Speed Controlled Patents (Class 418/17)
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Patent number: 11814961Abstract: A positive displacement expander with an operating fluid chamber of expansive volume regulated by a shifting head. The shifting head may enhance rotation of a housing utilized to rotate a shaft for providing work to any of a variety of power retrieval devices. Additional efficiencies may also be realized through unique hydraulic layouts for circulating of the operating fluid from a heat exchanger, through the rotary device and to a cold exchanger for continuous operating of the rotary device.Type: GrantFiled: August 20, 2021Date of Patent: November 14, 2023Inventor: Joshua M. Schmitt
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Patent number: 9091269Abstract: The invention provides a device for generating high pressure air. The device comprises a block having an external surface and an internal surface, said internal surface defining an internal cavity in said block. A rotor located inside said cavity is capable of rotating about under the influence of wind energy. The block is capable of moving relative to the rotor in a direction orthogonal to the axis of rotation of the rotor so as to vary the position of the rotor within the cavity. A plurality of vanes extend from the rotor, and are coupled to the rotor in such a manner that, in every position that the block is capable of adopting relative to the rotor, the rotor is capable of rotating within the cavity while maintaining a seal between each vane and the internal surface of the block. There is a gas inlet channel and a gas outlet channel on an opposite side of the block to the gas inlet channel.Type: GrantFiled: July 9, 2009Date of Patent: July 28, 2015Assignee: Windfuel Mills Pty LtdInventor: Robert Lloyd
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Patent number: 8915724Abstract: A scroll compressor includes an orbiting scroll member, a drive mechanism accommodation space, a rotary shaft, a drive bushing, an upstream space, a downstream space, a first communication passage and a second communication passage. The upstream space and the downstream space are formed in the drive mechanism accommodation space by a plain bearing, the drive bushing and an eccentric pin of the rotary shaft. The second communication passage passes through at least the drive bushing and allows the upstream space and the downstream space to communicate with each other. A control valve is disposed in the second communication passage. Centrifugal force of the control valve developed when the rotary shaft is rotated at a predetermined speed or higher causes the control valve to move in a direction in which the second communication passage is opened, thereby to allow the upstream space and the downstream space to communicate with each other.Type: GrantFiled: March 18, 2013Date of Patent: December 23, 2014Assignee: Kabushiki Kaisha Toyota JidoshokkiInventors: Akihiro Nakashima, Shinichi Sato, Akio Saiki
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Publication number: 20130209302Abstract: An oil pump includes a capacity adjustment mechanism that changes the pump capacity by moving a tubular body in a tube radial direction, with a pump chamber formed between the tubular body and an outer circumference side of a rotor, a first spring biasing the tubular body in a direction in which pump capacity increases, a control valve that converts oil pressure of the oil pump into control pressure and causes the control pressure to act on the capacity adjustment mechanism, and a second spring biasing a valve body in order to set the control pressure in the control valve. The relationship of the biasing forces of the first and second springs is set so that pump capacity is set to maximum when the engine rotational speed is less than a predetermined value, and so that pump capacity is reduced when the engine rotational speed exceeds a predetermined value.Type: ApplicationFiled: December 6, 2011Publication date: August 15, 2013Applicant: AISIN SEIKI KABUSHIKI KAISHAInventors: Hisashi Ono, Shinji Kazaoka
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Publication number: 20130039790Abstract: A variable displacement lubricant pump includes a first plunger which pushes a shiftable control ring into a high pumping volume direction. A pump rotor comprises radially slidable vanes which rotate in the control ring. A pressure control system comprises a first pressure control chamber wherein a first plunger is axially moveable. A first pressure conduit connects a pump outlet port with the first pressure control chamber. A first pressure control valve controls a pressure in the first pressure control chamber. A second pressure control valve between an outlet opening in a side wall of the first pressure control chamber and a low pressure source controls the outlet opening and is a centrifugal valve mechanically connected with the pump rotor which closes at a high rotational speed of the pump rotor. The outlet opening is closed by the first plunger in a low pumping volume position and opened in a high pumping volume position.Type: ApplicationFiled: March 5, 2010Publication date: February 14, 2013Applicant: PIERBURG PUMP TECHNOLOGY GMBHInventors: Carmine Cuneo, Giacomo Armenio
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Patent number: 7946833Abstract: The present invention provides a vane pump having variable displacement and high efficiency. The variable displacement vane pump includes a plurality of elongate, axially extending inserts disposed in the rotor. One of the inserts is disposed between every adjacent vane pair. The inserts are received within axially extending pockets in the rotor and are coupled to the rotor by springs. At lower rotational speeds, the inserts are retracted and the displacement of the pump chambers is at maximum. At higher rotational speeds, the inserts are advanced into the pump chambers, effectively reducing their displacement. Thus, the variable displacement pump compensates for the varying drive speed and achieves improved uniformity of fluid flow by providing maximum displacement at low speeds and reduced displacement at higher speeds.Type: GrantFiled: December 5, 2007Date of Patent: May 24, 2011Assignee: GM Global Technology Operations LLCInventor: Gregory Mordukhovich
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Publication number: 20090148324Abstract: The present invention provides a vane pump having variable displacement and high efficiency. The variable displacement vane pump includes a plurality of elongate, axially extending inserts disposed in the rotor. One of the inserts is disposed between every adjacent vane pair. The inserts are received within axially extending pockets in the rotor and are coupled to the rotor by springs. At lower rotational speeds, the inserts are retracted and the displacement of the pump chambers is at maximum. At higher rotational speeds, the inserts are advanced into the pump chambers, effectively reducing their displacement. Thus, the variable displacement pump compensates for the varying drive speed and achieves improved uniformity of fluid flow by providing maximum displacement at low speeds and reduced displacement at higher speeds.Type: ApplicationFiled: December 5, 2007Publication date: June 11, 2009Inventor: Gregory Mordukhovich
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Publication number: 20080170950Abstract: A rotary pump for producing a pressure medium flow for a consumer, includes a pump housing in which a curved ring is inserted. A rotor is rotatably borne on a drive shaft in the curved ring. The rotor carries displacement elements at a tangential distance to one another which form a pump chamber between the rotor and the curved ring with a suction opening. A pressure medium-activated adjusting device is operable for changing the eccentricity of the curved ring relative to the rotor, and includes a first pressure chamber and a second pressure chamber fluidically and tangentially distanced from the first pressure chamber The pressure in the first and second pressure chambers is controlled by a flow control valve, the low pressure chamber of which communicates with a first control line on a downstream side of a metering orifice.Type: ApplicationFiled: February 5, 2008Publication date: July 17, 2008Inventor: Johann Merz
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Patent number: 5490769Abstract: An infinitely variable scroll-type fluid displacement apparatus comprises an orbiting scroll having a spiral element interfitted with a spiral element of a base scroll. The orbiting scroll and the base scroll are both rotatably disposed in the compressor housing and operationally connected through a rotation prevention mechanism. The orbiting scroll is continuously driven by a drive shaft, even when fluid is not displaced through the scroll-type fluid displacement apparatus. The base scroll is mounted on a carrier which has magnetic rotor elements extending in close proximity to an electromagnet. When the electromagnet is energized, an attraction force is generated between the electromagnet and the magnetic rotor elements, thereby imparting a braking force to the base scroll. Depending on the amount of braking force imparted to the base scroll, the capacity of the scroll-type fluid displacement apparatus can be infinitely varied.Type: GrantFiled: November 14, 1994Date of Patent: February 13, 1996Assignee: Sanden International (U.S.A.), Inc.Inventor: John L. Calhoun
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Patent number: 5203297Abstract: A rotary engine has a plurality of pistons rigidly connected as a single assembly, which pistons advance in a substantially toroidal chamber continuously along an annular path. Included in each of at least one firing position along this path is an inwardly projecting valve defining combustion zones within the chamber, and preventing communication between adjacent combustion zones. Also included in the firing positions are at least one exhaust port, an inlet port and valve, and a spark plug. Power may be taken from a central shaft along the axis of rotation of the piston assembly. The floor of the chamber comprises a movable wall which rises with increasing rotational speed to decrease effective engine displacement.Type: GrantFiled: January 27, 1992Date of Patent: April 20, 1993Inventor: Dennis D. Iversen
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Patent number: 4428195Abstract: A rotary vacuum pump is proposed, having a rotor with vanes which rotates eccentrically within a housing bore. Each vane is coupled with a body which is ineffective at relatively low pump rpm; however, at higher rpm, the body engages the vane in such a manner that it removes the vane from its track within the housing bore.In this manner, an rpm-dependent shutoff device is created for the pump. In cooperation with the furnishing of underpressure as an auxiliary pressure in motor vehicles, the pump is used to supplement the underpressure which prevails when the internal combustion engine is at low, idling rpm; this prevailing underpressure is at a very low pressure level, and so when it is thus supplemented there is sufficient auxiliary vacuum force available over the entire rpm range.Type: GrantFiled: April 22, 1981Date of Patent: January 31, 1984Assignee: Robert Bosch GmbHInventors: Ernst Linder, Helmut Rembold, Walter Teegen
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Patent number: 3941505Abstract: Method and apparatus for pumping fuel to jet engines and the like utilizing at least two stages, the first of which is a main stage including a centrifugal pump, together with a secondary stage including a positive displacement pump. The two pump stages are driven from a common drive means. In the new system, the positive displacement pump is used as a startup pump and the centrifugal pump is the sole pumping means employed during conditions of higher fuel demand. Speed responsive means are provided in conjunction with the positive displacement pump, which means are responsive to the speed of the centrifugal pump, the speed responsive means being used to terminate pumping action by the positive displacement upon the centrifugal pump reaching a predetermined speed.Type: GrantFiled: June 25, 1973Date of Patent: March 2, 1976Assignee: TRW Inc.Inventors: Pius J. Nasvytis, Milton W. Mueller