The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 1991
Filed:
Mar. 31, 1988
Ronald J Mrugala, Rockford, IL (US);
Doyle Raymer, Davis, IL (US);
Dipak J Negandhi, Freeport, IL (US);
Robert L Latzko, Wauwatosa, WI (US);
Scotsman Group, Inc., Vernon Hills, IL (US);
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.