Patents by Inventor Keith Pullen
Keith Pullen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9810485Abstract: A heat exchanger comprises a stack of mutually spaced apart plates. The plates are separated by respective spacings therebetween. Alternate spacings respectively provide a flow path for a first fluid and a second fluid. The heat exchanger further comprises a first header for inflow of the first fluid and a second header for outflow of the first fluid. The first and second headers are connected to the plate stack by flexible tubular ducting means.Type: GrantFiled: June 20, 2014Date of Patent: November 7, 2017Assignee: Hiflux LimitedInventors: David Barnes, Tanzi Besant, Albert Demargne, Keith Pullen
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Publication number: 20140299299Abstract: A heat exchanger comprises a stack of mutually spaced apart plates. The plates are separated by respective spacings therebetween. Alternate spacings respectively provide a flow path for a first fluid and a second fluid. The heat exchanger further comprises a first header for inflow of the first fluid and a second header for outflow of the first fluid. The first and second headers are connected to the plate stack by flexible tubular ducting means.Type: ApplicationFiled: June 20, 2014Publication date: October 9, 2014Inventors: David Barnes, Tanzi Besant, Albert Demargne, Keith Pullen
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Patent number: 8776869Abstract: A heat exchanger comprises a stack of mutually spaced apart plates. The plates are separated by respective spacings therebetween. Alternate spacings respectively provide a flow path for a first fluid and a second fluid. The heat exchanger further comprises a first header for inflow of the first fluid and a second header for outflow of the first fluid. The first and second headers are connected to the plate stack by flexible tubular ducting means.Type: GrantFiled: November 15, 2010Date of Patent: July 15, 2014Assignee: Hiflux LimitedInventors: David Barnes, Tanzi Besant, Albert Demargne, Keith Pullen
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Publication number: 20130015825Abstract: The present invention provides a flywheel apparatus for use as an energy storage system, the apparatus comprising: a housing unit having a base; a flywheel assembly mounted within the housing unit, the assembly comprising a flywheel supported by a rotatable axle arranged to enable rotation of the assembly within the housing, the axle defining an axis of rotation; stabilising means located within the housing unit arranged to stabilise rotation of the flywheel assembly about the rotation axis; and levitation means arranged to levitate the flywheel assembly above the base of the housing unit, in order to create a clearance between the flywheel assembly and the base of the housing unit.Type: ApplicationFiled: January 18, 2011Publication date: January 17, 2013Applicant: THE CITY UNIVERSITYInventor: Keith Pullen
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Publication number: 20110056665Abstract: A heat exchanger comprises a stack of mutually spaced apart plates. The plates are separated by respective spacings therebetween. Alternate spacings respectively provide a flow path for a first fluid and a second fluid. The heat exchanger further comprises a first header for inflow of the first fluid and a second header for outflow of the first fluid. The first and second headers are connected to the plate stack by flexible tubular ducting means.Type: ApplicationFiled: November 15, 2010Publication date: March 10, 2011Applicant: Hiflux LimitedInventors: David Barnes, Tanzi Besant, Albert Demargne, Keith Pullen
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Publication number: 20080012344Abstract: A wave energy converter with air compression (WECWAC) includes a cylinder and a piston located within the cylinder dividing the cylinder into an upper chamber and a lower chamber. The cylinder is fixedly attached to a spar whose up/down (heave) motion is restrained. The piston is fixedly attached to, and driven by, a float which moves generally in phase with the waves. Under typical wave conditions the piston functions to compress air within the upper chamber on its up stroke and within the lower chamber on its down stroke, i. e., the system is thus double-acting. In still water, the spar and cylinder combination is designed to drift down into the body of water relative to the piston whereby the size/volume of the upper chamber is decreased (while that of the lower chamber is increased). For small amplitude waves the piston continues to compress air in the upper chamber and this asymmetrical compression continues until the waves reach a predetermine level when “double-action” is resumed.Type: ApplicationFiled: May 16, 2007Publication date: January 17, 2008Inventors: Keith Buffard, Mark Draper, Keith Pullen, Robin Rhodes
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Publication number: 20070251671Abstract: A heat exchanger comprises a stack of mutually spaced apart plates. The plates are separated by respective spacings therebetween. Alternate spacings respectively provide a flow path for a first fluid and a second fluid. The heat exchanger further comprises a first header for inflow of the first fluid and a second header for outflow of the first fluid. The first and second headers are connected to the plate stack by flexible tubular ducting means.Type: ApplicationFiled: July 6, 2007Publication date: November 1, 2007Applicant: Hiflux LimitedInventors: David Barnes, Tanzi Besant, Albert Demargne, Keith Pullen
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Patent number: 7150149Abstract: An apparatus for extracting power from a fluid flow comprising a fluid driveable engine, a fluid directing arrangement defining a channel in the flow of a primary fluid, the channel with a flow accelerating constriction shaped. The primary fluid accelerates as it passes through the flow accelerating constriction, the arrangement being formed to impart a rotational flow component to the primary fluid entering the constriction thereby creating a radial pressure gradient in the primary fluid as it passes through the constriction. A conduit for directing flow of a driving fluid different from the primary fluid and in fluid communication with the engine and a portion of the channel having accelerated fluid flow. Flow of driving fluid through the conduit drives the engine and delivers driving fluid to the fluid directing arrangement such that it is drawn substantially along the central axis of the rotational flow.Type: GrantFiled: March 19, 2003Date of Patent: December 19, 2006Assignee: Hydroventuri LimitedInventors: Geoffrey Kenneth Rochester, Keith Pullen
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Patent number: 7132758Abstract: An apparatus for extracting power from a fluid flow comprises a fluid driveable engine, a conduit, disposed to enable fluid communication between a portion of the fluid flow, the fluid driveable engine and a transmission fluid, the fluid in the fluid flow and the transmission fluid being different fluids and the portion of the fluid flow being at a lower pressure than the transmission fluid by virtue of its flow rate, thus causing the transmission fluid to be drawn through the conduit to become entrained in the fluid flow, the fluid driveable engine being arranged such that the flow of the transmission fluid along the conduit acts to drive the fluid driveable engine.Type: GrantFiled: March 19, 2003Date of Patent: November 7, 2006Assignee: Hydroventuri LimitedInventors: Geoffrey Kenneth Rochester, Keith Pullen, John Hassard
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Publication number: 20050099011Abstract: An apparatus for extracting power from a fluid flow comprises a fluid driveable engine, a conduit, disposed to enable fluid communication between a portion of the fluid flow, the fluid driveable engine and a transmission fluid, the fluid in the fluid flow and the transmission fluid being different fluids and the portion of the fluid flow being at a lower pressure than the transmission fluid by virtue of its flow rate, thus causing the transmission fluid to be drawn through the conduit to become entrained in the fluid flow, the fluid driveable engine being arranged such that the flow of the transmission fluid along the conduit acts to drive the fluid driveable engine.Type: ApplicationFiled: March 19, 2003Publication date: May 12, 2005Applicant: HYDROVENTURI LIMITEDInventors: Geoffrey Rochester, Keith Pullen, John Hassard
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Publication number: 20050081517Abstract: An apparatus for extracting power from a fluid flow, the apparatus comprises a fluid driveable engine, a fluid directing arrangement formed to define a channel in the flow of a primary fluid, the channel having a flow accelerating constriction shaped such that the primary fluid accelerates as it passes through the flow accelerating constriction, the fluid directing arrangement being formed to impart a rotational flow component to the primary fluid entering the flow accelerating constriction thereby creating a radial pressure gradient in the primary fluid as it passes through the flow accelerating constriction, a conduit for directing flow of a driving fluid, the driving fluid and the primary fluid being different fluids, the conduit being in fluid communication with the fluid driveable engine and a portion of the channel having accelerated fluid flow and in which the flow of driving fluid through the conduit via the rotational flow of the primary fluid in the flow accelerating constriction acts to drive the fType: ApplicationFiled: March 19, 2003Publication date: April 21, 2005Inventors: Geoffrey Rochester, Keith Pullen