Liquid dispensing pump

Details Liquid dispensing pump Liquid dispensing pump

B - Operations, Transporting

05

B

222/77

B05B 11/00 (2006.01)

Patent

CA 1154412

APPLICATION OF RICHARD KEVIN O'NEILL FOR I LIQUID DISPENSING PUMP ABSTRACT OF THE DISCLOSURE A liquid dispensing pump includes a one-piece piston capable ¦ of not only effecting a pumping operation but also an outlet valve opening and closing function upon limited relative axial movement. In one embodiment, the piston reciprocates and forms a valve seat for a container vent opening extending through a closure cap provided on the pump body, and in another embodiment, the pump cylinder reciprocates and forms a valve seat for opening and closing the container vent opening. The pump chamber defined by the cylinder has a valved inlet which may be formed by a sleeve depending from the piston and an upstanding conduit in the cylinder or may be formed by a ball check valve in the cylinder.

375274

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