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1. 发明授权

EP4230875B1 CENTERING ELECTRO-HYDRAULIC LIFT-O-MATIC SYSTEM 有权
公开(公告)号：EP4230875B1
公开(公告)日：2024-07-24
申请号：EP22157533.5
申请日：2022-02-18
IPC分类号： F15B15/14 , F15B15/20 , F15B15/26 , F15B11/12 , F15B13/043 , A01B63/00 , F16K31/00 , F15B13/04
CPC分类号： F15B15/1476 , F15B15/1461 , F15B15/202 , F15B15/261 , F15B2211/705420130101 , F15B11/121 , F15B13/0402 , F15B13/0431 , A01B71/08 , F16K11/22

2. 发明授权

EP3282157B1 CONTROL VALVE AND FLUID PRESSURE CONTROL DEVICE WITH SAME 有权转让
公开(公告)号：EP3282157B1
公开(公告)日：2024-02-28
申请号：EP16776406.7
申请日：2016-03-23
发明人： MIYASHITA, Hideki , MATSUZAKI, Keiichi , KONDO, Hiroki
IPC分类号： F15B13/08 , F16K11/07 , F16K27/00 , F16K27/04 , F16K31/42 , F15B13/04 , F15B13/043

3. 发明公开

EP4276316A1 SERVOVALVE 审中-实审
公开(公告)号：EP4276316A1
公开(公告)日：2023-11-15
申请号：EP22461548.4
申请日：2022-05-12
申请人： Hamilton Sundstrand Corporation
发明人： KORCZYNSKI, Marcin , MOSCICKI, Adam
IPC分类号： F15B13/044 , F15B13/043 , F15B19/00 , F16K31/00 , F15B13/04
摘要： A servovalve comprising: a fluid transfer valve assembly comprising a housing (1) having channel (60) therethrough fluidly connecting a supply port (30), a return port (34) and a control port (32) formed in the housing ; and a moveable valve spool located within the channel and arranged to regulate flow of fluid between the supply port, the return port and the control port in response to a control signal; and a drive assembly configured to axially move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow; wherein the valve spool comprises a first spool part (40) and a second spool part (42) and the drive assembly comprises a piezoelectric actuator (50) positioned between the first and the second spool parts within the channel, the piezoelectric actuator comprising a first piezoelectric actuator element (51) having a first end (51a) around which the first spool part is mounted and a second piezoelectric actuator element (52) having a first end (52a) around which the second spool part is mounted, and each of the first and the second piezoelectric actuator elements having a second end (51b, 52b), the second ends of the first and second piezoelectric actuator elements being connected to each other, and wherein the control signal is applied to the piezoelectric actuator to cause extension or contraction of the first and second piezoelectric actuator elements according to the polarity of the signal applied to each of the elements, and to thus cause corresponding movement of the respective spool parts, the assembly comprising a first nozzle fluidly connecting the supply port and the channel (60) of the housing, and a second nozzle fluidly connecting the return port and the channel (60) of the housing, wherein expansion and contraction of the first and second piezoelectric actuator elements causes axial movement of the respective first and second spool parts relative to the first and second nozzles so as to cover or expose the respective nozzles..

4. 发明授权

EP3715644B1 SPOOL SERVO VALVE 有权
公开(公告)号：EP3715644B1
公开(公告)日：2023-11-08
申请号：EP19461524.1
申请日：2019-03-29
发明人： Bujewicz, Maciej , Korczy ski, Marcin
IPC分类号： F15B13/043 , F16K11/07

5. 发明授权

EP3885586B1 DRIVE DEVICE FOR HYDRAULIC CYLINDER IN WORK MACHINE 有权
公开(公告)号：EP3885586B1
公开(公告)日：2023-06-28
申请号：EP20748351.2
申请日：2020-01-15
发明人： UEDA, Koji
IPC分类号： F15B11/00 , E02F9/22 , F15B11/02 , F15B13/043

6. 发明授权

EP3660332B1 SERVO VALVE 有权
公开(公告)号：EP3660332B1
公开(公告)日：2023-05-17
申请号：EP18461632.4
申请日：2018-11-27
发明人： Korczynski, Marcin , Janiga, Wojciech
IPC分类号： F15B13/043 , F16K31/00 , F15B13/044 , F16K11/07

7. 发明授权

EP3536980B1 VALVE BODY FOR A SERVOVALVE 有权转让
公开(公告)号：EP3536980B1
公开(公告)日：2022-12-28
申请号：EP18461531.8
申请日：2018-03-08
发明人： Sawicki, Piotr , CIS, Marcin
IPC分类号： F15B13/043

8. 发明授权

EP3263913B1 SERVO-VALVE AND FLUIDIC DEVICE 有权
公开(公告)号：EP3263913B1
公开(公告)日：2021-11-10
申请号：EP17177983.8
申请日：2017-06-27
发明人： OHSHIO, Keitaroh , SHIBATA, Yu , ASADA, Satoshi
IPC分类号： F15B13/043

9. 发明授权

EP3597938B1 SERVOVALVE 有权转让
公开(公告)号：EP3597938B1
公开(公告)日：2021-09-22
申请号：EP18461586.2
申请日：2018-07-20
发明人： CIS, Marcin , Sawicki, Piotr
IPC分类号： F15B13/043 , F16K49/00 , F16K31/06 , F28F9/00 , F15B21/04

10. 发明公开

EP3875783A1 SERVO VALVE 有权
公开(公告)号：EP3875783A1
公开(公告)日：2021-09-08
申请号：EP20461517.3
申请日：2020-03-02
申请人： Hamilton Sundstrand Corporation
发明人： Jakiewicz, Zbigniew , KIECZYKOWSKI, Przemys aw
IPC分类号： F15B13/043
摘要： A servo valve comprising: a fluid transfer valve assembly (100) comprising a supply port (13) and a control port (P A , P B ); a moveable valve spool (2) arranged to regulate flow of fluid from the supply port to the control port in response to a control signal; and a drive means configured to axially move the valve spool relative to the fluid transfer assembly in response to the control signal to regulate the fluid flow; wherein the drive means comprises an elongate member (120) arranged to rotate in response to the control signal, the elongate member having a cam profile in the fluid flow path such as to vary the pressure acting on the ends of the spool as the cam profile rotates.

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