Quotables
"Fooling around with alternating current is just a waste of time. Nobody will use it, ever."
Thomas Edison ; 1889
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7108059 | Downhole pump The present invention is directed to a downhole pump assembly having a housing, a standing valve located near the lower end of the housing, a plunger disposed in the chamber of the housing below the upper and lower internal shoulders thereof and adapted for reciproc... | 09/19/2006 |
| 7021373 | Downhole hydraulic ram A system and method for pumping water from a wellbore to a surface location using an improved motorless water pump. The improved motorless water pump is a downhole hydraulic ram pump powered by the renewable energy source, groundwater. As water falls down a wellbore... | 04/04/2006 |
| 5885061 | Pneumatic pump A pump for compression of air includes a first inner stationary cylinder (1) arranged a second displaceable cylinder (2). A piston (3) arranged for reciprocating motion together with the first cylinder (1) divides the interior space of the first cylinder ... | 03/23/1999 |
| 5720600 | Sucker rod pump A sucker rod pump comprises a cylindrical housing (1) having a suction valve (3), a hollow plunger (2) with a discharge valve (18) capable of reciprocating along the cylindrical housing (1) and at least two stationary sealing devices (7) spaced from each ... | 02/24/1998 |
| 5358389 | Two-stage compression vacuum pump having valved piston and power limiting valve This invention relates to a vacuum pump. The pump includes a pump housing (10) having upper and lower cylindrical, partly liquid filled, compression chambers (11 and 12 respectively) which are separated from each other and in which an upper and a lower pa... | 10/25/1994 |
| 4393928 | Apparatus for use in rejuvenating oil wells A sub incorporating a check valve is connected into the lower end of a well pipestring. This valve will pass hot steam injected down the pipestring to the formations to loosen up the thick crude oil. The check valve prevents back flow and thus will hold t... | 07/19/1983 |
| 4219311 | Pump assembly A rod-drawn pump for use in a well includes a tubing and a rod reciprocating within the tubing to move a plunger in a series of alternating upward strokes and downward strokes. The plunger defines a pump chamber with a standing valve through which liquid ... | 08/26/1980 |
| 4026661 | Hydraulically operated sucker rod pumping system The method and apparatus for producing an oil well, by the provision of a pumpjack unit which reciprocates an engine assembly located within the upper extremity of a wellbore. The engine assembly has a power piston which hydraulically drives a lift piston... | 05/31/1977 |
