Precompression metering-proportioning pump enabling its efficien

Details Precompression metering-proportioning pump enabling its efficien Precompression metering-proportioning pump enabling its efficien

1991-08-07

1993-01-05

Kashnikow, Andres

Dispensing

With discharge assistant

With movable nozzle interconnected therewith

222385, 137854, 417550, G01F 1130

Patent

active

051762960

ABSTRACT:
Product admission into the working chamber 23 of a precompression pump is accelerated by providing a differential piston 4 with a bore 63 which establishes communication between the inside of a skirt 42 and a shoulder 44. A cylindrical sealing element 60 is fitted over a spindle 41 to be applied against the shoulder 44, level with two annular contacts 64, 65 between which the bore terminates. The sealing element closes the bore on discharge of the precompressed product dose. The sealing element is configured such that, particularly when the pump is idle, it is kept deformed and is therefore applied to the shoulder 44 with sufficient force to guarantee the seal of the two annular contacts 64, 65.

REFERENCES:
patent: 3991914 (1976-11-01), Kotuby et al.
patent: 4089442 (1978-05-01), Hafele et al.
patent: 4262823 (1981-04-01), Monden
patent: 4856677 (1989-08-01), Brunet et al.
patent: 4896799 (1990-01-01), Giuffredi
patent: 4966535 (1990-10-01), Lina et al.
patent: 5105994 (1992-04-01), Jouillat et al.

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