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:
May. 08, 2001
Filed:
Oct. 13, 1999
Antonio J. Jepson, Dixon, CA (US);
Automatic Bar Controls, Inc., Vacaville, CA (US);
Abstract
A condiment drawback valve for a condiment dispensing system compensates for run-on from a depressurized pump during deactivation and draws back any hanging condiment left in the dispensing outlet of the system, thereby eliminating drips after the pump is stopped. The condiment drawback valve includes a continuous-flowing condiment channel fluidicly coupled between the pump and the dispensing outlet. A drawback chamber is in continuous fluid communication with the condiment channel. A spring is disposed in the drawback chamber. A piston is coupled with the spring and is movable to change the volume of the drawback chamber. When a flow gas is supplied to the pump to activate the pump during condiment dispensing, a portion of the gas is directed to the piston to push the piston against the biasing force of the spring and reduce the volume of the drawback chamber. When the flow of gas is terminated to deactivate the pump, the spring returns the piston to the rest position, increasing the volume of the drawback chamber and generating a suction to draw the condiment into the drawback chamber.