Inventors:
William T. Jacobs - Lynnfield MA, US
James E. Shepard - Marblehead MA, US
Kevin P. Sullivan - Wakefield MA, US
Ian Tinkler - Wakefield MA, US
Assignee:
Keurig, Incorporated - Reading MA
International Classification:
A47J 31/36
US Classification:
99302R, 99300, 99302 C, 426433
Abstract:
A beverage forming apparatus includes a storage tank, and a centrifugal pump having an inlet connected to the storage tank by a supply conduit. The centrifugal pump may include a priming vent located below a full level of the storage tank and permit air to vent as liquid primes the pump. A metering tank may have an inlet connected to the centrifugal pump by a pump conduit, and an outlet connected to a brew chamber that forms a beverage using liquid received from the metering tank. In one embodiment, a flow control valve, such as a check valve, may be provided in the pump conduit to allow flow from the pump to the metering tank, but resist flow in reverse. In another embodiment, a vent valve in the pump conduit may be arranged to vent at least a portion of the pump conduit, e. g. , to ambient air pressure.