Single-piece piston for use in a pneumatically-activated pump

Details Single-piece piston for use in a pneumatically-activated pump Single-piece piston for use in a pneumatically-activated pump

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 53/14 (2006.01) F04B 13/00 (2006.01) F16N 13/04 (2006.01) F16N 27/00 (2006.01)

Patent

CA 2214604

A single-piece piston used in a pneumatically-activated pump for metering predetermined amounts of liquids. The piston includes a head portion and a circumferentially-disposed channel for containing a sealing member. The stem section includes a longitudinally-disposed channel in fluid-flow connection with the channel. The piston is disposed within the pump body chamber. Lateral movement of the piston causes the sealing member to shift and block and unblock the end of the longitudinal channel allowing liquid to flow into a slot and to a pump chamber adjacent to the piston's head. The piston operates in association with an assembly for regulating the amount of liquid metered by the pump, a valve assembly for evacuating the liquid from the pump chamber into an outlet fitting, and a mechanism for regulating the flow of air into the outlet fitting to atomize the liquid. The piston operation can be calibrated for precise liquid metering.

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