Dispensing – Automatic control – Material level control
Patent
1988-03-31
1991-08-27
Shaver, Kevin P.
Dispensing
Automatic control
Material level control
222380, 2221461, B67D 510
Patent
active
050426893
ABSTRACT:
The vent on demand system for bottled water coolers employs a suction wand having water suction tube, vent tube and air pressure tube for sensing the water level within the bottle. The plumbing system is only exposed to atmospheric air during water dispensing. Air pressure trapped within a bulb well located at the lowermost end of the wand responds to water level within the bottle by changing air pressure which is sensed by a pressure switch employed to disengage the pump when water levels approach empty. A check valve prevents air from entering the water suction tube during bottle replacement and the vent tube is coupled through a vent valve which maintains the water delivery system in a sealed state, only venting to atmosphere during actual water delivery. The vent valve is simultaneously actuated when either hot or cold water buttons are depressed with the pump being actuated momentarily thereafter.
REFERENCES:
patent: 2113046 (1938-04-01), Freemon
patent: 3269143 (1966-08-01), Gasparovich
patent: 3333374 (1967-08-01), Radcliffe
patent: 3969909 (1976-07-01), Barto et al.
patent: 4007856 (1977-02-01), Murphy et al.
patent: 4269333 (1981-05-01), Nakai et al.
patent: 4456149 (1984-06-01), Sciortino
patent: 4655123 (1987-04-01), Schrader
Latzko Robert L.
Mrugala Ronald J.
Negandhi Dipak J.
Raymer Doyle
Derakshani Philippe
Scotsman Group, Inc.
Shaver Kevin P.
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