Title:
POSITIVE DISPLACEMENT PUMP HAVING PISTON AND/OR LINER WITH VAPOR DEPOSITED POLYMER SURFACE
Document Type and Number:
WIPO Patent Application WO2004106733
Kind Code:
A3
Abstract:
A metering pump for providing relatively, small, precise volumes of fluid is provided. The pump piston and/or the interior of the cylinder has a surface finish exhibiting a roughness average within selected limits and a vapor deposited polymer such as polytetrafluoroethylene. A drive mechanism is provided for simultaneously rotating and reciprocating the piston within a cylindrical chamber. Fluid is thereby drawn into the chamber and expelled.
Inventors:
PINKERTON HARRY E III (US)
HOLLAND CARLOS G (US)
HOLLAND CARLOS G (US)
Application Number:
PCT/US2004/015442
Publication Date:
May 12, 2005
Filing Date:
May 18, 2004
Export Citation:
Assignee:
ROPINTASSCO 2 LLC (US)
PINKERTON HARRY E III (US)
HOLLAND CARLOS G (US)
PINKERTON HARRY E III (US)
HOLLAND CARLOS G (US)
International Classes:
F04B7/06; F04B53/00; F04B53/14; F04B53/16; (IPC1-7): F04B19/02
Foreign References:
| US3168872A | 1965-02-09 | |||
| US4501192A | 1985-02-26 | |||
| US6279454B1 | 2001-08-28 | |||
| US4979073A | 1990-12-18 | |||
| US4197787A | 1980-04-15 |
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