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Class Information
Number: 417/528
Name: Pumps > Expansible chamber type > Plural pumping chambers > Including valved piston > Fluid conduit for one chamber extends through portion of another
Description: Apparatus in which the chambers are positioned in axial alignment and a conduit for conducting fluid to or from a first pumping chamber extends axially through a portion of a second pumping chamber.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6716006 |
Telescopic dual movement pump |
Apr. 6, 2004 |
| 6676390 |
Manual air pump incorporating a foot switch in the base member |
Jan. 13, 2004 |
| 6589027 |
Double acting reciprocating motor with uni-directional fluid flow |
Jul. 8, 2003 |
| 6428290 |
Air pump |
Aug. 6, 2002 |
| 6371741 |
Manual air pump having at least two selectable inflation modes |
Apr. 16, 2002 |
| 6318969 |
Floor air pump |
Nov. 20, 2001 |
| 6053709 |
Pump for moving viscous fluid materials |
Apr. 25, 2000 |
| 6027319 |
Compact manual air pump having selectable high volume and high pressure modes |
Feb. 22, 2000 |
| 5997256 |
Dual stage, dual mode air pump |
Dec. 7, 1999 |
| 5651666 |
Deep-well fluid-extraction pump |
Jul. 29, 1997 |
| 5102052 |
Fluid spray device |
Apr. 7, 1992 |
| 5055008 |
Proportionating pump for liquid additive metering |
Oct. 8, 1991 |
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