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| Number | Title | Issue Date |
| 7665974 | Diaphragm pump position control with offset valve axis A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a valve spool. The transfer chamber is defined between the diaphragm and piston and is filled with a hydraulic fluid. The fluid reservoir is in fluid communication... | 02/23/2010 |
| 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 |
| 7381035 | Piston pump with check shaft A pump for use with a dispensing unit of a liquid hot melt adhesive system, dispensing units including the pump, and a method of operating a pump for pumping a liquid like liquid hot melt adhesive. The pump has a piston movable within a pumping chamber for transferr... | 06/03/2008 |
| 7367785 | Reduced icing valves and gas-driven motor and reciprocating pump incorporating same A valve for a gas-driven motor and a valve assembly and reciprocating pump incorporating the valve are provided. The valve includes a shiftable valve for alternatively supplying a motive gas through first and second supply ports to opposed first and second power pis... | 05/06/2008 |
| 7354190 | Two-stage mixing system, apparatus, and method A two-stage mixing system, apparatus, and method produces a solution including a first substance and a second substance in a predetermined ratio by first mixing the first substance with a first liquid to produce a first solution and then mixing the first solution wi... | 04/08/2008 |
| 7257940 | Device and method for pumping a fluid A method of pumping a fluid includes: providing a pressurizer for pressurizing the fluid, the pressurizer including at least two storage tanks, where, for each storage tank, the pressurizer includes a propellant entrance valve, a propellant exit valve, a pressurant ... | 08/21/2007 |
| 7194853 | Pressurizer for a rocket engine A pump for pressurizing a fluid includes an engine portion including a first pressure vessel, a first piston movable inside the first pressure vessel, at least two pressurant entrance valves connected to the first pressure vessel, and at least two pressurant exit va... | 03/27/2007 |
| 7134849 | Molded disposable pneumatic pump A mechanical pump having a unitary construction such that the fluid being pumped is prevented from leaking without requiring the use of discrete seal elements. The absence of discrete seal elements and integral coupling of various components of the pump substantiall... | 11/14/2006 |
| 7114929 | Reciprocating pump and check valve In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber for regulating the flow of operating fluid is located between the drive... | 10/03/2006 |
| 7007828 | Chemical metering pump A liquid chemical metering pump (24) is described that can be fully submerged within a hazardous liquid chemical transport/storage container (28). The pump (24) includes a discharge adaptor (30) that can be received in the outlet aperture... | 03/07/2006 |
| 7000455 | Leakage monitoring in the hydraulic pressure area of a membrane pump In a process for the monitoring of leakage in the hydraulic pressure area of a membrane pump, processing is in a manner such that the point in time (t3), at which the snifting process serving for leakage compensation is initiated, is monitored continuousl... | 02/21/2006 |
| 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 |
| 6926774 | Piezoelectric vaporizer An apparatus for controlling the flow of liquid material from a liquid material source to a process chamber is disclosed. The apparatus comprises an injector/vaporizer disposed proximate to the process chamber. The injector/vaporizer includes one or more piezoelectr... | 08/09/2005 |
| 6887047 | Pneumatic pinch mechanism for a deformable tube A pinch mechanism, which can be used as part of a pump, includes a deformable tube (10) enclosed within a body (11) which has a first chamber (11a). The deformable tube (10) defines a flow passage. A second chamber (19) is c... | 05/03/2005 |
| 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 |
| 6719008 | Offshore loading system by suspended piping The invention concerns an assembly for transferring fluid (13) between a first site and a second site, comprising: a winch (40) for the first site (10) whereon is wound a suspension cable (17) designed to be stretched between the two site... | 04/13/2004 |
| 6712587 | Hydraulic amplifier pump for use in ultrahigh pressure liquid chromatography A hydraulic amplifier system for an ultra-high pressure liquid chromatography system. The hydraulic amplifier system includes a hydraulic cylinder comprising a primary piston chamber in which a primary piston is disposed and a secondary piston chamber in which a sec... | 03/30/2004 |
| 6554582 | High pressure pump with improved hub A pump has a main unit (18) for pumping a transferred liquid which is actuated by an secondary unit (20) which pumps a working liquid. The secondary unit (20) has a hub (64) which is rotably mounted in a housing (16). The hub has a cylindrical guiding sur... | 04/29/2003 |
| 6343620 | Articulated device for transferring fluid and a loading crane including such a device The transfer device between a jib including at least one pipe section (54a, 54b) fixed to the jib (12) and a coupling, comprises a system of concertina or deformable diamond-shaped type articulated pipe segments and actuated by cable, at least one pipe se... | 02/05/2002 |
| 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 |
| 6234766 | Pump system A pump system suitable for pumping a hot medium, such as hot mixtures of liquid and solid substances (slurries), includes at least one displacement pump, such as a membrane pump, at least one bidirectional flow pipe, and a second pipe connected to the pum... | 05/22/2001 |
| 6109881 | Gas driven pump for the dispensing and filtering of process fluid A gas driven pump controls the process fluid pressure within a filtering and dispensing system. A pressure controller in the pump controls gas pressure within an enclosed chamber in the pump. The gas chamber is adjacent a floating piston that rests atop a... | 08/29/2000 |
| 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 |
| 5899671 | Hydraulic driven diaphragm pump with mechanical diaphragm stroke limitation For a hydraulically driven diaphragm pump with a diaphragm consisting of at least two individual layers, these layers are clamped at least in their central area between a coupling part on the feed area side and the hydraulics area side and are thus mechan... | 05/04/1999 |
| 5810567 | Hydraulic Diaphragm pump On a hydraulic diaphragm pump with a diaphragm including at least two individual layers, a dimensionally stable reinforcing element that moves together with the diaphragm and is kept in contact with the diaphragm is provided in the central area of the dia... | 09/22/1998 |
| 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 |
| 5655894 | Controlled prevention of premature snuffle valve actuation in high pressure membrane pumps A hydraulically driven membrane pump, particularly a high pressure membrane pump, having a membrane which is held on its edges by a clamp between a pump housing and a pump cover, which membrane separates a pumping space from a hydraulic compression space,... | 08/12/1997 |
| 5649813 | Chamber insulation for prevention of icing in air motors Insulation is provided in the form of wall insulation, piston or diaphragm insulation and/or piston rod and/or diaphragm washer insulation to increase the temperature in the working air chamber of an air motor of the piston or diaphragm type to reduce the... | 07/22/1997 |
| 5520523 | Diaphragm-type pump A diaphragm-type pump includes a disk-like diaphragm made of an elastic material which is held between an upper housing and a lower housing. In this diaphragm-type pump, the diaphragm, which has a flat shape before it is mounted in the pump, is bent along... | 05/28/1996 |
| 5331842 | Cyclical pressure testing apparatus A pressure testing apparatus including a twin cylinder accumulator assembly having a first cylinder and a first piston dividing the first cylinder into first and second chambers. The first chamber communicates with a test specimen and contains a first flu... | 07/26/1994 |
| 5310321 | Pump system A pump system includes a displacement pump whose oscillating fluid pressure variations are connected to drive a membrane pump. The membrane pump in turn oscillates fluid in a fluid-filled vertical pipe connected to a fluid-filled commuting pipe. The displ... | 05/10/1994 |
| 5299919 | Fuel injector system A high pressure fuel injector system including a high pressure fuel pump useable with a pressure booster, a pressure stabilizer with a high speed tandem actuated distributor and a fuel having a fuel injector with high pressure fuel admisstion passages and... | 04/05/1994 |
| 5246351 | Hydraulically driven diaphragm pump with diaphragm stroke limitation In a hydraulically driven diaphragm pump, which is provided with a diaphragm clamped on the edge which separates a delivery chamber from a hydraulic chamber, the hydraulic chamber being subdivided into a diaphragm work chamber and a piston work chamber co... | 09/21/1993 |
| 5186615 | Diaphragm pump A diaphragm pump includes upper and lower pump bodies clamping a diaphragm therebetween which separates a driving fluid chamber in the upper body from a pump chamber in the lower body, each body having gripping ridges surrounding the chamber; a driving fl... | 02/16/1993 |
| 5092745 | Automatic pressure-driven compressor A compressor (2) uses lower pressure compressed air from a compressed air supply (4, 6) to automatically create higher pressure compressed air. This compressor includes a pressure intensifier (8) having a piston assembly (16) sized for reciprocal movement... | 03/03/1992 |
| 4883412 | Variable capacity diaphragm pumps The invention relates to an improvement in variable capacity diaphragm pumps. According to the invention, the piston is driven by a cam fast with the wheel of a speed reducing gear pair, the eccentric/wheel assembly rotating idly on a fixzed shaft of whic... | 11/28/1989 |
| 4806079 | Apparatus for simultaneously pumping a plurality of liquids Apparatus for simultaneously pumping two or more different liquids to a spraying device has a pair of discrete diaphragm pumps for each liquid. The pumps of each pair are connected in parallel and operate alternatingly so that one pump delivers a metered ... | 02/21/1989 |
| 4773831 | Diaphragm plunger pump A diaphragm plunger pump comprises a housing, element forming a pump chamber associated with the housing, a plunger working chamber arranged to be filled with hydraulic fluid during operation, a sealingly clamped diaphragm separating the pump chamber from... | 09/27/1988 |
| 4734013 | Rotary pressure intensifier A pressure intensifier for a fluid comprises at least three piston assemblies disposed along mutually parallel axes equiangularly disposed with respect to a central axis of the intensifier and radially equidistant therefrom. Each piston assembly has two o... | 03/29/1988 |
| 4705461 | Two-component metering pump A proportioning pump with tandem diaphragm pumps each having a pumpage chamber connected with a source of supply and a mixer and dispensing nozzle, a piston pump for operating each of the diaphragm pumps, a common eccentric drive for the pistons of the pi... | 11/10/1987 |
