Device for dispensing foam, and push-button for a device of this

Details Device for dispensing foam, and push-button for a device of this Device for dispensing foam, and push-button for a device of this

1992-04-27

1994-03-01

Huson, Gregory

Dispensing

With filter

Associated with vent passage

222190, 222209, 222401, 222631, 222633, 239333, 239370, B67D 558

Patent

active

052899527

ABSTRACT:
The device comprises a pump (10) for delivering a liquid with a foaming agent from a container (R). The displacement of a rigid push-button (14) causes a variation in the volume of an annular chamber (13), and a return air inlet valve (22) allows for the inflow of air into this chamber. The end of the container (R) provided with the pump (10) is closed by a head (5) having a base (7) recessed with respect to the end of a central sleeve (8) carrying the pump and partly delimiting the said annular chamber (13), while the push-button (14) has in its base a collar (17) capable of closing the annular chamber (13) and compressing the air contained therein.

REFERENCES:
patent: 3860150 (1975-01-01), Maier
patent: 4057176 (1977-11-01), Horvath
patent: 4179049 (1979-12-01), Umstead
patent: 4214677 (1980-07-01), Bauer et al.
patent: 4880161 (1989-11-01), Wright
patent: 4957218 (1990-09-01), Ford, Jr.

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