Piston-pumping system having o-ring seal properties

Details Piston-pumping system having o-ring seal properties Piston-pumping system having o-ring seal properties

2007-10-23

2007-10-23

Sirmons, Kevin C. (Department: 3767)

Expansible chamber devices

With guide or seal on cylinder end portion for piston or...

Non-metallic seal means between piston or member and end...

C417S416000, C604S151000, C604S152000

Reexamination Certificate

active

10727286

ABSTRACT:
The present invention relates to a piston pumping system for substantially gas-free measurement and/or pumping of predetermined quantities of liquids, preferably pharmaceutical liquids containing oxidation-prone ingredients. Preferably, the system is used as a micropump or as a component thereof in medical devices such as transdermal therapeutic systems, for example.

REFERENCES:
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patent: 4813932 (1989-03-01), Hobbs
patent: 4961726 (1990-10-01), Richter
patent: 6132755 (2000-10-01), Eicher et al.
patent: 6389955 (2002-05-01), Schaefer
patent: 6409175 (2002-06-01), Evans et al.
patent: 6547756 (2003-04-01), Greter et al.
patent: 6916159 (2005-07-01), Rush et al.
patent: 19921951 (1999-11-01), None
patent: 0361260 (1990-04-01), None

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