Valves and valve actuation – Tube compressors
Reexamination Certificate
2006-03-14
2006-03-14
Rivell, John (Department: 3753)
Valves and valve actuation
Tube compressors
C138S089000, C239S451000, C239S546000, C405S040000, C405S042000
Reexamination Certificate
active
07011286
ABSTRACT:
The bag valve comprises an open-ended sleeve of pliant impermeable material, one end of which is removably clamped around the down-stream open end of a conduit for fluids. The other end of the sleeve, the downstream end, can be gathered into a fully or partially closed configuration by a drawstring around the downstream sleeve end. A resilient stopper may be attached inside the downstream end of the conduit, against which the drawstring is biased when fully tightened, in order to minimize leakage from the sleeve. A cleat may be attached to the outside of the conduit for more easily securing the drawstring ends when the valve is partially or totally closed.
REFERENCES:
patent: 96862 (1869-11-01), Allen
patent: 2094707 (1937-10-01), Jones
patent: 2835272 (1958-05-01), Taupin
patent: 2959359 (1960-11-01), Casaletto
patent: 3329390 (1967-07-01), Hulsey
patent: 3624801 (1971-11-01), Gannon
patent: 3776470 (1973-12-01), Tsuchiya
patent: 3923210 (1975-12-01), Jackson
patent: 4427024 (1984-01-01), Gregory et al.
patent: 5637211 (1997-06-01), Neff
patent: 6758238 (2004-07-01), Callies
Rivell John
Turner Elsie C.
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