SAUER-DANFOSS APS. Patent applications |
Patent application number | Title | Published |
20130047600 | CHARGED HYDRAULIC SYSTEM - In open-circuit hydraulic systems ( | 02-28-2013 |
20120103444 | CONTROL DEVICE FOR A HYDROSTATIC STEERING MOTOR - A control device ( | 05-03-2012 |
20110253918 | VALVE ACTUATOR - The invention relates to a valve actuator ( | 10-20-2011 |
20110236244 | FLUID ROTARY MACHINE WITH A SENSOR ARRANGEMENT - The invention concerns a fluid rotary machine ( | 09-29-2011 |
20110236243 | FLUID ROTARY MACHINE - The invention concerns a fluid rotary machine ( | 09-29-2011 |
20110226342 | FLUID WORKING MACHINES AND METHODS - A fluid working machine comprises a controller ( | 09-22-2011 |
20110220230 | FLUID DISTRIBUTION VALVE - The invention relates to a fluid distribution valve ( | 09-15-2011 |
20110204267 | HYDRAULIC VALVE ARRANGEMENT - The invention concerns a hydraulic valve arrangement ( | 08-25-2011 |
20110048224 | HYDRAULIC PUMP OR HYDRAULIC MOTOR HAVING A ROTATION SPEED SENSOR - The invention relates to a hydraulic pump or hydraulic motor having an orbiting cardan shaft. The hydraulic pump or motor includes a housing having an end cover and a port plate. The cardan shaft is mounted in the housing and extends through the port plate. A rotation speed sensor is fixed to the port plate and includes a sensor probe obtaining its signal from the orbiting cardan shaft. A piston may be in contact with the cardan shaft and moving forward and back due to the orbital motion of the cardan shaft. The sensor probe then obtains its signal from the movement of the piston. | 03-03-2011 |
20100322791 | HYDRAULIC SYSTEM WITH SUPPLEMENT PUMP - If a hydraulic system has several modes of operation, in particular a mode with a high pressure demand (II) and a mode with a high fluid flow demand (II), the hydraulic fluid pump has to be built with an accordingly high fluid flow output. Such a pump is expensive. Therefore it is suggested, to provide two pumps. I.e. a controllable main pump ( | 12-23-2010 |
20100320024 | HYDRAULIC STEERING - The invention concerns a hydraulic steering ( | 12-23-2010 |
20100303657 | OPERATING METHOD FOR FLUID WORKING MACHINE - A fluid working machine ( | 12-02-2010 |
20100303638 | METHOD OF OPERATING A FLUID WORKING MACHINE - When the fluid flow output of a synthetically commutated hydraulic pump is adapted to a given fluid flow demand, pulsations in the fluid output flow of the synthetically commutated hydraulic pump can occur. To avoid such pressure pulsations, it is suggested, to use a set of pre-calculated actuation patterns for actuating the electrically commutated valves of the synthetically commutated hydraulic pump. | 12-02-2010 |
20100296948 | METHOD OF OPERATING A FLUID WORKING MACHINE - To improve the fluid output flow characteristics ( | 11-25-2010 |
20100175551 | PISTON RINGS - A piston ring ( | 07-15-2010 |
20100158735 | HYDRAULIC MACHINE - A hydraulic machine has a gear wheel ( | 06-24-2010 |
20100150761 | HYDRAULIC MACHINE - The invention relates to a hydraulic machine comprising a housing section with a housing, a commutation section and a gear wheel section, the gear wheel section comprising a gear wheel set with an internally toothed gear ring and an externally toothed gear wheel, which engage each other and form working chambers that are connected to at least one inlet connection and at least one outlet connection via the commutation section that comprises a rotary slide valve and a valve plate. It is endeavoured to provide such a hydraulic machine that requires only little space. For this purpose, a sealing is arranged between the rotary slide valve and the housing. | 06-17-2010 |
20100147060 | ROTATION ANGLE SENSOR, IN PARTICULAR STEERING ANGLE SENSOR FOR A STEERING UNIT - The invention concerns a rotation angle sensor, in particular a steering angle sensor ( | 06-17-2010 |
20100089687 | HYDRAULIC STEERING ARRANGEMENT - The invention concerns a hydraulic steering arrangement ( | 04-15-2010 |
20100044143 | HYDRAULIC STEERING - The invention concerns a hydraulic steering with a steering initiator, a steering unit with feedback properties, which can be activated by the steering initiator, the steering unit having a supply connection arrangement with a pressure connection (P) and a tank connection (T) and a working connection arrangement with two working connections (L, R), an auxiliary-force operated steering valve, which is located in parallel with the steering unit between the supply connection arrangement (P, T) and the working connection arrangement (L, R), and a feedback suppressing device, which is active, when the steering valve is active. It is endeavoured to find a simple manner of ensuring the priority of the steering initiator over the steering valve. For this purpose, the steering initiator interacts with an activation sensor, which deactivates the feedback suppressing device on an activation of the steering initiator. | 02-25-2010 |
20100044142 | HYDRAULIC STEERING - The invention concerns a hydraulic steering with a steering initiator, a steering unit with feedback properties, which can be activated by the steering initiator, the steering unit having a supply connection arrangement with a pressure connection (P) and a tank connection (T) and a working connection arrangement with two working connections (L, R), an auxiliary-force operated steering valve, which is located in parallel with the steering unit between the supply connection arrangement (P, T) and the working connection arrangement (L, R), and a feedback suppressing device, which is active, when the steering valve is active. It is endeavoured to find a simple manner of ensuring the priority of the steering initiator over the steering valve. For this purpose, the steering initiator interacts with an activation sensor, which deactivates the feedback suppressing device on an activation of the steering initiator. | 02-25-2010 |
20100028186 | HYDRAULIC MACHINE - A hydraulic machine is disclosed with an externally toothed gear wheel ( | 02-04-2010 |
20090166124 | STEERING SYSTEM - 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 centre zone comprising a centre set-point and set-points on opposite sides of the centre 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. | 07-02-2009 |
20090120086 | METHOD OF CONTROLLING A CYCLICALLY COMMUTATED HYDRAULIC PUMP - When employing synthetically commutated hydraulic pumps ( | 05-14-2009 |
20090114469 | HYDRAULIC STEERING - The invention concerns a hydraulic steering ( | 05-07-2009 |
20090113888 | CHARGED HYDRAULIC SYSTEM - In open-circuit hydraulic systems ( | 05-07-2009 |
20090048736 | STEER BY WIRE CONTROL SYSTEM - The invention provides a steering system for a vehicle, a ship etc. The steering system has a steering handle for the operator of the vehicle, a set of signal processors, a sensor which determines a position of the steered element of the vehicle, and a controller which moves the steered element. The steered element could e.g. be the front wheels of a car. The signal processors are adapted to determine an error between the desired position of the steered element and an actual position of the steered element. In order to make the steering system more fault tolerant, the error signal is amplified based on the speed by which the steering handle is moved, and an error in the sensor therefore becomes less critical. The invention further provides a steering method, a steering control unit and a vehicle provided with a steering system of the mentioned kind. | 02-19-2009 |
20090045017 | RAISING DRIVE AND METHOD FOR CONTROLLING A RAISING DRIVE - The invention concerns a method for controlling a raising drive, the raising process occurring by means of pressure activation of at least one lift cylinder and the lowering process occurring by means of relieving, and a control of the lowering speed occurring by means of a variable flow resistance. In order to achieve a load-independent lowering speed, the flow resistance is determined in dependence of at least one load signal. | 02-19-2009 |
20090033053 | METHOD OF CALIBRATING AND STEERING A VEHICLE PROVIDED WITH A POSITIONING SYSTEM - The invention provides a method of calibrating a steering system for a vehicle, e.g. an off-highway machinery, to allow automatic steering based on input from a position or tracking system, e.g. based on a Global Positioning System (GPS). At least two records, each comprising a position value and a curvature value are established. The position value represents a position of the steered element, e.g. a position of a steered wheel of the vehicle, and the curvature value could e.g. be expressed as a radius of a curve followed by the vehicle with that position of the steered element. The curvature value is determined by the positioning system during movement of the vehicle. Due to the records, it is easy to calibrate or recalibrate the system and the invention is therefore applicable e.g. in connection with manufacturing of vehicles in small batch numbers, e.g. for one of a kind production or for retrofitting of steering components to existing vehicles. The invention further provides a method of operating the vehicle and a steering system incorporating the above mentioned calibration method. | 02-05-2009 |
20090014074 | HYDRAULIC VALVE ARRANGEMENT - The invention concerns a hydraulic valve arrangement ( | 01-15-2009 |
20080245222 | HYDRAULIC VALVE ARRANGEMENT - The invention concerns a hydraulic valve arrangement ( | 10-09-2008 |
20080240966 | HYDRAULIC MACHINE - The invention concerns a hydraulic machine ( | 10-02-2008 |
20080236932 | ACTUATOR CONTROL SYSTEM - 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. | 10-02-2008 |
20080236931 | HYDRAULIC STEERING SYSTEM - The invention provides a steering system e.g. for a vehicle. The system comprises a system-pump, a steering actuator, a rotary valve, a rotary meter, and a motor. The system-pump is arranged to provide a flow of a fluid to the steering actuator via the rotary valve and via the rotary meter, and the motor is arranged to provide rotation of the rotary valve and the rotary meter. To handle an emergency situation if the system-pump fails, the motor is dimensioned to operate the rotary meter as a fail-operational pump for pumping a flow of the fluid to the steering actuator if the system-pump fails. | 10-02-2008 |
20080225002 | JOYSTICK WITH A SENSOR DEVICE - A joystick ( | 09-18-2008 |
20080224073 | HYDRAULIC VALVE ARRANGEMENT - The invention concerns a hydraulic valve arrangement ( | 09-18-2008 |
20080223456 | HYDRAULIC VALVE ARRANGEMENT - The invention concerns a hydraulic valve arrangement ( | 09-18-2008 |