Manually actuated dispensing pump

Details Manually actuated dispensing pump Manually actuated dispensing pump

1987-06-19

1988-05-31

Huppert, Michael S.

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

222341, 239333, 239526, 417435, B67D 540

Patent

active

047475234

ABSTRACT:
A manually actuated dispensing pump having a pump body extending transversely above a closure cap adapted for mounting the body at the upper end of a container, has an outwardly open pump cylinder for the reception of a reciprocable piston having spaced piston seals. To facilitate pump priming, the inboard seal is positioned relative to the inlet port so that the inboard seal overlies the inlet port at a predetermined position during the inward pressure stroke of the piston to permit flow of entrapped air from the pump chamber outwardly of the pump cylinder via the annular chamber defined between the piston seals.

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patent: 4489890 (1984-12-01), Martin
patent: 4618077 (1986-10-01), Corsette
patent: 4624413 (1986-11-01), Corsette
patent: 4669664 (1987-06-01), Garneau
patent: 4674659 (1987-06-01), Micallef

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