Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Reexamination Certificate
2004-08-13
2008-10-07
Hepperle, Stephen M (Department: 3753)
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
C137S907000, C220S714000, C239S033000
Reexamination Certificate
active
07431047
ABSTRACT:
The present invention regards an underpressure-activated valve mechanism for controlled dispensing of fluids, including liquid food articles, from a receptacle. When the user applies sufficient suction force (P2) across a pressure comparative diaphragm zone a valve opening force is applied to a valve area that has a force connection with the diaphragm zone. When the suction force ceases the valve area closes and remains closed, even in the event of overpressure (P3) in the receptacle.
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patent: 2003/0029503 (2003-02-01), Williamson et al.
patent: 2003/0071136 (2003-04-01), Ference
patent: 315511 (2003-06-01), None
International Search Report mailed Dec. 22, 2004.
Written Opinion of ISA mailed Dec. 22, 2004.
Applicant's Reply and Amended Claims dated Jun. 17, 2005.
Andrus Sceales Starke & Sawall LLP
Hepperle Stephen M
SmartSeal AS
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