Dispensing – With discharge assistant – With movable nozzle interconnected therewith
Reexamination Certificate
2006-06-27
2006-06-27
Mar, Michael (Department: 3754)
Dispensing
With discharge assistant
With movable nozzle interconnected therewith
C222S321900, C222S385000
Reexamination Certificate
active
07066359
ABSTRACT:
A dispenser for flowable media is provided, which operates in user-independent manner with respect to the pressure buildup and dosage quantity. On pressing on an operating head (35) a piston rod (29) is forced into a pump cylinder. As the pump chamber (52) is sealed by means of a delivery valve (51), which operates in path-dependent manner as a slide valve, under the action of a spring (42) pressing on the piston collar (43), a pressure builds up in the pump chamber (52), which is released following a predetermined length of travel on opening the delivery valve. A relatively constant pressure can be obtained over the entire discharge phase through the pretension of spring (42).
REFERENCES:
patent: 5358149 (1994-10-01), O'Neill
patent: 5785208 (1998-07-01), Dobbs et al.
patent: 5803318 (1998-09-01), Lina
patent: 6056163 (2000-05-01), Lai
patent: 6145710 (2000-11-01), Carter
patent: 2002/0008122 (2002-01-01), Ritsche et al.
patent: 0 853 500 (2000-04-01), None
Buechner Patrick
Hochberg D. Peter
Ing. Erich Pfeiffer GmbH
Mar Michael
Mellino Sean
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