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| Number | Title | Issue Date |
| H2219 | Method for coating small particles The coating method includes the steps of dissolving coating precursor(s) in a solvent to form a precursor solution: adding with mixing a miscible diluent to the precursor solution to form a coating solution; admixing solid particles to the coating solution to form a... | 07/01/2008 |
| 7226278 | Shape memory alloy wire driven positive displacement micropump with pulsatile output Apparatuses and methods for pumping fluid are disclosed. An exemplary apparatus is a miniature pump that includes a shape memory wire that obtains a plastic condition below a transformation temperature and has a memorized shape such that the shape memory wire produc... | 06/05/2007 |
| 7175395 | Pressure enhancer value system A system to intensify pressure supplied by a conventional pump where a piston assembly having two piston members at opposite ends is positioned in a pressure cylinder. The laterally outer subchambers are defined by the piston members and the cylinder and are adapted... | 02/13/2007 |
| 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 |
| 6863157 | Lubricant injector assembly A lubricant injector having a measuring chamber, venting of the injector involving transmission of lubricant from its inlet to the measuring chamber, a method of operation of the injector involving such transmission, systems embodying one or more of such injectors, ... | 03/08/2005 |
| 6705432 | Lubricant injection A lubricant injector having a measuring chamber, venting of the injector involving transmission of lubricant from its inlet to the measuring chamber, a method of operation of the injector involving such transmission, systems embodying one or more of such injectors, ... | 03/16/2004 |
| 6447259 | Pressure energy recovery device An energy recovery device includes at least one cylinder, a piston slidable in the cylinder, a first valve for selectively connecting one end of the cylinder to waste liquid at a first relatively high pressure and to drain and a second valve for allowing ... | 09/10/2002 |
| 6443709 | Oscillating spring valve fluid pumping system An oscillating spring valve fluid pumping system for use in a flowing stream of fluid comprises a spring valve, check valve and a housing with inlet and two outlets, one outlet for each valve. As fluid enters the system, it is directed to a spring valve w... | 09/03/2002 |
| 6234764 | Hydraulic ram pump The invention relates to a hydraulic ram pump, comprising: a propulsion water line fed with propulsion water, a delivery line which can be connected to delivery water via a bottom valve, a ram pump valve which is connected to the propulsion water line and... | 05/22/2001 |
| 6142746 | Pulsating valve for hydraulic rams having a liquid vessel attached thereto A pump device is disclosed, comprising a supply tube 1, for a liquid with a relatively low head, an accumulator 3 connected to supply tube 1 via a one-way valve 2, an outlet tube 4 from the accumulator for liquid with a relatively high head, and an outlet... | 11/07/2000 |
| 5310322 | Hydraulic ram pumps Hydraulic ram pump apparatus is provided, of the type including a body member (7) having a water flow passage therethrough, a waste gate (1) disposed in the passage, a delivery outlet (23) and a one-way delivery valve (10, 11) disposed in the outlet. The ... | 05/10/1994 |
| 5271721 | Hydraulic ram pumps Hydraulic ram pump apparatus is provided, of the type including a body member (7) having a water flow passage therethrough, a waste gate (1) disposed in the passage, a delivery outlet (23) and a one-way delivery valve (10, 11) disposed in the outlet. The ... | 12/21/1993 |
| 5102303 | Hydraulic ram A hydraulic ram includes a water inlet conduit, a draining conduit with a main clapper valve and a bell or cup valve. The bell or cup valve communicates with the chamber through a plurality of individual clapper arranged parallel to one another. Each of t... | 04/07/1992 |
| 5086645 | Multiple caliper arms capable of independent movement A multiple arm caliper system for operation of a multiple arm caliper tool is set forth. It incorporates an elongate tool body having a motor means therein. The motor means operates a coupling rod connected to a resilient spring loading a piston within a ... | 02/11/1992 |
| 4930993 | Energy regenerative apparatus for a water hammer type pump An energy regenerative apparatus for a water hammer type pump includes a water hammer type pump and an engergy regenerative apparatus. The water hammer type pump includes a reservoir which is connected to a pump body by a pipe. A pressure tank is fixed on... | 06/05/1990 |
| 4911613 | Hydraulic ram-type water pump A motorless water pump for utilizing the rate of flow of falling water to pump the same to a higher location. The pump utilizes a phenomenon known as "water hammer" to use the force of the running water to close a valve and pump the water to a higher loca... | 03/27/1990 |
| 4864914 | Blowout preventer booster and method A hydraulic control circuit and method of operating a blowout preventer having a two-way hydraulic piston and cylinder assembly including an open and close port. An adjustable hydraulic supply is connected to a control valve which is in turn connected to ... | 09/12/1989 |
| 4690618 | Booster type high-pressure vessel In a booster type high-pressure container including an outer cylinder associated with upper and lower lids and an inner cylinder fitted in the outer cylinder with a gap clearance retained therebetween, a booster chamber is provided between a piston dispos... | 09/01/1987 |
| 4537563 | Ram pumps An improved ram pump of the type having a pump housing (7) an inlet (8) for intake of fluid, a reservoir (10) for supply of a dynamic fluid head to the pump, a release valve mechanism (11) for exhaust of fluid from the pump and a lift valve mechanism (12)... | 08/27/1985 |
| 4073604 | Construction for a water hammer type pump A high efficiency water hammer type pump and more particularly, an improved construction for such a pump including a construction whereby water expelled from a waste valve is returned to the supply line of the pump.... | 02/14/1978 |
| 4054399 | Hydraulic ram valve unit A ram valve is connected in the supply line through which water flows at a high mass flow rate. A branch line branches off upstream of the valve and includes a check valve and a pressure vessel upstream of the check valve. The ram valve is constructed to ... | 10/18/1977 |
