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Class Information
Number: 417/503
Name: Pumps > Expansible chamber type > Multiple cyclic inlet paths
Description: Apparatus comprising a single pump chamber having a plurality of inlet passages for pump fluid, each of said inlet passages being individually, cyclically controlled and either (1) supplied from different sources or (2) if supplied from a common source, the control means having different modes of operation or operating at different times in the pump cycle.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6676387 |
Metering pump with a rotary valve responsive to electrical signals from the contact between a fluid responsive shuttle and dual probes |
Jan. 13, 2004 |
| 6622612 |
Pump, particularly plunger pump |
Sep. 23, 2003 |
| 6318977 |
Reciprocating compressor with auxiliary port |
Nov. 20, 2001 |
| 6318644 |
Fluid transfer pump wash-out apparatus and method |
Nov. 20, 2001 |
| 6116870 |
High pressure pump with solenoid operated valve |
Sep. 12, 2000 |
| 6116869 |
Pumping process and system for mixing liquids |
Sep. 12, 2000 |
| 5984651 |
Hydraulic brake system |
Nov. 16, 1999 |
| 5915927 |
Reciprocating pump for generating fluid pressure |
Jun. 29, 1999 |
| 5894609 |
Safety system for multiple drain pools |
Apr. 20, 1999 |
| 5741710 |
Reaction chamber and a method for generating a gaseous sample based on the use thereof |
Apr. 21, 1998 |
| 5718570 |
Rotary control valve for a piston pump |
Feb. 17, 1998 |
| 5707221 |
Method of plural zone pumping utilizing controlled individual pump inlet in each zone |
Jan. 13, 1998 |
| 5653876 |
High pressure pump for fine liquid metering |
Aug. 5, 1997 |
| 5531078 |
Low volume inlet reciprocating compressor for dual evaporator refrigeration system |
Jul. 2, 1996 |
| 5374168 |
Reciprocating piston fluid pump |
Dec. 20, 1994 |
| 5338166 |
Evacuation pump system for both rigid and flexible containers |
Aug. 16, 1994 |
| 5335734 |
Reciprocating additive mixing pump apparatus and method |
Aug. 9, 1994 |
| 5299917 |
Evacuation pump system with check valves for both rigid and flexible containers |
Apr. 5, 1994 |
| 5219455 |
Pump for ice-cream machines |
Jun. 15, 1993 |
| 5158675 |
Gradient system |
Oct. 27, 1992 |
| 5062774 |
Solution pumping system including disposable pump cassette |
Nov. 5, 1991 |
| 5017105 |
Metering pump |
May. 21, 1991 |
| 5009577 |
Rotary compressor of variable displacement type |
Apr. 23, 1991 |
| 4975028 |
Pump apparatus for evacuating containers |
Dec. 4, 1990 |
| 4915602 |
Pump for pumping a fluid comprising a liquified gas |
Apr. 10, 1990 |
| 4824342 |
Chemical injector system for piston pumps |
Apr. 25, 1989 |
| 4723895 |
Method of and apparatus for effecting volume control of compressor |
Feb. 9, 1988 |
| 4673296 |
Mixing pump for transport and effective mixing (homogenization) of two or more liquids (gases) with a constant, but adjustable, ratio of the liquids |
Jun. 16, 1987 |
| 4577606 |
Pressure valve assembly for fuel injection pumps |
Mar. 25, 1986 |
| 4573932 |
Electrical fluid pumping device including first and second pumping portions |
Mar. 4, 1986 |
| 4552515 |
Handy tube pump |
Nov. 12, 1985 |
| 4523903 |
Dosing pump |
Jun. 18, 1985 |
| 4515537 |
Dosing pump |
May. 7, 1985 |
| 4512727 |
Fuel injection pump of the rotary distributor type |
Apr. 23, 1985 |
| 4502834 |
Apparatus and method of throttling centrifugal pump liquid output |
Mar. 5, 1985 |
| 4491150 |
Outdoor water holding and pumping system |
Jan. 1, 1985 |
| 4416596 |
Fluid-transfer system and method |
Nov. 22, 1983 |
| 4412428 |
Apparatus for producing and dispensing an aerated frozen confection |
Nov. 1, 1983 |
| 4407641 |
Electrically-driven rotary vane pump |
Oct. 4, 1983 |
| 4349321 |
Liquid dispensing systems |
Sep. 14, 1982 |
| 4336000 |
Liquid dosage piston pump |
Jun. 22, 1982 |
| 4262849 |
High pressure washer for mine equipment |
Apr. 21, 1981 |
| 4263602 |
Constant flow rate liquid supply pump |
Apr. 21, 1981 |
| 4256440 |
Liquid dosing apparatus |
Mar. 17, 1981 |
| 4199306 |
Method and apparatus for compressing gas |
Apr. 22, 1980 |
| 4147478 |
Secondary pump feed apparatus |
Apr. 3, 1979 |
| 4136708 |
Hemodialysate blending system |
Jan. 30, 1979 |
| 4113410 |
Liquid-sealed type vacuum pump |
Sep. 12, 1978 |
| 4065237 |
Valve apparatus for expansible chamber |
Dec. 27, 1977 |
| 4018545 |
Mix blending pump |
Apr. 19, 1977 |
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