Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1994-08-05
1995-07-18
Fox, John C.
Fluid handling
Systems
Flow path with serial valves and/or closures
285 2, F16L 3728
Patent
active
054332478
ABSTRACT:
A coaxial breakaway coupling and a coaxial hose connect a fuel dispensing pump to a coaxial fuel dispensing nozzle, and the coupling includes first and second tubular valve bodies releasably coupled together by an annular canted coil spring. Each valve body supports therein an axially movable tubular valve member for defining an inner vapor return passage and an outer fuel supply passage, and a vapor return check valve member is supported for axial movement within the vapor return passage upstream of an annular valve seat. All of the valve members are spring biased towards closed positions and move to open positions when the valve bodies are coupled together. When the valve bodies are uncoupled or separate in response to an axial breakaway force, the valve members close, and suction from a vacuum pump connected to the vapor return passage pulls the check valve member towards it closed position against the valve seat. In a modification, the breakaway coupling is integrated with a 45.degree. coaxial swivel coupling connected to a coaxial fuel dispensing nozzle.
REFERENCES:
patent: 3211178 (1965-10-01), Kiszko
patent: 3570543 (1971-03-01), Ehman
patent: 4655462 (1987-04-01), Balsells
patent: 4763683 (1988-08-01), Carmack
patent: 4827960 (1989-05-01), Nitzberg et al.
patent: 5135029 (1992-08-01), Anderson et al.
patent: 5255723 (1993-06-01), Carmack et al.
patent: 5365973 (1994-11-01), Fink, Jr. et al.
"Cleaning Up" With Richard's Vacuum-Assist RESNAP Safe-T-Gards Richards Industries, Inc.
Husky Reconnectable Safe-T-Break.TM. Stops Vapor Flow, Cuts Nuisance Breaks Husky Corporation 1992.
Catlow, Inc.
Fox John C.
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