Patents in subclass Pumps/By Application Of Separate Fluid
Parent class: Pumps
| Number | Patent title | Issue Date |
|---|---|---|
| 06533560 | Electromagnetic oscillating type pump and method for manufacturing the same An electromagnetic oscillating type pump for oscillating diaphragms (5) connected to an oscillator (4) caused to oscillate by utilizing magnetic interaction between an electromagnetic portion (2) and a magnetic body (3), and having a... |
03/18/2003 |
| 5934372 | Pump system and method for pumping well fluids The invention provides apparatus for producing well fluids from an oil bearing formation penetrated by a well. The apparatus includes a tubing string forming a production flow path for production fluids between the earth's surface and a... |
08/10/1999 |
| 5765639 | Tubing pump system for pumping well fluids The invention provides apparatus for producing well fluids from an oil bearing formation penetrated by a well including a tubing string forming a production flow path for production fluids between the earth's surface and a location in the... |
06/16/1998 |
| 5701797 | Sealing system A piston reciprocally movable within a cylinder is sealed to the cylinder wall by fluid at a pressure greater than those of the fluids on the opposed sides of the piston supplied to the space (18) between two seals (19, 20) operative... |
12/30/1997 |
| 5624241 | Flexible hydraulic pump and agitator apparatus An improved towed apparatus for pumping and/or agitating manure slurries is disclosed. The apparatus, which is configured for energization by a tractor's hydraulics and power take-off system, includes an elongate conduit beam member... |
04/29/1997 |