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公开(公告)号：US11629735B2
公开(公告)日：2023-04-18
申请号：US16774289
申请日：2020-01-28
发明人： Eric S. Engelmann , Conwell K. Rife, Jr. , Mark Holub , Clayton Padgett , Matthew J. Sirovatka , Paul Friend
IPC分类号： F15B15/28 , E01C23/088
摘要： A milling machine may have a frame, a milling drum attached to the frame, and ground engaging tracks that support the frame and propel the milling machine in a forward or rearward direction. The milling machine may have a tank that stores hydraulic fluid. The milling machine may also have at least one actuator connecting the frame to the tracks. The actuator may adjust a height of the frame relative to a ground surface. A fluid conduit may connect the tank to the actuator. The milling machine may have a flow sensor in the fluid conduit. The flow sensor may determine a flow parameter associated with a flow of the hydraulic fluid into or out of the actuator. The milling machine may also have a controller that determines a height of the frame relative to the ground surface based on the flow parameter.
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公开(公告)号：US20220373001A1
公开(公告)日：2022-11-24
申请号：US17771560
申请日：2020-07-20
申请人： SMC CORPORATION
发明人： Hideki UCHIYAMA , Kenji SUDA , Makoto SAITO
摘要： A first MR sensor and a second MR sensor are a combination of a first magnetic resistance effect element pattern and a second magnetic resistance effect element pattern. The first MR sensor and the second MR sensor are disposed a prescribed distance apart such that, when the first MR sensor receives the greatest quantity of the magnetic field component of a magnet oriented parallel to the axial direction of a piston, the second MR sensor receives the greatest quantity of the magnetic field component of a magnet oriented parallel to the radial direction of the piston.
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公开(公告)号：US20220154736A1
公开(公告)日：2022-05-19
申请号：US17588197
申请日：2022-01-28
发明人： William J. Boyko , Josef Griesmer
IPC分类号： F15B3/00 , F15B11/046 , F15B11/02 , F15B15/28
摘要： Devices, systems, and methods for detecting properties of motion of at least one component of fluid exchange devices, such as, for example, a pressure exchange device or system.
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公开(公告)号：US11275167B2
公开(公告)日：2022-03-15
申请号：US16594448
申请日：2019-10-07
申请人： Astyx MPS GmbH
发明人： Andre Giere , Sebastian Lüttich
摘要： The invention relates to a distance-measuring device for determining a distance between a reflection body in a conducting structure and a coupling region for electromagnetic waves, which region is provided on an end section of the conducting structure, said measuring device comprising a transmitting and receiving device, and a conduction junction (1) provided on the coupling region, for coupling the transmitting and receiving device to the conducting structure containing a medium, in order to couple an electromagnetic wave into the conducting structure, and to decouple the electromagnetic wave, reflected on the reflection body, from the conducting structure. Said measuring device also comprises an evaluation device for determining the distance between the coupling region and the reflection body from the complex reflection coefficient between the coupled electromagnetic wave and the decoupled electromagnetic wave. The invention also relates to the corresponding method.
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公开(公告)号：US11215204B2
公开(公告)日：2022-01-04
申请号：US16644049
申请日：2018-07-06
申请人： SMC CORPORATION
发明人： Ken Tamura
摘要： A piston unit is provided with a piston body; a packing mounted on an outer circumferential portion of the piston body; a holding member having a plurality of magnet holding portions that are arranged along a circumferential direction; a plurality of magnets which are held at intervals in the circumferential direction; a first annular yoke disposed on one side in an axial direction of the plurality of magnets; and a second annular yoke disposed on the other side in the axial direction of the plurality of magnets.
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公开(公告)号：US20210340730A1
公开(公告)日：2021-11-04
申请号：US17273440
申请日：2019-12-13
发明人： Kazuhiro OOUCHI
摘要： A wheeled work vehicle includes: a transmission transmitting the rotational power of a traveling hydraulic motor to wheels; a traveling control valve having an interruption position that interrupts supply of hydraulic fluid from a hydraulic pump to the traveling hydraulic motor; a shift changeover valve that shifts the speed stage of the transmission by the position of the shift changeover valve being selectively switched; and a controller that controls the traveling control valve and the shift changeover valve. The controller switches the traveling control valve to the interruption position, then switches the position of the shift changeover valve such that the speed stage of the transmission is shifted to the low speed stage, and switches the traveling control valve from the interruption position to an original position side before the switching in a case where the controller shifts the transmission from the high speed stage to the low speed stage.
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公开(公告)号：US11149764B2
公开(公告)日：2021-10-19
申请号：US16630897
申请日：2018-07-03
IPC分类号： F15B15/28
摘要： The invention relates to a hydraulic cylinder comprising a body (1) having a wall (3) that defines a cylindrical cavity (2), with a cylindrical cavity axis (X), in which a piston (4) is movably mounted, said piston (4) separating said cylindrical cavity (2) into two tight chambers (5, 6) that are isolated from each other, the wall (3) of the body comprising at least two passages (7, 8) for introducing or discharging a fluid into each of said two chambers (5, 6). The cylinder also comprises two end walls (17, 18) and a rigid rod (32) which is secured to the piston (4) and coaxial with the cylindrical cavity (2), said rod (32) passing through a passage opening (20) provided in one of the two end walls (17, 18). The cylinder is characterised in that it comprises a position sensor (38) comprising a sensor head (39), a sensor rod (40) which is secured to the sensor head (39) and around which a magnet (41) is fitted, and a connector (42) connected to said sensor head (39).
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公开(公告)号：US11137000B2
公开(公告)日：2021-10-05
申请号：US14511463
申请日：2014-10-10
申请人： MEA Inc.
发明人： Mark Vincent Chester
摘要： The self-contained energy efficient hydraulic actuator system of the present invention includes a hydraulic cylinder, a servo motor that is configured to produce rated torque from zero RPM to maximum rated RPM with rotor speed/position feedback to a servo motor, a pump, and a solenoid valve that enables the hydraulic cylinder to maintain its position without the motor running. The system has the ability to hold a load in place without motor operation via the use of the solenoid valve, and therefore saves energy and extends the motor lifetime by minimizing the motor running time.
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公开(公告)号：US20210239142A1
公开(公告)日：2021-08-05
申请号：US17171698
申请日：2021-02-09
申请人： Twin Disc, Inc.
发明人： Ryan J. Malloy
摘要： A power transmission device with a clutch plate wear sensor system includes a power transmission shaft configured to transmit torque and a clutch configured to selectively deliver power into or out of the power transmission shaft. The clutch includes a clutch stack and clutch piston that moves to selectively actuate the clutch stack between an engaged state to deliver power through the clutch and a disengaged state to not deliver power through the clutch. The clutch stack wear sensor system includes at least one detectable element arranged for movement in unison with the clutch piston and a sensor arranged to detect the detectable element and provide a signal indicative of a wear characteristic of the clutch stack.
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公开(公告)号：US20210231139A1
公开(公告)日：2021-07-29
申请号：US16774289
申请日：2020-01-28
发明人： Eric S. ENGELMANN , Conwell K. RIFE, JR. , Mark HOLUB , Clayton PADGETT , Matthew J. SIROVATKA , Paul FRIEND
IPC分类号： F15B15/28 , E01C23/088
摘要： A milling machine may have a frame, a milling drum attached to the frame, and ground engaging tracks that support the frame and propel the milling machine in a forward or rearward direction. The milling machine may have a tank that stores hydraulic fluid. The milling machine may also have at least one actuator connecting the frame to the tracks. The actuator may adjust a height of the frame relative to a ground surface. A fluid conduit may connect the tank to the actuator. The milling machine may have a flow sensor in the fluid conduit. The flow sensor may determine a flow parameter associated with a flow of the hydraulic fluid into or out of the actuator. The milling machine may also have a controller that determines a height of the frame relative to the ground surface based on the flow parameter.
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