Dispensing – With discharge assistant – With biasing means for discharge assistant and/or its casing
Patent
1991-03-13
1992-03-03
Huppert, Michael S.
Dispensing
With discharge assistant
With biasing means for discharge assistant and/or its casing
222321, 222385, 239333, 417559, B65D 8854
Patent
active
050924958
ABSTRACT:
A precompression pump for discharging a liquid in spray form has a first inner compression chamber formed within a pump body between a valve for closing an orifice through which liquid is withdrawn from a storage container and a discharge orifice through which the withdrawn liquid is expelled to a spray-discharge head. The volume of the first chamber is variable by means of a driving piston which is continuously urged by a first helical spring towards a position corresponding to the maximum volume. A second intermediate chamber is located between the first chamber and the discharge orifice, this orifice being shut-off by a needle-valve piston which forms the precompression system. The needle-valve piston is mounted within a moving element but outside the first chamber and urged by a second helical spring to a position of closure of the discharge orifice. A free-running piston is thrust by flexible tongues to a position in which it cuts-off the communication between the first inner chamber and the second chamber.
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patent: 4944432 (1990-07-01), Jouillat
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patent: 5002207 (1991-03-01), Giuffredi
Huppert Michael S.
Huson Gregory L.
Lindal Verpackungstechnik GmbH & Co. KG
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