Three Or More Cylinders Arranged In Parallel, Radial Or Conical Relationship With Rotary Transmission Axis Patents (Class 91/6.5)
  • Patent number: 11162481
    Abstract: A swashplate-type axial piston machine includes a housing, a first pivot bearing received in the housing, a drive shaft rotatably mounted in respect of an axis of rotation, a cylinder drum, a control plate, a third control aperture in the plate, and a first channel arranged in the housing. The first pivot bearing delimits a first and second housing space from one another. The drum and the plate are arranged in the first housing space. The plate has at least a first and at least a second control aperture. The first aperture is in fluidic exchange connection with a first fluid connection on the housing. The second aperture is in fluidic exchange connection with a second fluid connection on the housing. The third aperture is arranged in the peripheral direction between a first and a second aperture. The first channel fluidically connects the third aperture to the second housing space.
    Type: Grant
    Filed: April 11, 2019
    Date of Patent: November 2, 2021
    Assignee: Robert Bosch GmbH
    Inventors: David Breuer, Timo Nafz
  • Patent number: 11008862
    Abstract: A hydrostatic piston engine comprises a housing with a cylinder drum with cylinder bores mounted rotatably therein. Each of the cylinder bores receives a working piston in a longitudinally displaceable manner, via which a hydrostatic working chamber is delimited by the cylinder bore. The hydrostatic working chamber has an opening on an outer surface of the cylinder drum by which, when the cylinder drum rotates, outlets of a high-pressure chamber and of a low-pressure chamber of the piston engine and a reversing surface arranged between the two outlets in the rotational direction can be passed over in alternating fashion. At least one pressurizing medium channel is provided which, on one hand, opens out in the reversing surface and, on the other, into a pressurizing medium trough of the piston engine.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: May 18, 2021
    Assignee: Robert Bosch GmbH
    Inventors: David Breuer, Timo Nafz, Stefan Merz
  • Patent number: 10859061
    Abstract: An axial piston machine may include a housing, a guide, a shaft, at least two cylinders each delimited by an associated cylinder wall, at least two pistons, a feed configured to supply a working fluid, an exhaust configured to discharge the working fluid, and at least one actuator configured to open and close a plurality of secondary outlets. Each associated cylinder wall may include a primary outlet and a secondary outlet of the plurality of secondary outlets. Each primary outlet and each secondary outlet may be fluidically connected to an outlet chamber that is fluidically connected to the exhaust. Each primary outlet may open into an associated primary outlet channel that opens into the outlet chamber. Each secondary outlet may be fluidically connected to an associated secondary outlet channel that opens into the outlet chamber and is separate from the plurality of primary outlet channels.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: December 8, 2020
    Inventors: Christoph Fiala, Michael Hoetger, Gunter Rzychon
  • Patent number: 10632829
    Abstract: The distributor phase shifter for a hydraulic pump motor (300) is provided for a hydraulic pump motor (1) which includes a pump motor housing (2) and a pump motor central rotor (3) to which an input-output distributor (43) presents an input-output angular collector of an internal conduit (44) and an input-output angular collector of an external conduit (89), which phase shifter includes a phase shift acting element (301) which is supported on the housing of the pump motor (2) in order to make the input-output distributor (43) rotate around its longitudinal axis and over a determined angular range.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: April 28, 2020
    Inventor: Vianney Rabhi
  • Patent number: 10539213
    Abstract: A cylinder block for use in an integrated drive generator has a shaft portion with a relatively small outer diameter and a cylindrical body portion having a larger outer diameter than the shaft portion, and said cylindrical body portion formed with a plurality of piston chambers, said cylindrical body portion extending from a first end to a second end, said second end being provided with cylindrical ports leading into said piston chambers and said cylindrical ports having a third end and a fourth end wherein a ratio of a first distance from said first end to said fourth end to a second distance from said first end to said second end being between 0.91 and 0.93. A generator and a method are also described.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: January 21, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Derek R. Hochstetler, Ted A. Martin, Duane C. Johnson, Glenn C. Lemmers, Jr.
  • Patent number: 9097113
    Abstract: A method of suppressing a pulsation of axial type hydraulic pump/motor includes performing a pressure accumulation operation in which each of ports of each of two pressure accumulation oil passages exclusively communicates with a corresponding one of communication holes and pressure inside one of the cylinder bores is accumulated in a corresponding one of the pressure accumulation oil passages through the communication hole in two levels, the communication holes being provided for each of the cylinder bores to communicate with inside of each of the cylinder bores and having opening portions sliding on the respective ports with rotation of the cylinder block to communicate with the respective ports; and performing an accumulated pressure collection operation in which the pressure accumulated in the pressure accumulation oil passage is collected in one of the cylinder bores in two levels.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: August 4, 2015
    Assignee: Komatsu Ltd.
    Inventors: Takahiro Miyata, Kazuhiro Maruta
  • Patent number: 8635939
    Abstract: An apparatus comprising: a series of units, each being capable of producing a volume flow; a first channel for supplying hydraulic fluid into the apparatus; a second channel for supplying hydraulic fluid from the apparatus; a first series of valves comprising at least one controlled valve for each unit; a third channel for supplying hydraulic fluid from the apparatus; and several controlled auxiliary valves, each being provided for one unit. The control circuit also comprises: at least one actuator for converting hydraulic energy to mechanical energy, wherein said actuator is at least connected to either the second channel or the third channel; and a control device configured to synchronize the operation of the valves of the first series of valves and said auxiliary valves with the operation of said units, and to control the actuator by means of pressure and volume flow.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: January 28, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Matti Linjama, Jyrki Tammisto, Kalevi Huhtala, Matti Vilenius
  • Patent number: 8047120
    Abstract: In a hydraulic piston pump, a cylinder port can communicate with a discharge port after a system pressure and a chamber pressure in a cylinder bore becomes in an equilibrium condition. A through hole opening to a surface on which a cylinder block slides in a valve plate is allowed to communicate with a side of one end surface of a balance valve, and the system pressure of a discharge port side is supplied to the other end surface of the balance valve. In the balance valve, a balance piston which slides by a pressure difference between the chamber pressure of the cylinder bore and the system pressure is accommodated. Before the cylinder port communicates with an oil guiding groove, the chamber pressure can be equilibrated to the system pressure by an activation of the balance piston.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: November 1, 2011
    Assignee: Komatsu Ltd.
    Inventors: Shigeru Shinohara, Mitsuru Arai
  • Patent number: 6575076
    Abstract: A hydraulic installation comprising a hydraulic motor for linearly or rotatively moving against a load, a first connection with a source of pressurized hydraulic fluid of mainly constant high pressure, a second connection with a source of pressurized hydraulic fluid of mainly constant low pressure, a hydraulic transformer for transforming a flow of hydraulic fluid of a first pressure into a flow of hydraulic fluid of a second pressure and connected to the first connection and the second connection and at least one connecting line connecting the hydraulic motor and the hydraulic transformer, the hydraulic transformer comprising a housing, a rotor freely rotatable in the housing, chambers in the rotor with means for changing the volume of the chambers between a minimum and a maximum value during a full rotation of the rotor and means for alternately connecting each chamber with the first connection, the second connection and the connecting line, and wherein the hydraulic motor and the hydraulic transformer are
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: June 10, 2003
    Assignee: Innas Free Piston B.V.
    Inventor: Peter A. J. Achten
  • Patent number: 6361285
    Abstract: An axial piston pump of the swash-plate variety having a rotating cylinder block and pistons movable in a longitudinal direction within bores formed in the block, and having a reversing capacitance for reducing pressure pulsations. For the further reduction of such pulsations, one or more channels, each having an associated discharge opening, are formed into a web of the valve plate of the pump to sequentially couple the reversing capacitance into fluid communication with the cylinder bores passing across the web.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: March 26, 2002
    Assignee: Parker Hannifin GmbH
    Inventor: Thomas Lehner
  • Patent number: 6196109
    Abstract: A hydraulic unit of the type including a cylinder block (19) rotatably disposed adjacent a valve plate (51;61) having inlet ports 41a, 41b, and 41c, and further having outlet ports 43a, 43b, and 43c. Disposed between the individual inlet and outlet ports are web portions, having nominal cross-sections and flow restrictions. In one embodiment (FIG. 3), there is a modified web portion (55) toward the trailing end of the outlet port, and in the other embodiment (FIG. 7), there is a modified web portion (65) toward the leading end of the outlet port. In either case, the web portion has its cross-section or flow restriction modified to move the resultant force on the swashplate (33) in a direction tending to reduce the moments on the swashplate, and therefore, reduce the operator effort required to move or maintain the control lever.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: March 6, 2001
    Assignee: Eaton Corporation
    Inventors: Steven J. Zumbusch, Benjamin M. Hoxie, Maynard W. Marts
  • Patent number: 6186748
    Abstract: An axial piston pump has a structure in which an opening of one of the piston chambers starts overlapping with an opening portion when a pressure of another piston chamber reaches a pressure of a discharge port, and an opening of one of the piston chambers starts overlapping with an opening when a pressure of another piston chamber reaches a pressure of a suction port.
    Type: Grant
    Filed: July 19, 1999
    Date of Patent: February 13, 2001
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Tokihiko Umeda, Sachio Kawabata, Kazuhide Matsuda, Ryuji Sakai