Dispensing pump

Details Dispensing pump Dispensing pump

1975-05-21

1976-10-19

Freeh, William L.

Dispensing

Resilient wall

Supply container delivering to receiving chamber

417479, B65D 3700

Patent

active

039866440

ABSTRACT:
A resiliently deformable diaphragm having a central domed portion surrounded by a marginal flange, has its flange clamped between opposing members of the pump housing whereby the central domed portion of the housing co-operates with one of the members to define a variable volume pump chamber. The convex side of the dome is received within a central opening in the other member and normally seats over and closes a vent port within said opening. An actuating lever fulcrumed on the housing has an arm movable upwardly through the said opening to deforming engagement with the diaphragm dome to alternately compress and to permit expansion of the dome. The inlet and outlet passages of the pump respectively extend from the pump chamber through the interfaces between the flange and the housing members and include inlet and outlet ports respectively controlled by the flange, recesses being provided in the interfaces at locations opposite the respective ports to permit deflection of portions of the flange so that they may function as inlet and outlet valves respectively.

REFERENCES:
patent: 2980032 (1961-04-01), Schneider
patent: 3061202 (1962-10-01), Tyler
patent: 3250224 (1966-05-01), Phillips et al.
patent: 3379381 (1968-04-01), Decaux
patent: 3726442 (1973-04-01), Davidson et al.
patent: 3749290 (1973-07-01), Micallef

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