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Your search returned 88 patents.
( 417/404 in Current US Classification ) |
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| 1 |
| Patent ID | Title | Date Filed |
| 5110267 | Positive-displacement pump for pumping alimentary liquids
| December 6, 1989 |
| 5104296 | Engine end for a downhole hydraulically actuated pump assembly
| September 4, 1990 |
| 5064355 | Multiple engine deep well pump
| March 29, 1990 |
| 5064350 | Pump station
| April 16, 1990 |
| 5055008 | Proportionating pump for liquid additive metering
| January 29, 1990 |
| 5007812 | Hydraulic pump with pulsating high and low pressure outputs
| September 5, 1989 |
| 4871302 | Apparatus for removing fluid from the ground and method for same
| January 26, 1988 |
| 4836198 | Portable ventilating device
| July 27, 1987 |
| 4834618 | Oil feeding systems
| November 23, 1987 |
| 4811558 | System and method for providing compressed gas
| October 13, 1981 |
| 4792291 | Viscous damped valve for hydraulic pump
| September 9, 1987 |
| 4780064 | Pump assembly and its method of operation
| February 10, 1986 |
| 4768589 | Downhole hydraulic actuated pump
| February 2, 1987 |
| 4750941 | Liquid metering, mixing, dispensing, testing and purging method and apparatus
| January 14, 1986 |
| 4664186 | Downhold hydraulic actuated pump
| March 18, 1985 |
| 4659344 | Liquid motor and pump with a stroke regulating gas motor
| July 14, 1983 |
| 4597722 | Long-stroke downhole pump
| March 22, 1985 |
| 4588424 | Fluid pumping system
| October 16, 1984 |
| 4583500 | Marine propulsion system with automatic oil-fuel mixing
| January 25, 1985 |
| 4541783 | Long stroke, double acting pump having tension guide member
| June 30, 1983 |
| 4504197 | Pumping unit and reversing valve and method of operating
| December 3, 1981 |
| 4492537 | Fluid-operated oil or water well pump
| December 10, 1982 |
| 4476923 | Flexible tubing production system for well installation
| March 18, 1982 |
| 4437484 | Utility water system with a pressureless storage container, particularly for solar installations
| March 16, 1982 |
| 4431433 | Single stage liquid motor and pump
| September 14, 1982 |
| 4406598 | Long stroke, double acting pump
| October 14, 1980 |
| 4403919 | Apparatus and method for pumping a liquid from a well
| September 30, 1981 |
| 4402652 | Liquid motor and pump with a stroke regulating gas motor
| June 25, 1981 |
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