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41. 发明申请

US20210164501A1 HYDRAULIC AXIAL PISTON UNIT AND METHOD FOR CONTROLLING OF A HYDRAULIC AXIAL PISTON UNIT 有权
公开(公告)号：US20210164501A1
公开(公告)日：2021-06-03
申请号：US16700407
申请日：2019-12-02
申请人： Danfoss Power Solutions Inc.
发明人： Jaromir Tvaruzek , Samuel Hall , Phil Evans , Dennis Greene
IPC分类号： F15B21/00
摘要： Hydraulic axial piston unit having a rotational group for driving or being driven by a driving shaft, and a tiltable displacement element for adjusting the displacement volume of the rotational group. The rotational group includes a rotatable cylinder block in which working pistons are mounted reciprocally moveable in cylinder bores for conveying hydraulic fluid from a kidney-shaped inlet port to a kidney-shaped outlet port on a valve segment. At least two control ports are located on the valve segment each between the respective circumferential ends of the kidney-shaped inlet port and the outlet port. The control ports can be brought sequentially in fluid connection with the cylinder bores when the cylinder block is rotating. At least one hydraulic fluid injector is connected fluidly to one control port, for sequentially injecting pressurized hydraulic fluid via the control port into the passing cylinder bores. Via the other control port hydraulic fluid can be drained from passing cylinder bores.

42. 发明申请

US20210040944A1 ELECTRIC DISPLACEMENT CONTROL FOR AN OPEN CIRCUIT VARIABLE DISPLACEMENT PUMP 有权
公开(公告)号：US20210040944A1
公开(公告)日：2021-02-11
申请号：US16866714
申请日：2020-05-05
申请人： DANFOSS POWER SOLUTIONS INC.
发明人： Stanislav Smolka
IPC分类号： F04B49/00 , F04B17/00 , F04B49/22
摘要： An electric displacement control system has a hydraulic variable displacement pump that operates in an open hydraulic circuit. A servo piston is disposed within a servo bore that is connected to the hydraulic variable displacement pump. Located in the servo bore is a control spool valve having an orifice that vents fluid pressure from the servo bore to a pump case. The flow rate of the system depends upon a fluid force between a feedback spring on a first side of the control spool valve and a solenoid actuator force on a second side of the control spool valve.

43. 发明授权

US10696327B2 Electronic pressure limiting for dual path systems 有权
公开(公告)号：US10696327B2
公开(公告)日：2020-06-30
申请号：US16171531
申请日：2018-10-26
申请人： DANFOSS POWER SOLUTIONS INC.
发明人： Brian E. Spranger , Caleb Van De Stroet
IPC分类号： B62D11/00 , F16H61/431 , F16H61/438
摘要： A pressure limiting system for a dual path machine wherein an input propel command from a propel device is scaled based upon the largest detected pressure in a hydraulic system to determine a modified propel command. Also, response time is adjusted within an electrical control system based upon the type of input propel command signal received.

44. 发明授权

US10604179B2 Machine stability control system 有权
公开(公告)号：US10604179B2
公开(公告)日：2020-03-31
申请号：US15493260
申请日：2017-04-21
申请人： Danfoss Power Solutions, Inc.
发明人： Brian Spranger
IPC分类号： B62D6/04 , G01C21/18
摘要： According to the present disclosure, a system and method for providing stability control to a machine includes generating a yaw signal at a gyroscope disposed on the machine and receiving the yaw signal at a controller in communication with the gyroscope. The controller is also in communication with a user input that generates control signals for driving at least one plant of the machine. The controller is configured to alter the control signals provided to the at least one plant from the user input based at least in part on the yaw signal.

45. 发明授权

US10550933B2 Hydraulic system for maintaining minimum low side pressure of closed circuit hydraulic system 有权
公开(公告)号：US10550933B2
公开(公告)日：2020-02-04
申请号：US15946880
申请日：2018-04-06
申请人： DANFOSS POWER SOLUTIONS INC.
发明人： Christian S. Daley , Nicholas Creager , Matt Dorenkamp , Eric R. Jacobson
IPC分类号： F16H61/4026 , F16H61/4052 , F16H61/4104 , F16H61/4139 , F04B49/00
摘要： A hydraulic system that has a hydraulic pump connected to and in communication with a hydraulic motor, at least one hydraulic cylinder, or both by a first conduit and a second conduit (i.e., a high side and a low side). The hydraulic system has a bypass valve connected to and in communication with the first conduit and the second conduit. The bypass valve has a preset pressure that is above a minimum low side pressure. When a shock load occurs in the hydraulic system and a related drop in pressure on the low side occurs, the bypass valve opens when the preset pressure is passed thereby preventing the pressure from dropping to the minimum low side pressure. The hydraulic system thereby avoids a low loop event that could cause damage to the hydraulic system without the presence of larger charge pumps or accumulators.

46. 发明授权

US10393261B2 High ambient temperature propulsion speed control of a self-propelled agricultural product applicator 有权
公开(公告)号：US10393261B2
公开(公告)日：2019-08-27
申请号：US15833089
申请日：2017-12-06
申请人： CNH Industrial America LLC , Danfoss Power Solutions Inc.
发明人： David J. Hafvenstein , Simon L. Nielsen
IPC分类号： F16H61/42 , F16H39/02 , F16H61/47 , A01C23/00 , F16H59/72 , A01M21/04
摘要： A system, apparatus and method are provided for limiting operating speed at high temperatures of a self-propelled, agricultural product applicator having a hydraulic drive system including a pump supplying pressurized hydraulic fluid to a variable-displacement hydraulic motor operatively connected for propelling the applicator. A temperature sensor detects a temperature of the pressurized hydraulic fluid in the hydraulic system. A propel controller is operatively connected between the temperature sensor and the propulsion motor and configured for limiting displacement of the propulsion motor according to one or more predetermined de-rated conditions resulting in reduced motor speed, in accordance with a predetermined schedule, when predetermined motor de-rating activation temperature limits of the hydraulic fluid are detected by the temperature sensor. The controller is further configured for providing a de-rated condition warning signal prior to limiting displacement of the propulsion motor.

47. 发明申请

US20140301882A1 SELECTABLE FLOW HYDRAULIC GEAR PUMP 有权
标题翻译：可选流量液压齿轮泵
公开(公告)号：US20140301882A1
公开(公告)日：2014-10-09
申请号：US14195226
申请日：2014-03-03
申请人： Danfoss Power Solutions Inc.
发明人： Wallace K. Snead , Thomas G. Modica , Alfred J. Permann
IPC分类号： F04C18/08
CPC分类号： F04C2/14 , F04B49/03 , F04C11/001 , F04C14/02 , F04C14/24 , F04C15/0057 , F04C15/06
摘要： A selective flow hydraulic gear pump has an integral unit with a front pump section and a rear pump section. The front pump section has a pumping gear set, gear plate, and bearing plate housing. The rear pump section has a pumping gear set, gear plate, and cover housing. The integral unit has an inlet port common to both the bearing plate housing and the cover housing. Check valves and solenoid operated control valves are contained within the bearing plate housing and the cover housing and are associated with a first fluid conduit. A second fluid conduit is in communication with and extends between the bearing plate housing an outlet port in the cover housing.
摘要翻译：选择性液压齿轮泵具有与前泵部分和后泵部分一体的单元。前泵部分有一个泵送齿轮组，齿轮板和轴承板壳体。后泵部分具有泵送齿轮组，齿轮板和盖壳体。整体单元具有与轴承板壳体和盖壳体共同的入口端口。止回阀和电磁操作控制阀包含在轴承板壳体和盖壳体内，并与第一流体导管相关联。第二流体导管与容纳盖壳体中的出口的支承板连通并在其之间延伸。

48. 发明授权

US3094957A Brazing jig for electron tube fabrication 失效
公开(公告)号：US3094957A
公开(公告)日：1963-06-25
申请号：US83935859
申请日：1959-09-11
申请人： RCA CORP
发明人： KNAUF JR HARRY V
IPC分类号： C04B37/02 , H01J19/46
CPC分类号： C04B37/026 , C04B2237/122 , C04B2237/124 , C04B2237/32 , C04B2237/403 , C04B2237/405 , C04B2237/62 , C04B2237/64 , C04B2237/765 , C04B2237/78 , C04B2237/84 , H01J19/46 , H01J2893/0006

49. 发明公开

US20230417253A1 FAN DRIVE SYSTEM 审中-公开
公开(公告)号：US20230417253A1
公开(公告)日：2023-12-28
申请号：US18250264
申请日：2021-12-20
申请人： Danfoss Power Solutions Inc.
发明人： Elias NIELSEN
IPC分类号： F04D27/00 , F04D25/04
CPC分类号： F04D27/004 , F04D25/04
摘要： The fan system includes a fan operated by a hydraulic motor which is driven by a hydraulic variable displacement pump that includes a displacement volume adjusting element. A tilt angle of the displacement volume adjusting element can be adjusted by controlling a tilt current supplied to an electronic displacement control unit. The hydraulic fan system further includes means for determining the volumetric flow rate of the pump and a control unit having: a signal connection to the means for determining the volumetric flow rate of the pump, a signal connection to a fan speed setting device, and a fan speed calculating unit for calculating a fan speed from the determined volumetric flow rate, a fan speed error determining unit for determining a fan speed error by comparing the calculated fan speed to the fan speed set by the fan speed setting device. The control unit can supply an adapted tilt current to the electronic displacement control unit in order to adjust the tilt angle of the displacement volume adjusting device, such that the volumetric flow rate can be adapted in order to reduce the fan speed error, wherein an ideal tilt current value is derived from the calculated fan speed and safety actions are performed in order to prevent damage to the fan, if the difference between the ideal tilt current value and the adapted tilt current is higher than a tilt current threshold value.

50. 发明公开

US20230174353A1 LIFTING MECHANISM 审中-公开
公开(公告)号：US20230174353A1
公开(公告)日：2023-06-08
申请号：US17887736
申请日：2022-08-15
申请人： Danfoss Power Solutions (Jiangsu) Co., Ltd. , Danfoss Power Solutions Inc.
发明人： Zhekang DU , Xiaozhong CHEN
IPC分类号： B66F3/32 , F15B13/02 , F15B15/18 , F15B13/06 , F15B11/04
CPC分类号： B66F3/32 , F15B13/02 , F15B15/18 , F15B13/06 , F15B11/04 , F15B2211/40
摘要： The lifting mechanism includes a battery, an electric machine, a hydraulic pump, an oil tank, a hydraulic cylinder, a work platform and a proportional valve or switch valve. In the energy-regeneration mode, the hydraulic fluid drives the hydraulic pump to operate as a hydraulic motor, thus in turn driving the electric machine to operate as a generator and charge the battery. In the present application, the hydraulic pump operates to increase a pressure in a hydraulic line between the hydraulic pump and the proportional valve or switch valve before the proportional valve or switch valve is switched from a unidirectional communication position to a bidirectional communication position. When the proportional valve or switch valve is switched from the unidirectional communication position to the bidirectional communication position, by increasing the pressure in the hydraulic line, it could be avoided that the volume of hydraulic fluid has low pressure is compressed because the hydraulic fluid has low pressure is communicated with hydraulic fluid has high pressure; therefore a state of sudden drop of the work platform is avoided, and safety performance and operating experience of the lifting mechanism is improved.

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