Plural Cylinders Patents (Class 92/56)
  • Patent number: 8887619
    Abstract: Devices, systems, and techniques for managing heat generated in coils for wireless energy transmission are disclosed. Inductive coupling between two coils (e.g., a primary coil and a secondary coil) may be used to recharge the power source of an implantable medical device. A phase change material may be thermally coupled to the primary coil to absorb heat generated during the inductive coupling and reduce temperature increases of the primary coil. In one example, the phase change material may be configured to absorb heat from an energy transfer coil. A housing may be configured to contain the phase change material and a coupling mechanism may be configured to removably attach the housing to the energy transfer coil.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: November 18, 2014
    Assignee: Medtronic, Inc.
    Inventors: Todd A. Kallmyer, John E. Kast, David P. Olson, Randy S. Roles, Venkat R. Gaddam
  • Publication number: 20130000481
    Abstract: The present invention provides a cooling structure of a cylinder block, the cooling structure being capable of improving a cooling performance of sliding surfaces. A cylinder block includes a plurality of cylinders, and pistons are respectively inserted into the cylinders through openings. Each of the pistons performs reciprocating sliding on a sliding surface which defines the cylinder. A plurality of cooling depressions are formed on an outer peripheral surface of the cylinder block. Each of the cooling depressions extends from a front end surface of the cylinder block on a dividing wall located between the two adjacent cylinders and is formed by reducing the thickness of the dividing wall so as to reduce a thickness of a portion between the sliding surface and the outer peripheral surface.
    Type: Application
    Filed: November 16, 2010
    Publication date: January 3, 2013
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Takeshi Ohno, Mariko Ohno, Makoto Azuma
  • Patent number: 8240145
    Abstract: A hydrostatic assembly includes a pump having a yoke and an associated rotating group. The pump yoke has a bucket portion and an arm portion. At least one fluid passage extends through the pump yoke. The hydrostatic assembly also includes a motor having a yoke and an associated rotating group. The motor yoke also has a bucket portion and an arm portion. At least one fluid passage extends through the motor yoke. The arm portion of the pump yoke and the arm portion of the motor yoke have associated coupling portions for fluidly coupling the pump yoke to the motor yoke so that the at least one fluid passage in the pump yoke is in direct fluid communication with the at least one fluid passage in the motor yoke.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: August 14, 2012
    Assignee: Parker-Hannifin Corporation
    Inventors: Gerald Dyck, John Czepak, Francesco Michele Caldarella, Dayao Alex Chen, Stig Ingemar Bratt
  • Publication number: 20080121013
    Abstract: The present disclosure presents several embodiments for metering devices some of which also have pumping capability. The devices utilize one or more pistons located within a cylindrical rotor. As the cylindrical rotor is turned by a suitable torque/power source, a first face of each piston is exposed to an inlet supplying a fluid to be metered. The piston is then moved within the associated channel or bore within the rotor, allowing the volume of the channel to be filled with fluid. The continuing rotation of the rotor then removes the piston from the fluid supply and moves the channel through an angular displacement. The piston is then moved—either through applied power for active pistons or the force of the fluid supply for passive pistons—in the opposite direction, forcing the fluid out of the channel. In this way, a precise amount of fluid can be metered from each channel.
    Type: Application
    Filed: November 1, 2007
    Publication date: May 29, 2008
    Inventor: Behrokh Khoshnevis
  • Patent number: 7159395
    Abstract: A hydrostatic module is disclosed, including a pair of shafts rotatably supported by a frame. Two yokes are pivotally mounted on the frame, each having complimentary surfaces to the other yoke and to the frame, minimizing the space occupied by the yokes. Stop means are provided on the yokes and on the frame to limit the pivotal movement of the yokes. A hydrostatic power unit is carried by each yoke, each connected to one of the shafts. A control system, having a single piece control housing containing servo pistons, pivots the yokes. The servo pistons independently determine the orientation of the yokes. A single piece fluid control porting plate is secured to the control housing to route hydraulic fluid to multiple locations within the control housing. A fluid manifold serves as a main structural element, with intimate proximity between the manifold and the control housing allowing simplified fluid exchange therebetween.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: January 9, 2007
    Assignee: Sauer-Danfoss Inc.
    Inventors: John Fleming, Scott Meyer, Doug Kardell, Christopher P. Masini
  • Patent number: 6996980
    Abstract: A hydrostatic module is disclosed, including a pair of shafts rotatably supported by a frame. Two yokes are pivotally mounted on the frame, each having complimentary surfaces to the other yoke and to the frame, minimizing the space occupied by the yokes. Stop means are provided on the yokes and on the frame to limit the pivotal movement of the yokes. A hydrostatic power unit is carried by each yoke, each connected to one of the shafts. A control system, having a single piece control housing containing servo pistons, pivots the yokes. The servo pistons independently determine the orientation of the yokes. A single piece fluid control porting plate is secured to the control housing to route hydraulic fluid to multiple locations within the control housing. A fluid manifold serves as a main structural element, with intimate proximity between the manifold and the control housing allowing simplified fluid exchange therebetween.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: February 14, 2006
    Assignee: Sauer-Danfoss Inc.
    Inventors: John Fleming, Scott Meyer, Doug Kardell, Christopher P. Masini
  • Patent number: 6988441
    Abstract: An engine includes a rotatable member with one or more cylinders disposed tangentially around its circumference. There are one or more corresponding pistons, each piston is associated with a piston lever pivoted eccentric to the rotatable member. Movement of each piston is controlled so that combustion energy is transmitted to the rotatable member by the cylinder moving away from the piston. Both the cylinders and pistons rotate continuously relative to a stationary part of the engine.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: January 24, 2006
    Assignee: Harcourt Engine Pty Limited
    Inventors: Dougal Lamont Harcourt, Robert James Selby, William Lewis White
  • Publication number: 20040163532
    Abstract: An engine includes a rotatable member with one or more cylinders disposed tangentially around its circumference. There are one or more corresponding pistons, each piston is associated with a piston lever pivoted eccentric to the rotatable member. Movement of each piston is controlled so that combustion energy is transmitted to the rotatable member by the cylinder moving away from the piston. Both the cylinders and pistons rotate continuously relative to a stationary part of the engine.
    Type: Application
    Filed: March 2, 2004
    Publication date: August 26, 2004
    Applicant: Harcourt Engine Pty. Limited.
    Inventors: Dougal Lamont Harcourt, Robert James Selby, William Lewis White
  • Patent number: 6705202
    Abstract: An engine includes a rotatable member with one or more cylinders disposed tangentially around its circumference. There are one or more corresponding pistons, each piston is associated with a piston lever pivoted eccentric to the rotatable member. Movement of each piston is controlled so that combustion energy is transmitted to the rotatable member by the cylinder moving away from the piston. Both the cylinders and pistons rotate continuously relative to a stationary part of the engine.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: March 16, 2004
    Assignee: Harcourt Engine Pty Limited
    Inventors: Dougal Lamont Harcourt, Robert James Selby, William Lewis White
  • Patent number: 6492033
    Abstract: A lead-free plain bearing is formed by dispersing an alloy powder formed from 7-13 mass percent of Sn, 0.1-5 mass percent of Ag, and Cu on a backing, such as a steel plate, and sintering. The alloy powder may further include one or more of 0.05-0.5 mass percent of molybdenum disulfide powder and 0.1-2 mass percent of graphite powder. The bearing surface may be rough finished by machining to a roughness of 0.3-1 &mgr;m Ra and then fine finished by polishing to a roughness of at most 0.1 &mgr;Ra.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: December 10, 2002
    Assignee: Senju Metal Industry Co., Ltd.
    Inventors: Issaku Sato, Naoki Sato
  • Patent number: 5205124
    Abstract: A hydraulic piston type motor having a rotating piston barrel abutting a fixed porting plate or head with a starting charge device including a differential area piston operating to supply a limited hydrostatic pressure between the porting plate and rotating barrel to reduce starting friction and improve starting torque.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: April 27, 1993
    Assignee: Caterpillar Inc.
    Inventor: Tadeusz Budzich, deceased
  • Patent number: 5182977
    Abstract: An hydraulic centrifugal piston motor having mulitple piston circumferentially disposed at right angle to shaft axis, having a rotational power moment that occurs twice each revolution for each cylinder. The power stroke for each cylinder would occur for a duration of 90 degrees twice during each 360 degree operating cycle. Hydraulic input is applied to opposing pairs of cylinders and overlap of successive power strokes provide rotational balance and cancels net reaction forces applied to the bearings. Another feature of the motor would be the particular design of the power transfer device. The thrust of the power transfer device is applied axially to the drive shaft providing a smooth transfer between the hydraulic input power and the mechanical output power.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: February 2, 1993
    Inventor: William Gulbrantson
  • Patent number: 4748895
    Abstract: The former art provides multi-stroke hydrostatic motors, which perform at a single revolution of the rotor multiple inward and outward strokes of the pistons. A high torque was thereby obtained. The invention discovers, that the know multi-stroke motors have still relatively short piston strokes in relation to the diameter of the rotor.The invention increases the efficiency of multiple stroke motors by the provision of control communications to control the flow of fluid pressure into pockets open to the piston faces and cylinder walls, whereby the torque of the rotor is transferred from the pistons to the cylinder walls by high pressure fluid in the pockets. The invention also provides radial guide extensions to enlarge the stroke of the pistons in a given size and weight of the device combined with the partial movement of the pockets along the guide extensions.
    Type: Grant
    Filed: November 19, 1986
    Date of Patent: June 7, 1988
    Inventor: Karl Eickmann
  • Patent number: 4058088
    Abstract: An oscillating piston engine capable of running on a working fluid such as steam or compressed air comprises a bank of cylinders mounted for rotation in unison to turn a shaft in an engine block, pistons mounted for oscillation in the cylinders and rotatable in unison relative to the cylinders to turn another shaft in the engine block, control means operable in response to rotation of the cylinders for supplying and exhausting working fluid to and from opposite ends of the cylinders in alternating timed relation to cause the pistons to oscillate in the cylinders and pistons, and gearing means connecting the piston shaft and the cylinder shaft to an output shaft for converting the oscillating motion of the pistons and cylinders into unidirectional rotation of the output shaft.
    Type: Grant
    Filed: August 11, 1976
    Date of Patent: November 15, 1977
    Inventor: Jesse C. Brown
  • Patent number: 3974801
    Abstract: An oscillating piston internal combustion engine comprises a bank of combustion chambers mounted on the front of an engine block for rotation in an annular path to rotate an output shaft protruding from the rear of the block. Gearing inside the block converts oscillating motion of the pistons and cylinders into unidirectional rotation of the output shaft.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: August 17, 1976
    Inventor: Jesse C. Brown
  • Patent number: 3968776
    Abstract: A rotary crankless machine in which there is a rotary shaft, a rotary cylinder block, and a stationary housing, all concentrically disposed about a common axis and in which the housing has a central annular manifold block with inlet and outlet passages disposed midway between the ends of the housing. The rotary cylindrical block and shaft are rotatably coupled together and the rotary cylindrical block has a pair of sets of inwardly directed cylinders each of which extends from adjacent the outer wall of the cylinder block inwardly towards the manifold block and disposed so as to be selectively in communication with the inlet and outlet passages of the manifold block as the cylinder block rotates, and in each of which a piston is reciprocated. The longitudinal axis of each cylinder is substantially inclined inwardly with respect to the common axis of the machine and with respect to the transverse plane perpendicular to the axis.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: July 13, 1976
    Assignee: Rund Rotary Engines, Inc.
    Inventor: Larry D. Rund