Patents Assigned to Danfoss Power Solutions APS
  • Patent number: 10087957
    Abstract: A hydraulic system (1) is disclosed comprising a pressure source (2), at least a hydraulic consumer (12, 13), and a pressure booster (16) arranged between the pressure source (2) and the hydraulic consumer (12, 13), wherein inactivating means (17) are provided inactivating or activating said pressure booster (16), said pressure booster (16) and said inactivating means (17) being part of a booster module (11). The operational possibilities of such a hydraulic system (1) should be extended. To this end the booster module (11) is part of a valve block (3), said valve block (3) comprising said booster module (11) and at least one valve module (9, 10) controlling said hydraulic consumer (12, 13).
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 2, 2018
    Assignee: Danfoss Power Solutions ApS
    Inventor: Martin Raadkjaer Jorgensen
  • Patent number: 10066609
    Abstract: It is intended to provide a vehicle comprising a fluid working machine which can reduce wear of parts and be produced at low cost. The fluid working machine 11, 12 is provided with an eccentric cam 17, a piston 18A to 18F, a cylinder 19A to 19F, a drive rod 20A-20F having an engaging part 24 engaging with the piston and a contact part 25 contacting the eccentric cam 17, a holding member 34A to 34F surrounding the drive rod, a pressing member 40A to 40F for pressing up the holding member in a radially outward direction, and at least one holding ring 41 for holding the holding member from the outside.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: September 4, 2018
    Assignees: Artemis Intelligent Power Ltd., Danfoss Power Solutions Aps
    Inventors: Jack Lavender, Gordon Voller
  • Patent number: 10036409
    Abstract: A hydraulic system (1) is provided comprising a group of at least two valves (2a, 2b, 2c) connected to a bus (8), each of said valves (2a, 2b, 2c) comprising a primary memory (9a, 9b, 9c) for storing a set of parameters of the valve (2a, 2b, 2c). The service work of such a hydraulic system should be facilitated. To this end each valve (2a, 2b, 2c) comprises a secondary memory (10a, 10b, 10c) storing said set of parameters of a different valve (2b, 2c, 2a) of said group.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: July 31, 2018
    Assignee: Danfoss Power Solutions ApS
    Inventors: Henrik Hjorth, Erik Christensen
  • Patent number: 9950737
    Abstract: A hydraulic steering system (1) is described comprising a first steering circuit (2a) and a second steering circuit (2b), each of said steering circuits (2a, 2b) comprising a steering device (3a, 3b) and a steering motor (4a, 4b) connected to said steering device (3a, 3b), each of said steering devices (3a, 3b) comprising a supply port arrangement having a high pressure port (Pa, Pb) and a low pressure port (Ta, Tb), a working port arrangement having two working ports (La, Ra; Lb, Rb) connected to said steering motor (4a, 4b), a control valve (5a, 5b), and a measuring motor (6a, 6b). Such a steering system should have a comfortable steering behavior. To this end in each of said steering devices (3a, 3b) said measuring motor (6a, 6b) is arranged in a working line (19a, 20b) between said control valve (5a, 5b) and one of said working ports (La, Ra; Lb, Rb).
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: April 24, 2018
    Assignee: Danfoss Power Solutions ApS
    Inventors: Soeren Liljenberg, Tom Rudolph, Tom Tychsen, Jens Vester, Poul Ennemark
  • Patent number: 9926003
    Abstract: A hydraulic steering unit (3) is disclosed comprising a working port arrangement (L, R) having two working ports (L, R), a supply port arrangement having a high pressure port (P) and a low pressure port (T), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle (6), and a drain bleed (Ad) which is open in neutral position of said steering handle (6), said drain bleed (Ad) connecting a point (11) upstream said main bleed (A1) and said amplification bleed (Au) to said low pressure port (T).
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: March 27, 2018
    Assignee: Danfoss Power Solutions ApS
    Inventors: Bendt Porskrog, Casper Mikael Olesen, Abdul Karim Rahimzai
  • Patent number: 9902422
    Abstract: A hydraulic steering device is provided comprising a supply port arrangement having a supply port (P) and a return port (T), a working port arrangement having two working ports (L, R), direction valve means (2) arranged between said supply port arrangement and said working port arrangement, at least two fluid meters (3, 4), each of said fluid meters (3, 4) having a movable metering element (12, 15), said metering elements (12, 15) being connected by a shaft (5), said shaft (5) having an axis, selector valve means (6) being provided, said selector valve means (6) in a first position arranging said fluid meters (3, 4) hydraulically in parallel and in a second position shutting off one of said fluid meters (3, 4), said selector valve means (6) having a valve element (20) shiftable in an direction parallel to said axis. It is an object to reduce wear in said hydraulic steering device in a simple manner.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: February 27, 2018
    Assignee: Danfoss Power Solutions ApS
    Inventors: Nils E. Sevelsted, Morten Hoeck Petersen, Helle Bonde Rasmussen
  • Patent number: 9885374
    Abstract: A hydraulic system of a vehicle is provided, said system including: a first hydraulic circuit (1) having a first pressure source (2) and at least a first hydraulic consumer (3, 4), a second hydraulic circuit (5) having a second pressure source (6) and at least a second hydraulic consumer (7), connecting means (10, 11) allowing a flow of hydraulic fluid at least from said first hydraulic circuit (1) to said second hydraulic circuit (5), and control means (16) for controlling operation of said hydraulic consumers (3, 4, 7). Such a hydraulic system should allow safe operation of a vehicle with low energy consumption of the hydraulic system.
    Type: Grant
    Filed: October 6, 2015
    Date of Patent: February 6, 2018
    Assignee: Danfoss Power Solutions ApS
    Inventor: Carsten Christensen
  • Patent number: 9835179
    Abstract: A hydraulic valve arrangement (1) is provided comprising comprising a supply port arrangement having a high pressure port (2) and a low pressure port (4), a working port arrangement having two working ports (6, 7), a first valve (13) arranged between said high pressure port (2) and said working port arrangement (6, 7), a second valve (14) arranged between said low pressure port (4) and said working port arrangement (6, 7), a controller (19) for controlling said first valve (13) and said second valve (14), said controller (19) having an input connection (20) for receiving a signal of an operator input device, and a regenerative flow path which can be established by means of at least one of said first valve (13) and said second valve (14). The function of such a hydraulic valve arrangement should be enhanced. To this end said controller (19) said controller interrupts said regenerative flow path when a feed pressure at said working port arrangement (6, 7) exceeds a predetermined pressure level.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: December 5, 2017
    Assignee: Danfoss Power Solutions ApS
    Inventors: Frede Callesen, Dirk Wroblewski
  • Patent number: 9810329
    Abstract: A valve group includes an inlet module and at least one service module connected to the inlet module, the inlet module having a housing, a pressure port, a pressure gallery, a tank port, a tank gallery, a spool movable in the housing to interrupt in a first position a connection between the pressure port and the pressure gallery and to connect in a second position the pressure port and the pressure gallery. A first pressure transducer is provided to detect a first pressure in the pressure gallery and a second pressure transducer is provided to detect a second pressure in the tank gallery, the pressure transducers being connected to a controller determining the position of the spool based on the pressures read from the pressure transducers.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: November 7, 2017
    Assignee: Danfoss Power Solutions ApS
    Inventor: Frede Callesen
  • Patent number: 9809248
    Abstract: The invention provides a steering system comprising a controlled element which is movable in a neutral area comprising a neutral position and in areas on opposite sides of the neutral area based on a steering input and a handle for requesting a desired position for the controlled element. The handle is movable between set-points in a center zone comprising a center set-point and set-points on opposite sides of the center zone. Furthermore, a steering unit is arranged to receive set-points from the handle, to determine a corresponding controlled position of the controlled element, and to move the controlled element to said controlled position. In order to prevent or reduce jerks, the steering unit is adapted to vary a speed by which the controlled element is moved to the controlled position. The speed is variable in dependence of the received set-point.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: November 7, 2017
    Assignee: Danfoss Power Solutions ApS
    Inventors: Thomas Bauer, Soeren Moeller Hansen
  • Patent number: 9744990
    Abstract: A hydraulic steering system 1 is described comprising a steering unit and a priority valve, said steering unit comprising a working port arrangement having two working ports, a supply port arrangement having a high pressure port and a low pressure port, a load sensing port, a main flow path having a main bleed and a metering device and being arranged between said high pressure port and said working port arrangement, an amplification flow path having an amplification bleed and being arranged between said high pressure port and said working port arrangement, said main bleed and said amplification bleed being controlled together by means of a steering handle and being closed in neutral position of said steering handle, wherein said priority valve comprises a priority outlet connected to said high pressure port of said steering unit, a valve element moveable in a priority direction to connect an inlet of said priority valve to said priority outlet, and a load sensing connection connected to said load sensing port
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: August 29, 2017
    Assignee: Danfoss Power Solutions ApS
    Inventors: Bendt Porskrog, Casper Mikael Olesen, Abdul Karim Rahimzai
  • Patent number: 9739382
    Abstract: The invention relates to a fluid distribution valve (1, 25, 29, 37, 43), comprising at least a first fluid port (2), a second fluid port (3) and a third fluid port (4). These ports are connecting to a fluid distribution chamber (5). The second fluid port (3) can be selectively connected to the first fluid port (2) and/or the third fluid port (4) through said distribution chamber (5). The second fluid port (3) is arranged between the first fluid port (2) and the third fluid port (4).
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: August 22, 2017
    Assignees: Danfoss Power Solutions Aps, Artemis Intelligent Power Ltd.
    Inventors: Stephen Laird, Onno Kuttler, Luke Wadsley
  • Patent number: 9725113
    Abstract: A hydraulic steering system (1) is described comprising a steering unit (3) and a pressure source (4), said steering unit (3) comprising a working port arrangement (L, R) having two working ports, a supply port arrangement having a high pressure port (P) and a low pressure port (5), a main flow path (7) having a main bleed (A1) and a metering device (8) and being arranged between said high pressure port (P) and said working port arrangement (L, R), an amplification flow path (9) having an amplification bleed (Au) and being arranged between said high pressure port (P) and said working port arrangement (L, R), said main bleed (A1) and said amplification bleed (Au) being controlled together by means of a steering handle (6) and being closed in neutral position of said steering handle, and said pressure source (4) having a variable displacement.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: August 8, 2017
    Assignee: Danfoss Power Solutions ApS
    Inventors: Bendt Porskrog, Casper Mikael Olesen, Abdul Karim Rahimzai
  • Patent number: 9707998
    Abstract: A method for controlling steering of a vehicle (1) is provided, the vehicle (1) defining two or more steerable axes, and the vehicle (1) comprising a number of wheels (2), each of said wheels (2) being associated with one of said steerable axes in such a manner that steering of a given wheel (2) is obtained by steering the steerable axis associated therewith. The method comprises providing a first, a second and a third steering input. The first steering input defines a point of intersection between a virtual steering axis (4) and a longitudinal center axis defined by the vehicle (1). The second steering input defines an angle between the virtual steering axis (4) and the longitudinal center axis. The third steering input defines a position of a center of rotation (5) along the virtual steering axis (4).
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: July 18, 2017
    Assignee: Danfoss Power Solutions ApS
    Inventors: Poul Ennemark, Morten Hoeck Petersen
  • Patent number: 9616919
    Abstract: A hydraulic steering device is provided comprising a supply port arrangement having a pressure port (P) and a tank port (5), a working port arrangement having two working ports (L, R), a main flow path (14) between the pressure port (P) and the working port arrangement, a return flow path (16) between the working port arrangement and the tank port (5), flow meter means (15) being arranged in said main flow path (14), an amplification flow path (17) being arranged in parallel to said main flow path (14), said amplification flow path (17) being connected to said main flow path (14) downstream said flow meter means (15) in a direction from said pressure port (P) to said working port arrangement. A risk of dangerous situations in case of jamming of the flow meter should be reduced. To this end pressure increasing means are provided increasing a pressure over said flow meter means (15) in case a flow through said main flow path (14) is blocked by said flow meter (15).
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: April 11, 2017
    Assignee: Danfoss Power Solutions APS
    Inventors: Niels Arbjerg, Rene Andersen
  • Patent number: 9550521
    Abstract: A hydraulic steering arrangement (1) is provided comprising a static steering unit (2) and an adjustable pressure source (3) connected to a pressure port (4) of said steering unit (2) and having a load sensing port (21). Such a steering unit should enable a fast reaction of the steering unit. To this end said pressure source (3) is a dynamic pressure source having an orifice (Adyn) outputting hydraulic fluid to said load sensing port (21), a load sensing line (22) connecting said load sensing port (21) and a low pressure port (11), a control valve (24) being arranged in said load sensing line (22) between said load sensing port (21) and said low pressure port (11), said control valve (24) being actuated by a control pressure within said steering unit (2) and throttling a flow through said load sensing line (22) depending on said control pressure.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: January 24, 2017
    Assignee: Danfoss Power Solutions ApS
    Inventors: Rene Andersen, Niels Arbjerg, Abdul Karim Rahimzai
  • Patent number: 9500292
    Abstract: An electrohydraulic control valve comprising a valve element that is displaceable in a first direction by a pressure in a first pressure chamber and in a second direction by a pressure in a second pressure chamber. The first pressure chamber is connectable to a high pressure supply and a low pressure supply. The second pressure chamber is connectable to the high pressure supply and the low pressure supply. A first magnetic valve is connected to the first pressure chamber and a second magnetic valve is connected to the second pressure chamber. A third magnetic valve is connected to the high pressure supply and to the first magnetic valve and to the second magnetic valve. It is intended to provide an electrohydraulic control valve that is both reliable and less complex than previous valve arrangements. To this end the first magnetic valve and the second magnetic valve are three-way valves.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: November 22, 2016
    Assignee: DANFOSS POWER SOLUTIONS APS
    Inventor: Kjeld Ravn
  • Patent number: 9410544
    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 24, 2012
    Date of Patent: August 9, 2016
    Assignee: Danfoss Power Solutions ApS
    Inventors: Onno Kuttler, Luke Wadsley, Michael D. Gandrud, Pierre Joly
  • Patent number: 9403554
    Abstract: The invention concerns a rotation angle sensor, in particular a steering angle sensor (1) for a steering unit, with a housing (2) comprising an exterior (8), a pick-up sensor (7) arranged in a sensor chamber in the housing (2) to perform rotary movements around a rotation axis, and a stationary receiver interacting with the pick-up sensor (7). It is endeavored to make such steering angle sensors fit for rough environmental conditions. For this purpose, the sensor chamber is connected to the exterior (8) via at least one free space (16).
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: August 2, 2016
    Assignee: Danfoss Power Solutions ApS
    Inventors: Dennis Henning, John Kristensen, Soeren Moeller Hansen
  • Patent number: 9309877
    Abstract: Disclosed is a cylinder assembly for a fluid-working machine. The assembly includes a body having a first end and a second end. The body further includes a cylinder, a poppet valve seat and a face-sealing annular valve seat. The cylinder is open to the first end and configured to receive a reciprocating piston. The poppet and annular valve seats extend around an axis through the cylinder. An annular valve including the annular valve seat and an annular valve member extends around the cylinder. Thus, the cylinder assembly is compact.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: April 12, 2016
    Assignees: ARTEMIS INTELLIGENT POWER LIMITED, DANFOSS POWER SOLUTIONS APS
    Inventor: Uwe Stein