Fluid dispenser with shut-off drip protection

Details Fluid dispenser with shut-off drip protection Fluid dispenser with shut-off drip protection

1993-11-16

1995-09-05

Huson, Gregory L.

Dispensing

Processes of dispensing

222148, 222571, B67B 700

Patent

active

054472547

ABSTRACT:
A dispenser which prevents dripping and drooling of liquid material upon shut off of the dispenser, especially during intermittent dispensing operations. The first embodiment includes a nozzle body and nozzle fitting which include liquid flow passageways and together form an air passageway which communicates with a discharge passageway upstream of the discharge end of the nozzle fitting. Exhaust air from the dispenser is directed into the air passageway such that excess liquid material is blown out of the discharge passageway and off of the discharge end of the nozzle fitting immediately upon shut off of the dispenser. A second embodiment incorporates this anti-drip and anti-drool feature directly into the valve and valve stem of the dispenser by providing the air passageway through the valve and valve stem.

REFERENCES:
patent: 3315899 (1967-04-01), Quarve
patent: 3841567 (1974-10-01), Drozek et al.
patent: 3905552 (1975-09-01), Hall et al.
patent: 4408562 (1983-10-01), DeCamp et al.
patent: 4721252 (1988-01-01), Colton
patent: 4768718 (1988-09-01), Faulkner, III
patent: 4891249 (1990-01-01), McIntyre
patent: 4928883 (1990-05-01), Weinstein
patent: 4970985 (1990-11-01), Slautterback
patent: 5048454 (1991-09-01), Berntsson
patent: 5207352 (1993-05-01), Porter et al.
patent: 5226565 (1993-07-01), Hladis et al.

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