Patents Assigned to Danfoss Power Solutions APS
  • Patent number: 9261084
    Abstract: A hydraulic control arrangement (1) is described having a directional valve (2), a metering pump unit which has at least two metering pumps (3, 4) which are connected hydraulically in parallel and are operable mechanically in parallel, and a shut-off valve (6) in hydraulic connection between two of the at least two metering pumps (3, 4), a pump connection (P) and a tank connection (T) which are connected to said metering pump unit by way of the directional valve (2), and two working connections (L, R) connected to the directional valve (2), a control input (8) of the shut-off valve (6) being connected to the pump connection (P) by means of a control valve. Such a control arrangement should be operated at a high hydraulic pressure and at the same time it should be made sure that the shut-off valve is actuated only when the required high pressure is available.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: February 16, 2016
    Assignee: Danfoss Power Solutions ApS
    Inventors: Morten Hoeck Petersen, Bendt Porskrog, Nils E. Sevelsted
  • Patent number: 9242668
    Abstract: A hydraulic steering device (1) is described comprising a supply port arrangement having a supply port (P) and a tank port (T), a working port arrangement having two working ports (L, R), a main flow path (14) between the supply port (P) and the working port arrangement, a return flow path (16) between the working port arrangement and the tank port (T), flow meter means (15) being arranged in said main flow path (14), said flow meter means (15) comprising at least two flow meters (27, 28) and a flow meter valve means (30), said flow meter valve means (30) in a first operation mode connecting at least two flow meters (27, 28) in parallel and in a second operation mode making inactive at least one flow meter (27). Such a steering device should be operated comfortable for a driver.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: January 26, 2016
    Assignee: Danfoss Power Solutions APS
    Inventors: Poul Ennemark, Peter Gade Peistrup, Tom Rudolph
  • Patent number: 9188114
    Abstract: In open-circuit hydraulic systems (1), the cross-sections of the supply lines (6) and input valves of the hydraulic pump (3) have to be large, so that sufficient flow flux can be provided. This hinders a reduction of the size of the pump and the whole hydraulic system. It is suggested that the supply flow (7) of a hydraulic pump (3) is charged by a second, charging pump (2), to a mid-pressure level (7). The cross-sections of the supply flow areas can thus be decreased.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: November 17, 2015
    Assignee: Danfoss Power Solutions ApS
    Inventors: Onno Kuttler, Luke Wadsley, Michael D. Gandrud, Pierre Joly
  • Patent number: 9114831
    Abstract: The invention provides a method and a system for moving an element, e.g. a rudder of a ship or a wheel of a vehicle. The element is moved by a hydraulic fluid. According to the invention, an operator indicates a desired movement, and in accordance with the desired movement, at fluid is provided from at least three fluid providers each providing a share of the fluid in parallel streams and only considering the desired movement not the shares provided by the other fluid providers. The invention allows continuation of a steering task even if one fluid provider is disabled, and the invention allows the continuation even without having to notice that one provider is disabled. Accordingly, the invention provides an improvement and simplification relative to the known hydraulic steering systems.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: August 25, 2015
    Assignee: Danfoss Power Solutions ApS
    Inventors: Preben Albrecht, John Kristensen, Steve Crow, Kjeld Buus Jensen
  • Patent number: 9086050
    Abstract: The invention concerns a fluid rotary machine (1) with a housing (2), a shaft (3) projecting from the housing (2), and being rotatable around an axis (4) and forming part of a movement chain, and a sensor arrangement (10) comprising a transmitter (12) and a receiver (15). It is endeavored to find a simple solution for detecting the rotation of the shaft with a relatively high accuracy. For this purpose, a channel (21) is provided in the movement chain, and the transmitter (12) is connected to a transfer element (19) transferring a torque that is led through said channel (21) to a section of the movement chain that is farther away from the transmitter (12) than a transmitter-side end of the movement chain.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: July 21, 2015
    Assignee: Danfoss Power Solutions APS
    Inventor: Tom Tychsen
  • Patent number: 9022166
    Abstract: The invention concerns a hydraulic steering arrangement with a hydraulically actuated steering valve arrangement, steering motor connections (CL, CR), which are connected to supply connections (HP, T) via the steering valve arrangement, and a steering unit. It is endeavored to equalize in a simple manner the steering behavior in both directions. For this purpose, it is ensured that the steering valve arrangement has a directional valve and a flow control valve.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: May 5, 2015
    Assignee: Danfoss Power Solutions ApS
    Inventor: Ole Vincentz Soerensen
  • Patent number: 8905732
    Abstract: In usual hydraulic pumps, a separate assembly opening is provided for every valve of the hydraulic pump. This design causes sealing problems. It is proposed, that the fluid inlet valve and the fluid outlet valve can be assembled through a common assembly access port. Further, the fluid inlet valve and the fluid outlet valve can be arranged around a common cavity, or even within the same cavity, via the common assembly access port in the fluid working machine's body.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: December 9, 2014
    Assignee: Danfoss Power Solutions APS
    Inventors: Onno Kuttler, Uwe Stein
  • Patent number: 8893566
    Abstract: The invention concerns a fluid rotary machine (1) with a housing (2), a shaft (3) led out of the housing (2) and a sensor arrangement (10) comprising a transmitter (12) in active connection with the shaft (3), and a receiver (15). It is endeavored to arrange the sensor arrangement in an advantageous manner on the fluid rotary machine. For this purpose, the sensor arrangement (10) comprises an accommodation area, in which the transmitter (12) is arranged, the accommodation area being in fluid connection with the inside of the housing (2) and sealed towards the outside, and the receiver (15) is arranged outside the housing (2) and the accommodation area.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: November 25, 2014
    Assignee: Danfoss Power Solutions APS
    Inventors: Tom Tychsen, Dietmar Weiss
  • Patent number: D727904
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: April 28, 2015
    Assignee: Danfoss Power Solutions APS
    Inventor: Ena Jensen
  • Patent number: D728628
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: May 5, 2015
    Assignee: Danfoss Power Solutions ApS
    Inventors: Luke Wadesly, Alexis Dole, Uwe Stein, Stephen Laird
  • Patent number: D734335
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: July 14, 2015
    Assignee: Danfoss Power Solutions APS
    Inventor: Ena Jensen
  • Patent number: D734750
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: July 21, 2015
    Assignee: Danfoss Power Solutions APS
    Inventor: Ena Jensen
  • Patent number: D745008
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: December 8, 2015
    Assignee: Danfoss Power Solutions APS
    Inventor: Ena Jensen
  • Patent number: D745009
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: December 8, 2015
    Assignee: Danfoss Power Solutions APS
    Inventor: Ena Jensen