Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Patent
1979-09-10
1981-03-31
Freeh, William L.
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
417569, F04B 2102
Patent
active
042590426
ABSTRACT:
A piston pump for mixing air into a liquid confectionary mixture uses resilient, duck-bill shaped valves in special valve bodies to provide efficient operation, easy assembly and disassembly, and easy cleaning. In one embodiment, a duck-bill valve in a central outlet passageway of a valve body functions as an outlet check valve and has an integral resilient disk portion that fits over a face of the valve body to function as a check valve for a plurality of spaced inlet passageways. In another embodiment, a duck-bill valve within an end of a cylinder of a pump is placed over a central inlet passageway, and a spool with circumferentially spaced holes is positioned about the duck-bill valve to aid in mixing confectionary mixture and air. A separate duck-bill valve as a check valve is positioned in an outlet passageway. By using only duck-bill valves in this embodiment, fruit pulp and seeds in confectionary mixtures can be readily pumped and mixed simultaneously without plugging the valves.
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Antrim Glenn H.
Freeh William L.
H & P Pump Company
LandOfFree
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