Class 417/386 - Working member position responsive

Subclass of Class 417 - Pumps
Definition: Apparatus in which the means for supplying or exhausting
No. of patents: 40
Last issue date: 02/02/2010

Number	Title	Issue Date
7654801	Hydraulically-actuated diaphragm pump with a leak compensation device A diaphragm pump including, in a pump body, a hydraulic control chamber disposed between a piston for executing reciprocating motion and the diaphragm, the pump including elements for compensating leaks from the hydraulic chamber, the elements including a refilling ...	02/02/2010
7425120	Diaphragm position control for hydraulically driven pumps A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a spool member. The transfer chamber is defined between the diaphragm and piston and is filled with a hydraulic fluid. The fluid reservoir is in fluid communicatio...	09/16/2008
7201097	Diaphragm pump The invention relates to a diaphragm pump for pumping aggressive and/or abrasive media, such as slurries, comprising a diaphragm housing mounted in a substantially vertically disposed pipe system, which substantially vertically disposed pipe system comprises at leas...	04/10/2007
7090474	Diaphragm pump with overfill limiter A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber. An overfill preventive element in the form of a mechanical stop, a fully closed coil spring, or a valve system, or alternatives are provided. ...	08/15/2006
6948918	Membrane pump with stretchable pump membrane The invention relates to membrane pumps for delivering liquids. More specifically, a pump is provided having a pump housing with a pump cavity formed between first and second wall portions thereof, and an pump membrane pump membrane having first and second membrane ...	09/27/2005
6899530	Diaphragm pump with a transfer chamber vent with a longitudinal notch on the piston cylinder A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber and the inability to self-prime. A notch is provided in the upper portion of the surface of the cylinder so that air can be forced back to the reservoir. In...	05/31/2005
6886720	Metering device A metering device that includes a housing defining a cylindrical chamber containing a reciprocating shuttle. The two opposed end parts of the chamber are interconnected by fluid flow ducts to a cylindrical valve bore. Contained with the valve is a rotary valve rod d...	05/03/2005
6736611	Aircraft fluid delivery device An aircraft fluid delivery device (10) including a piston assembly (20), a pilot assembly (22), and a control assembly (24). The control assembly (24) includes non-contact proximity sensors (S1, S2) that sense the pos...	05/18/2004
6726458	High pressure pump with filler plug A high-pressure pump for pumping fuel, and includes a main unit for pumping the fuel, which unit is actuated by a secondary unit for pumping a working liquid. The secondary unit has a filling neck for filling a reservoir with working liquid. The filling neck is conn...	04/27/2004
6672841	Pumping and metering device The present invention relates to a pumping device for delivering and metering fluids, in particular medical fluids such as dialysis fluids, with a piston unit having a driving device and a piston and with a membrane unit which has a membrane and a first c...	01/06/2004
6422834	Reversing valve for a diaphragm pump A valve arrangement including a valve housing (10) which includes an inlet port (11) and two outlet ports (12, 13) for fluid flowing through the housing. A valve element (15) is accommodated in a first valve space in the valve housing and movable between ...	07/23/2002
6419463	Reversing valve for a diaphragm pump A valve housing (10) includes an inlet port (11) and two outlet ports (12, 13) for fluid passing through the housing. A valve element (15) accommodated in the valve housing is moveable freely between two end positions and has two surfaces (16) each adapte...	07/16/2002
6386841	Pneumatically operated hydraulic pump A pneumatically operated hydraulic pump includes a cylinder housing accommodating a main piston to subdivide the housing interior in two working chambers. The main piston is connected to a hydraulic piston for joint reciprocation so that the hydraulic pis...	05/14/2002
6276907	Hydraulically driven diaphragm pump A diaphragm pump for pumping a fluid, such as paint, includes a diaphragm separating a first chamber for accommodating and dispensing the paint from a second chamber for accommodating a drive fluid, and a piston that reciprocates to drive the drive fluid ...	08/21/2001
6264437	High pressure pump for all liquids A device enables the pumping of any kind of liquid while giving the liquid very high delivery pressure. The units that cause pumped liquid suction and then its delivery are driven exclusively by hydraulic means excluding mechanical means. So that there is...	07/24/2001
6071089	Hydraulic diaphragm pump A high pressure hydraulic diaphragm pump having a pressure chamber on one side of a diaphragm and a fluid delivery chamber on the other side of the diaphragm with a reciprocating piston assembly including a piston member being provided for pressurizing th...	06/06/2000
6004105	Diaphragm pump with adjustable stroke length A fluid powered diaphragm pump with an adjustable stroke is provided. The stroke of the pump is adjusted by providing an inner diaphragm plate assembly that includes a retractable piston. The piston is biased towards the inner plate by one or more standof...	12/21/1999
5707219	Diaphragm pump A diaphragm pump is provided having a plurality of piston inlets connecting a hydraulic fluid source with the piston chamber and a plurality of check valves each having a ball and valve seat disposed within the inlets. The valve seat includes a conical se...	01/13/1998
5655893	Bellows pump A bellows pump exhibiting stable and highly efficient performance. The bellows pump is composed of a first work chamber for admitting fluid, a second work chamber for storing work fluid, a bellows for parting a chamber space into the first and the second ...	08/12/1997
5624246	Hydraulic ammonia solution pump The present invention relates to a hydraulic pump for use in an ammonia absorption heating and cooling system. The pump is driven by an electric motor that causes a piston to reciprocate within a cylinder. The piston is hydraulically actuated and allows t...	04/29/1997
5584664	Hydraulic gas compressor and method for use A gas compressor with at least three hydraulic cylinders is connected to a source of natural gas by a gas line. The gas line can also be removably attached to a storage tank. A hydraulic system is also connected to the cylinders. The compressor additional...	12/17/1996
5547351	Low pressure low volume liquid pump A diaphragm pump which provides a low internal volume and minimizes volume contributions for applications which require the transfer of fluid volumes on the order of one to several microliters. The pump includes a plunger which reciprocates within a bore ...	08/20/1996
5332372	Modular double-diaphragm pump The fluid-operated, double diaphragm pump of the invention includes a central housing block having opposed side faces, and a pair of diaphragm housing end sections secured to opposite sides of the central housing block. The diaphragm housings define a pai...	07/26/1994
5281107	Control system for piston membrane pump A control system for a piston membrane pump having a pressure chamber is mounted on one side of the membrane, into which chamber a controllable loading and unloading device communicates, computing means connected to the loading and unloading device. Calcu...	01/25/1994
5249932	Apparatus for controlling diaphragm extension in a diaphragm metering pump A diaphragm metering pump having control over diaphragm extension is described. A position sensor is incorporated in a diaphragm metering pump to indicate the relative position of the diaphragm during flexure. When excessive extension of the diaphragm is ...	10/05/1993
5088901	Membrane pump with a freely oscillating metal membrane The piston membrane pump has a feed chamber for the fluid to be pumped and a piston working chamber, a membrane hermetically separating the feed chamber and the piston working chamber and a piston oscillating back and forth in the piston working chamber. ...	02/18/1992
5032064	Pump for pressure exceeding one thousand atmospheres A pump has in a housing a revolvable shaft which drives a piston stroke guide body. Drive pistons are provided with piston shoes which run on the guide face of the piston stroke guide body and drive fluid supply pistons of smaller diameter. The pump prefe...	07/16/1991
4966528	Apparatus for controlling the hydraulic circuit of a piston diaphragm pump An apparatus for controlling the hydraulic circuit of a piston diaphragm pump, having at least a pump diaphragm alternatingly subjected to the presure or the suction stroke of a piston operatingly connected to driving means, the apparatus comprising contr...	10/30/1990
4730990	Pulse combustion engine and heat transfer system A pulse combustion powered apparatus is disclosed for temperature conditioning and pressurizing fluids. The alternating periods of positive and negative pressure of the combustion gases of a pulse combustion burner drive a reciprocating compressor and the...	03/15/1988
4685510	Pulse combustion engine and heat transfer system A pulse combustion powered apparatus is disclosed for temperature conditioning and pressurizing fluids. The alternating periods of positive and negative pressure of the combustion gases of a pulse combustion burner drive a reciprocating compressor and the...	08/11/1987
4573885	Piston diaphragm pump In a piston diaphragm pump, comprising housing portions clamped together by clamping bolts, a diaphragm, sealingly clamped between adjacent housing portions for separating a feeding chamber from a working chamber, and a reciprocating piston acting in said...	03/04/1986
4492534	Fuel injection pump for internal combustion engine Fuel injection pump of the type arranged to inject fuel into engine cylinders with the fuel flow being controlled by an electromagnetic valve, comprises a rotor arranged to rotate in timed relation to engine rotation, and a shuttle movably received in an ...	01/08/1985
4465438	Piston diaphragm pump A piston diaphragm pump includes a support plate, disposed on the side of the piston work chamber, for the diaphragm, which is held in a freely movable manner counter to the pressure of a plurality of springs engaging its circumference. A control push rod...	08/14/1984
4450813	Distribution type fuel injection pump A distribution type fuel injection pump for distributing and pumping a fuel into a plurality of cylinders of an internal combustion engine. The fuel injection pump is constructed of a hydraulic head formed with first and second fuel feed ports, a rotor fi...	05/29/1984
4436492	Surface power unit for a downhole pump A surface power unit for use on a subterranean well generates a series of pulses of pressurized fluid to a downhole pump. A pump means generates a flow of fluid from a reservoir through a charging line to a charging side of a cylinder. A piston is slidabl...	03/13/1984
4416599	Diaphragm pump with compensation means in the hydraulic control chamber The present invention relates to a hydraulically controlled diaphragm pump, comprising an intermediate chamber filled with fluid, and a re-filling conduit for said chamber. According to the invention, means are provided for controlling the closing and the...	11/22/1983
4199535	Diaphragm pump A diaphragm pump operated by vacuum pressure and having a switching arrangement to control the continuous alternations between the intake stroke caused by vacuum pressure and the working stroke caused during venting by a spring after the end of each strok...	04/22/1980
4050859	Diaphragm pump having a reed valve barrier to hydraulic shock in the pressurizing fluid Apparatus for an improved diaphragm pump wherein hydraulic shock and mechanical wear to the diaphragm membrane is reduced by providing a circular reed valve member adjacent to the diaphragm. The reed valve member provides a barrier to pressurized hydrauli...	09/27/1977
4025124	Regulatable pump device A piston pump with a controllable stroke is described. It is a positive displacement type pump with several stages and also a continuous variable stroke. The pump piston is only effectively connected with the drive during the working stroke. For example, ...	05/24/1977
4019837	Pressure unloading apparatus for a diaphragm pump Apparatus is disclosed for unloading excess pressures developed in a hydraulic diaphragm pump, wherein the pressure of the pumped fluid is sensed by a control diaphragm connected to an unloading valve which is placed in a passage connecting the hydraulic ...	04/26/1977

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Class 417/386 - Working member position responsive