Class 417/389 - Plural collapsible walls

Subclass of Class 417 - Pumps
Definition: Apparatus in which both the movable driving member and the
No. of patents: 37
Last issue date: 01/15/2008

Number	Title	Issue Date
7318489	Hydraulic motor arrangement and method of operating a hydraulic motor A hydraulic motor for use in subterranean drilling operations in which a drive fluid within a first reservoir is forced through the motor by a high pressure working fluid, such as drilling mud, the drive fluid entering a second reservoir upon exiting the motor. Upon...	01/15/2008
7269961	Thermodynamic cycle apparatus and method A compressor and heat pump combination has an active chamber and a passive chamber, each with its own hot plate and cold plate. The two chambers are joined along an edge by a membrane that largely transmits pressure, largely insulates against temperature transfer, a...	09/18/2007
7036204	Component to component sealing method A method for sealingly coupling a first component and a second component. The method includes forming a polymer male portion attached to the first component. The male portion has a first axis and a first bore extending therethrough. The male portion has a first stop...	05/02/2006
6945926	Muscle energy converter A muscle energy converter for a patient. The converter includes a casing having a fluid port. The converter includes a bellows mechanism disposed in the casing adapted to contain fluid. The converter includes an actuator arm mechanism adapted to be attached to a ten...	09/20/2005
6846166	Reciprocating diaphragm pump with degassing valves 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...	01/25/2005
6561774	Dual diaphragm pump A dual diaphragm pump comprises a first chamber, a second chamber, a mechanical link, and a drive mechanism. The first chamber comprises a first cavity and a first diaphragm. The first chamber couples a pump inlet to a pump outlet. The second chamber comp...	05/13/2003
5934886	Metering pump with piston and diaphragms A diaphragm pump is powered by fluctuating pressure in a pressurized conduit. A three way valve is cycled to alternately pressurize and vent the pump. A power diaphragm drives a piston having a skirt with a reduced end wall to displace a quantity of hydra...	08/10/1999
5720177	Multichambered pump for a vapor compression refrigeration system A device and method of operating a diaphragm pump having at least three chambers is used in a vapor compression refrigeration system. Each chamber contains a fluid having a different set of pressure and temperature characteristics. Adjacent chambers are s...	02/24/1998
5667368	Diaphragm metering pump including improved leak detection diaphragm A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outsid...	09/16/1997
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
5642576	Suction dredge pump apparatus A suction dredge pump apparatus includes a manifold having a body defining a plurality of compartments, an intake chamber disposed adjacent to the compartments along upper ends thereof, a plurality of intake valves connected to the upper ends of the compa...	07/01/1997
5641270	Durable high-precision magnetostrictive pump A magnetostrictive pump is provided which makes use of a magnetostrictive element which, when an alternating magnetic field is applied to it, compresses a chamber containing a working fluid. A bellows located within the working fluid is repeatedly compres...	06/24/1997
5616012	Ammonia pump The pump is formed by a body having a cavity with a piston chamber in which a piston is reciprocated. A rotatable crank shaft is provided to reciprocate the piston along inward and outward strokes to draw ammonia into the pump by way of an inlet and then ...	04/01/1997
5391060	Air operated double diaphragm pump The design of an air operated double diaphragm pump provides improved assembly, mounting flexibility, multiple plumbing combination including check valves which allow the pump to be mounted in any position without effecting its ability to prime or pump. A...	02/21/1995
5388576	Inflatable resuscitation device A pulmonary resuscitator is set forth of the type having a compressible bladder to be depressed to supply air to a mask. Both the compressible bladder and mask have integral therewith a network of inflatable tubes which when pressurized resiliently rigidi...	02/14/1995
5370507	Reciprocating chemical pumps Chemical pumps are disclosed in which all parts wetted by the fluid being pumped are made of fluoroplastic material, with the pumps having check valves that include floating ball members and O-rings positioned adjacent to the floating ball members. The re...	12/06/1994
4975026	Free-piston heat pump An end stop is disclosed for limiting the maximum displacement of a flexible member so as to minimize stress on this member and thus provide an extended surface life. The flexible member is rigidly supported at at least two spaced-apart points such that t...	12/04/1990
4886428	Pump arrangement, particularly for pumping water from deep wells A pump arrangement particularly intended for pumping water from deep wells, in which a feed pump unit (2) located at ground level transmits power and motion to delivery pump unit (3), so that during a working stroke of the pump arrangement water is raised...	12/12/1989
4846831	Manual back-up drive for artificial heart A manual back-up emergency drive device for air driven artificial hearts, particularly for the "Jarvik-7" heart, is adapted to be instantly connected to the air drive lines for the heart in the event of power and air pressure failures and manually actuate...	07/11/1989
4822257	Pump arrangement, particularly for pumping water from deep wells A pump arrangement particularly intended for pumping water from deep wells, in which a feed pump unit (2) located at ground level transmits power and motion to delivery pump unit (3), so that during a working stroke of the pump arrangement water is raised...	04/18/1989
4687424	Redundant piston pump for the operation of single or multiple chambered pneumatic blood pumps A redundant, pneumatic driver for a blood pump in which a pair of pistons are contained in a common cylinder and their stroke rates and lengths are selectively controlled by a controller which non-invasively senses the circulatory system requirements of t...	08/18/1987
4560324	Automatic purger for a hydraulically controlled double diaphragm pump The automatic purger has an intermediate chamber (11) one of the walls of which is formed by an elastic diaphragm (10), termed front diaphragm, whereas the other wall is formed by a second elastic diaphragm (12), termed rear diaphragm. This chamber is con...	12/24/1985
4536136	Film-made pump driven by the filling effect of a fluid on filling into a chamber made of film A method and apparatus advantageously using the shapeless and flowing characteristics of a fluid. The fluid is contained with a suitable film chamber having a given shape; a frame or the like may be used as a supporting means for the chamber. The frame-sh...	08/20/1985
4524466	Continuous rotation reversible pitch axial thrust heart pump A continuous and unidirectional rotation reversible pitch axial thrust heart pump having a blood handling housing with first inlet and outlet check valves connected to the housing and second inlet and outlet check valves connected to the housing. A first ...	06/25/1985
4430048	Diaphragm pump with a diaphragm clamped in pressure-balancing arrangement In a diaphragm pump the diaphragm separating the delivery chamber from the working chamber is clamped between a cylinder body and a cylinder cover in pressure-balancing arrangement. For this purpose a pressure-balancing space is provided to be radially ou...	02/07/1984
4350477	Pneumatic pulsatile fluid pump A portable pumping system for administering fluids intravenously to a patient. The system has a tube connected between the fluid source and the patient with one-way valves at each end of the tube to limit the flow to one direction. A middle portion of the...	09/21/1982
4344743	Piezoelectric driven diaphragm micro-pump A piezoelectric driven variable volume having a chamber pump with a flexible tube and a non-compressible fluid therein. Solenoid operated valves are associated with the inlet and outlet of the flexible tube. A control circuit sequences the valves and the ...	08/17/1982
4178133	Double-acting flexible tube pump A pump, characterized by flexible tubes which are cyclically expanded and contracted to cause fluid to be pumped, comprises a pair of liquid filled cylinders each containing a flexible tube connected to inlet and outlet valves, a liquid filled control cyl...	12/11/1979
4173796	Total artificial hearts and cardiac assist devices powered and controlled by reversible electrohydraulic energy converters Total artificial hearts and circulatory assist devices, including left ventricular assist devices. The invention relates to electrohydraulic energy converter systems, whereby electric energy from a power source, which may be a battery or other source, is ...	11/13/1979
4158530	Pumping apparatus comprising two collapsible chambers A pump having two collapsible pumping chambers connected in series is coupled to a pump drive mechanism which opens and closes each chamber in a sequence that produces pumping action....	06/19/1979
4133616	Stroke volume limiter for collapsible wall blood pump system A pneumatic pump adapted primarily as a left ventricular heart assist device includes a flexible bladder with a rigid housing. A pneumatic driver applies rhythmical pulses between the bladder and the housing to repetitively collapse the bladder and establ...	01/09/1979
4116589	Extracorporeal pulsatile blood pump comprised of side by side bladders Extracorporeal blood pumping apparatus for use, for example in cardiopulmonary bypass procedures, left ventricle assist, hemodialysis and the like. The pulsatile pump apparatus may comprise an elongated driver balloon and a similar blood pumping balloon p...	09/26/1978
4056095	Control device for medical and surgical uses A control device in implantable sub-cutaneously for use in medicine and surgery. It is actuable by pressing on a sub-cutaneous membrane. It comprises a first chamber closed by the membrane which is placed on one surface of its casing and contains an incom...	11/01/1977
4015590	Balloon activated blood pump A pneumatically driven balloon activated blood pump for connection either in parallel with or to one side of the heart for temporary mechanical support of an inadequately functioning heart. A tubular conduit with a sealable opening for insertion or remova...	04/05/1977
3955557	Blood pump for use in an artificial heart or such purpose This invention relates to a blood pump for use in an artificial heart including an inlet pump system and an output pump system in series with each pump including branch tubes communicating with first main inlet tube, each branch tube being equipped with a...	05/11/1976
3951572	Apparatus for pumping cement slurry A system for pumping cement slurry comprising two pumps connected in parallel in a piping system, each pump comprising a flexible tubular bladder connected between two tubular elements and surrounded by a cylindrical housing so as to provide a closed annu...	04/20/1976
3937599	Pumping system using solar energy A pumping system comprising a pumping unit formed by a motor and a pump and adapted to raise a liquid from an underground level to a utilization level, a vaporizable fluid flowing in a closed circuit between a solar evaporator and a condenser, the said mo...	02/10/1976

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Class 417/389 - Plural collapsible walls