Double acing pump

Details Double acing pump Double acing pump

B - Operations, Transporting

65

D

222/77

B65D 47/34 (2006.01) B05B 11/00 (2006.01) B05B 11/02 (2006.01)

Patent

CA 2015860

ABSTRACT OF THE DISCLOSURE A double acting trigger pump on a container includes a cylinder and a piston reciprocal therein that cooperate in providing a primary pump chamber. An inlet valve regulates product being drawn into the primary pump chamber. A double piston seal is at the inner end of the piston and includes an outlet valve coaxial with a longitudinal bore in the piston. A supplemental pump chamber that also communicates with the bore is defined between outer surfaces of the piston and inner surfaces of the cylinder as well as the double piston seal and a rearward retaining ring. During the pressure stroke of the piston, product is dispensed from the primary pump chamber out from the pump and fills the supplemental pump chamber. During the suction stroke of the piston, product is drawn into the primary pump chamber from the container and product is discharged from the supplemental pump chamber out from the pump.

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