Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Reexamination Certificate
2004-02-03
2009-10-06
Shaver, Kevin P (Department: 3754)
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
C222S321300
Reexamination Certificate
active
07597218
ABSTRACT:
A dispensing device comprising pump for dispensing liquid, the pump comprising a hollow piston moveable within a cylinder, and a valve, controlling the supply of liquid to the piston/cylinder. During a first phase of operation the piston moves outwardly within the cylinder while the valve permits the supply of liquid into the chamber and during a second, subsequent, phase of operation the piston moves inwardly within the cylinder while the valve shuts off the supply of flowable material, with the result that liquid drawn into the chamber during the first phase is pressurized. Arrangements for effective priming and pre-compression of liquid are also described.
REFERENCES:
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patent: 5192006 (1993-03-01), Van Brocklin et al.
patent: 5228600 (1993-07-01), Steijns et al.
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patent: 6065647 (2000-05-01), Bliss et al.
patent: 2513 766 (1975-10-01), None
patent: 0795 354 (1997-09-01), None
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International Search Report and Written Opinion dated Jul. 1, 2004.
Jenkins Wilson Taylor & Hunt, P.A.
Shaver Kevin P
Wood Jonathan
Wordon GmbH
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