Technical field and background of the invention

Details Technical field and background of the invention Technical field and background of the invention

1998-09-04

2000-05-16

Shaver, Kevin

Dispensing

With lock or fastening seal

Inhibiting actuation of discharge assistant

2223216, B67D 533, G01F 1136

Patent

active

060624337

ABSTRACT:
For upside-down operation a metering pump (8) is provided with a displaceable cylinder (16) and a valve (19) located directly at a droplet delivery orifice (15). Vent (70) for a reservoir (6) comprise a germ filter (71). For venting the medium spaces (12, 13) actuator (20) are provided which on the return stroke of the outlet valve (19) briefly crack open. For operation in the upright normal position a suction tube may be applied to the inlet (45) of the dispenser (1).

REFERENCES:
patent: 3391647 (1968-07-01), Corsette et al.
patent: 4694977 (1987-09-01), Graf et al.
patent: 4934568 (1990-06-01), Fuchs
patent: 5335823 (1994-08-01), Fuchs et al.
patent: 5377881 (1995-01-01), Jouillat
German search report in Appln. No. 197 39 989.4, dated Apr. 20, 1998.

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