to cut off fluid flow through the second coupling which is engagable with the second shutter valve and a second actuation means within the second coupling engagable with the first shutter valve adapted to separate the respective shutter valve from the respective sealing surface to open the couplings.
REFERENCES:
patent: 520239 (1894-05-01), Merrick
patent: 1690216 (1928-11-01), Davis
patent: 1968075 (1934-07-01), Ewald
patent: 2044252 (1936-06-01), Mitchell et al.
patent: 2457251 (1948-12-01), Main, Jr.
patent: 2509444 (1950-05-01), Mitchell
patent: 3441055 (1969-04-01), Pickell
Akers Lawrence C.
Chambers A. Michael
Richardson Peter C.
Turner Roger C.
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