Class 417/347 - Single member controls motive fluid for each working member

Subclass of Class 417 - Pumps
Definition: Apparatus having control valve means comprising either (1)
No. of patents: 37
Last issue date: 06/26/2007

Number	Title	Issue Date
7235400	Laminated microarray interface device A device for forming a low volume reaction chamber on a substrate such as a microarray slide and its method of use is disclosed. The reaction chamber forming device has an adhesive laminate design that permits it to be manufactured as a disposable device. A preferre...	06/26/2007
7223363	Method and system for microfluidic interfacing to arrays A method and system for providing a fluidic interface to slides bearing microarrays of biomolecules or other samples immobilized thereon to perform a variety of chemical reactions or processing steps on the slide. An interface device seals against the slide to form ...	05/29/2007
7169229	Moving head, coating apparatus The invention pertains to a coating apparatus and method in which most of the relative movement between a dispensing head and the substrate to be coated is provided by the coating head. The moving head configuration reduces the system footprint and diminishes leveli...	01/30/2007
7082750	Pressurizer for a rocket engine A pressurizer for pressurizing a fluid includes: at least two storage tanks, where, for each storage tank, the pressurizer further includes: a propellant entrance valve, a propellant exit valve, a pressurant entrance valve, and a pressurant exit valve, where each of...	08/01/2006
7025578	Pump having air valve with integral pilot A pump comprising a valve housing and a spool slidably positioned within the valve housing. The spool has a supply face, a first end face, and a second end face, and is slidable between a first position wherein pressurized supply air is supplied to the supply face a...	04/11/2006
7007456	Dual chamber pump and method Disclosed is a pneumatically powered high-pressure and lightweight fluid pump. The pump is useful for pumping fuel for liquid rocket engines and for pumping water, such as for fire suppression. During operation of the pump, liquid is drained from a tank into a pump ...	03/07/2006
6949202	Apparatus and method for flow of process gas in an ultra-clean environment Processes for the addition or removal of a layer or region from a workpiece material by contact with a process gas in the manufacture of a microstructure are enhanced by the use of recirculation of the process gas. Recirculation is effected by a pump that has no sli...	09/27/2005
6929454	Thick matter pump In a thick matter pump, especially for delivering concrete, comprising two delivery cylinders, it is known to provide two position sensors in one of the two cylinders for control of the pistons. However, leakage of hydraulic fluid can lead to an imbalance of the two...	08/16/2005
6779983	Sludge pump with management system A viscous material (sludge) pump, a method of accurately estimating output of such a pump and a method of efficiently managing such a pump. The pump can be the single or double cylinder variety. The pump is calibrated to determine a calibrated sludge-weight output o...	08/24/2004
6609898	Process and device for pumping compressible materials with reduced pressure pulsation A hydraulic system for a reciprocating piston pump that includes an accumulator for producing a steady-pressure supply of compressible material to a distribution nozzle. The hydraulic system includes an adjustable means for constricting the flow of hydrau...	08/26/2003
5879137	Method and apparatus for pressurizing fluids A high-pressure valve assembly having a valve body that defines a preferably cylindrical valve cavity, a fluid inlet, a fluid outlet and a plurality of valve ports; and a fluid pressure intensifier assembly having a plurality of piston-plunger assemblies ...	03/09/1999
5616009	Mud pump A multicylinder, double acting improved mud pump is disclosed. The preferred embodiment incorporates a hydraulic powered piston in a cylinder which connects with a piston rod which, in turn, drives a second piston in a cylinder adapted to pump fluid mud. ...	04/01/1997
5401140	Closed loop sludge flow control system A system and method for controlling operation of a sludge material handling system is disclosed. The sludge material handling system includes a positive displacement piston/cylinder pump, a sludge material feed system which delivers sludge material to the...	03/28/1995
5267838	Severe service compressor system A severe service compressor for the reliable compression of dirty gasses using compressors with seals cooled by the hydraulic fluids doing the work of compression and seals isolated from the high temperatures of the compressed gasses by piston rings which...	12/07/1993
5257912	Sludge flow measuring system A system for the transport of high solids sludge includes a positive displacement pump for pumping sludge through a pipeline. The volume of sludge transported is accurately measured by determining the fill percentage during pumping cycle....	11/02/1993
5205722	Metering pump An apparatus for continuously pumping fluid at a substantially constant flow rate is disclosed. This apparatus is comprised of a metering pump, a rotary timing valve, at least three fluid transducers, and means for synchronizing said metering pump with sa...	04/27/1993
5127806	Thick matter pump with downstream shutoff device A thick matter pump has two feed cylinders, each including an opening coupled in fluid communication with a material feed tank containing matter to be pumped. A tube switch is adapted to be alternately coupled on its intake side to the openings of the fee...	07/07/1992
5106272	Sludge flow measuring system A system for the transport of high solids sludge includes a positive displacement pump for pumping sludge through a pipeline. The volume of sludge transported is accurately measured by determining the fill percentage by using a material flow signal, measu...	04/21/1992
5088898	Reciprocating pump A reciprocating pump comprises a plurality of pump sections, each pump section having a suction inlet and a discharge outlet, the inlets all connecting with a common passageway through which the pumped fluid is supplied and the outlets all connecting with...	02/18/1992
5049038	Fluid compressors A two stage fluid compressor is operated by a pneumatically operated relay valve controlled by a fluidic switching device in which switching pulses of pressurized control air are obtained automatically on movement of a compression piston in one of the com...	09/17/1991
5024584	Pump unit with adjustable piston stroke length A pump unit comprising co-operating, push-pull connected reciprocating pumps for the pumping in portions of contents to packing containers on a packing machine. The reciprocating pumps (1) each comprise a control piston (4) connected to the pump piston (6...	06/18/1991
5020974	Fluid compressors A fluid compressor includes a plurality of compression stages each operated sequentially by drive means comprising a pneumatically operated drive piston operating in a drive cylinder. Several embodiments are described and illustrated having different form...	06/04/1991
4750869	Method and apparatus for boosting gas from a low-pressure source to a high-pressure receptacle Method and apparatus for transferring and boosting the pressure of gas from a source to a receptacle by sequentially filling and compressing volumes of gas by displacing same with a fluid available at a higher pressure and utilizing pressure differential ...	06/14/1988
4729720	Apparatus for continuously generating hydraulic pressure An apparatus for generating high hydraulic pressure with reduced pulsations, comprising a valve case attached to a motor main body and having a plurality of pneumatic cylinder units arranged therearound, a rotary valve rotatably fitted in the valve case, ...	03/08/1988
4718826	Mobile pumping apparatus for abrasive slurries Mounted on a mobile platform, a dual hopper mixing tank having a hydraulically operated slide gate controlling the exit of a slurry. The mixed slurry is gravity fed to a pair of hydraulically operated pumps with the stroke of the pistons therein controlle...	01/12/1988
4714411	Fluid pressure intensifier device A fluid pressure intensifier device particularly suited for intensifying the pressure of a gas has a plurality of piston and cylinder compression stages of sequentially reducing volume connected by flow passages (FIG. 5b) for conducting fluid to be pressu...	12/22/1987
4690622	Liquid intensifier unit The unit comprises three liquid intensifiers, coupled together in juxtaposition, and fixed between a pair of plates. A support plate at the one end of the intensifiers mounts a rotary valve which, sequentially, supplies operative, low-pressure fluid to th...	09/01/1987
4687422	Continuous extrusion apparatus A dual pump is disclosed in which a single valve controls flow of power fluid to the pump piston. Cams on the pistons and push rods on the valve interact to control the valve timing....	08/18/1987
4676724	Mud pump A multicylinder, improved mud pump is disclosed, the preferred embodiment incorporating a hydraulically powered piston in a cylinder which connects with a piston rod which, in turn, drives a second piston in a cylinder adapted to pump mud. The first pisto...	06/30/1987
4621988	Liquid intensifier unit The unit comprises three liquid intensifiers, coupled together in juxtaposition, and fixed between a pair of plates. A support plate at the one end of the intensifiers mounts a rotary valve which, sequentially, supplies operative, low-pressure fluid to th...	11/11/1986
4611973	Pumping system and method of operating the same Improved mud pump comprised of plural cylinder pumping units, each cylinder unit consisting of a pumping compression chamber and two or more hydraulic driven expansion chambers, with one or more expansion chambers being employed to drive a pumping plunger...	09/16/1986
4606709	Liquid pump with sequential operating fluid pistons An intensifier pump has a primary fluid cylinder including a primary piston and which has shaft portions received within a separate coaxial fluid chamber. A secondary fluid cylinder having a secondary piston has shaft portions reciprocally received within...	08/19/1986
4527959	Drilling fluid pump providing a uniform, controlled pressure and flow rate A pump is provided for circulating drilling fluid and the like into a well during a well drilling process. The pump comprises a pair of double-ended piston assemblies hydraulically reciprocated in opposite directions by a common hydraulic drive arrangemen...	07/09/1985
4494912	Energy conserving air pump An energy conserving air pump includes an air operating pump section and a separate fluid pumping section capable of handling pure fluids in concentrate form or in solution, and operates by the use of a single slug of air in the air operating section to s...	01/22/1985
4269569	Automatic pump sequencing and flow rate modulating control system The present invention relates to a control system for automatic, continuous sequencing and modulating the flow rate of a plurality of high pressure pumps, having specific, albeit not exclusive application to mud pumps used in well drilling procedures. Mor...	05/26/1981
4213298	Self-reversing hydraulic control system and self-reversing pump incorporating such system A self-reversing hydraulic control system for use with a device to be driven in opposite directional modes, especially a self-reversing pump driven by such a device. The system depends upon a flow sensing element disposed to sense flow associated with mov...	07/22/1980
4103490	Apparatus for harnessing tidal power An apparatus for harnessing and extracting a portion of the power generated by the rise and fall of ocean tides. A tidal chamber is provided wherein the rise of the tide creates positive air pressure within the tidal chamber and the fall of the tide creat...	08/01/1978

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Class 417/347 - Single member controls motive fluid for each working member