Patents Assigned to Danfoss Power Solutions APS
-
Patent number: 9616919Abstract: 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: GrantFiled: December 10, 2012Date of Patent: April 11, 2017Assignee: Danfoss Power Solutions APSInventors: Niels Arbjerg, Rene Andersen
-
Patent number: 9550521Abstract: 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: GrantFiled: March 11, 2014Date of Patent: January 24, 2017Assignee: Danfoss Power Solutions ApSInventors: Rene Andersen, Niels Arbjerg, Abdul Karim Rahimzai
-
Patent number: 9410544Abstract: 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: GrantFiled: October 24, 2012Date of Patent: August 9, 2016Assignee: Danfoss Power Solutions ApSInventors: Onno Kuttler, Luke Wadsley, Michael D. Gandrud, Pierre Joly
-
Patent number: 9403554Abstract: 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: GrantFiled: December 14, 2009Date of Patent: August 2, 2016Assignee: Danfoss Power Solutions ApSInventors: Dennis Henning, John Kristensen, Soeren Moeller Hansen
-
Patent number: 9261084Abstract: 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: GrantFiled: January 10, 2014Date of Patent: February 16, 2016Assignee: Danfoss Power Solutions ApSInventors: Morten Hoeck Petersen, Bendt Porskrog, Nils E. Sevelsted
-
Patent number: 9242668Abstract: 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: GrantFiled: December 10, 2012Date of Patent: January 26, 2016Assignee: Danfoss Power Solutions APSInventors: Poul Ennemark, Peter Gade Peistrup, Tom Rudolph
-
Patent number: 9188114Abstract: 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: GrantFiled: October 30, 2008Date of Patent: November 17, 2015Assignee: Danfoss Power Solutions ApSInventors: Onno Kuttler, Luke Wadsley, Michael D. Gandrud, Pierre Joly
-
Patent number: 9114831Abstract: 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: GrantFiled: December 14, 2007Date of Patent: August 25, 2015Assignee: Danfoss Power Solutions ApSInventors: Preben Albrecht, John Kristensen, Steve Crow, Kjeld Buus Jensen
-
Patent number: 9086050Abstract: 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: GrantFiled: March 24, 2011Date of Patent: July 21, 2015Assignee: Danfoss Power Solutions APSInventor: Tom Tychsen
-
Patent number: 9022166Abstract: 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: GrantFiled: July 18, 2006Date of Patent: May 5, 2015Assignee: Danfoss Power Solutions ApSInventor: Ole Vincentz Soerensen
-
Patent number: 8905732Abstract: 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: GrantFiled: October 29, 2008Date of Patent: December 9, 2014Assignee: Danfoss Power Solutions APSInventors: Onno Kuttler, Uwe Stein
-
Patent number: 8893566Abstract: 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: GrantFiled: March 24, 2011Date of Patent: November 25, 2014Assignee: Danfoss Power Solutions APSInventors: Tom Tychsen, Dietmar Weiss
-
Patent number: D727904Type: GrantFiled: June 20, 2013Date of Patent: April 28, 2015Assignee: Danfoss Power Solutions APSInventor: Ena Jensen
-
Patent number: D728628Type: GrantFiled: January 29, 2014Date of Patent: May 5, 2015Assignee: Danfoss Power Solutions ApSInventors: Luke Wadesly, Alexis Dole, Uwe Stein, Stephen Laird
-
Patent number: D734335Type: GrantFiled: February 5, 2015Date of Patent: July 14, 2015Assignee: Danfoss Power Solutions APSInventor: Ena Jensen
-
Patent number: D734750Type: GrantFiled: February 5, 2015Date of Patent: July 21, 2015Assignee: Danfoss Power Solutions APSInventor: Ena Jensen
-
Patent number: D745008Type: GrantFiled: February 5, 2015Date of Patent: December 8, 2015Assignee: Danfoss Power Solutions APSInventor: Ena Jensen
-
Patent number: D745009Type: GrantFiled: February 5, 2015Date of Patent: December 8, 2015Assignee: Danfoss Power Solutions APSInventor: Ena Jensen