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1. 发明公开

EP4435272A1 OPEN CENTRE HYDRAULIC DISTRIBUTOR AND POWER TRANSMISSION SYSTEM FOR TRANSMITTING TO USERS OF AN OPERATING MACHINE 审中-公开
公开(公告)号：EP4435272A1
公开(公告)日：2024-09-25
申请号：EP24162490.7
申请日：2024-03-08
申请人： Bucher Hydraulics S.p.A.
发明人： RIVA, Massimo
IPC分类号： F15B11/16 , F15B11/05 , E02F9/22
CPC分类号： F15B2211/2054620130101 , F15B2211/311620130101 , F15B2211/4520130101 , F15B11/16 , F15B2211/305520130101 , F15B2211/7120130101 , F15B11/055 , E02F9/2282 , E02F9/2296 , E02F9/2235 , F15B2211/2053820130101 , F15B2211/2051520130101 , F15B2211/665120130101 , F15B2211/630620130101 , F15B2211/665220130101
摘要： Open centre hydraulic distributor (10) of a fluid, comprising:
- a free circulation line (L2) that connects a supply line (L1) for supplying a fluid from a pump (P) of the negative control type to at least one discharge (T1, T2);
- a delivery line (L3) that connects the supply line (L1) to one or more users (A1, B1, A2, B2) downstream of the distributor (10);
- at least one directional valve (SV1, SV2) that intercepts the free circulation line (L2) and the delivery line (L3), and configurable in a first and a second position so that the movement from the first to the second position narrows a transit area of the free circulation line (L2) and opens a transit area of the delivery line (L3);
- a slide valve (1) arranged on the free circulation line (L2) downstream of the directional valve (SV1, SV2);
- a valve device (2) that is activated when a threshold value given by a pressure delta between upstream and downstream of the directional valve (SV1, SV2) is reached on the free circulation line (L1), and maintains this pressure delta equal to the threshold value;
- a negative control line (L4) to pick up a pressure signal from the free circulation line (L2) in a position downstream of said at least one direction valve (SV1, SV2) and upstream of the slide valve (1).

2. 发明公开

EP4428376A1 DESCENT CONTROL DEVICE FOR A HYDRAULIC CYLINDER, IN PARTICULAR FOR CONTROLLING THE DESCENT OF AN OPERATING ARM 审中-公开
公开(公告)号：EP4428376A1
公开(公告)日：2024-09-11
申请号：EP24161941.0
申请日：2024-03-07
申请人： Valvole Italia S.r.l.
发明人： PAOLILLO, Alfredo , BERTANI, Marcello , STORCI, Andrea
IPC分类号： F15B11/00 , F15B11/024 , F15B11/044 , F15B11/05 , F15B20/00
CPC分类号： F15B20/008 , F15B2211/863620130101 , F15B2211/4056120130101 , F15B11/05 , F15B2211/46520130101 , F15B2211/4620130101 , F15B11/044 , F15B2211/7520130101 , F15B2211/4152720130101 , F15B11/003 , F15B2211/3051520130101 , F15B2211/5055420130101 , F15B2211/52820130101 , F15B2211/515920130101 , F15B2211/515320130101 , F15B2211/51320130101 , F15B2211/3155820130101 , F15B2211/4158120130101 , F15B2211/32720130101 , F15B2211/42620130101 , F15B2211/32920130101 , F15B2211/42820130101 , F15B2211/41320130101 , F15B2211/5054520130101 , F15B2211/63520130101 , F15B2211/311120130101 , F15B2211/4058420130101 , F15B2211/47320130101 , F15B11/024 , F15B2211/305820130101 , F15B2211/4059220130101 , F15B11/0445 , F15B2211/5058120130101 , F15B2211/3050520130101
摘要： Descent control device for a hydraulic cylinder, comprising:
a first conduit (2), connectable to a first chamber (C1) of a cylinder (C);
a second conduit (3), connectable to a second chamber (C2) of the cylinder (C);
a control valve (4), arranged along the first conduit (2) and movable between a closed configuration and an open configuration;
a compensating valve (6), arranged along the first conduit (2) upstream of the control valve (4) with respect to the flow coming from the first chamber (C1);
wherein the compensating valve (6) comprises a control chamber (6a) and a chamber (6b);
a first driving conduit (61), connected to the first conduit (2), in a section downstream of the compensating valve (6) and upstream of the control valve (4) with respect to the flow coming from the first chamber (C1), and connected to the control chamber (6a).

3. 发明授权

EP4080063B1 HYDRAULIC DISTRIBUTOR WITH PRESSURE COMPENSATOR FOR DIRECTIONAL VALVES 有权
公开(公告)号：EP4080063B1
公开(公告)日：2024-09-04
申请号：EP22168876.5
申请日：2022-04-19
IPC分类号： F15B11/05 , F15B11/16 , F15B13/02 , F15B13/04 , F15B21/14 , F15B11/024
CPC分类号： F15B2211/2054620130101 , F15B11/05 , F15B11/163 , F15B13/026 , F15B13/0417 , F15B21/14 , F15B2211/305520130101 , F15B2211/3055520130101 , F15B11/024 , F15B2211/62520130101

4. 发明授权

EP3978765B1 FLUID PRESSURE ACTUATOR 有权转让
公开(公告)号：EP3978765B1
公开(公告)日：2024-05-01
申请号：EP20199455.5
申请日：2020-09-30
IPC分类号： F15B11/05 , F15B15/08 , F15B15/14 , F15B15/20 , F15B15/22 , F15B9/09
CPC分类号： F15B15/225 , F15B2015/149520130101 , F15B20/002 , F15B20/004 , F15B9/09 , F15B15/22

5. 发明公开

EP4083337A1 WORKING MACHINE 审中-实审
公开(公告)号：EP4083337A1
公开(公告)日：2022-11-02
申请号：EP20906822.0
申请日：2020-12-24
申请人： KUBOTA CORPORATION
发明人： HORII, Hiroshi
IPC分类号： E02F9/22 , F15B11/00 , F15B11/028 , F15B11/042 , F15B11/05 , F15B11/08
摘要： To suppress a variation in the actuation speed of a low-load hydraulic actuator (MT) whose hydraulic pressure required for actuation thereof is low. A working machine (1) includes: a plurality of hydraulic actuators; a plurality of direction switching valves that are provided so as to correspond to the plurality of hydraulic actuators, respectively, and each of which switches a direction of a hydraulic fluid for a corresponding one of the hydraulic actuators; and a dummy-load forming unit (97) that forms a dummy load in a low-load direction switching valve (DV8) that switches a direction of hydraulic fluid for a low-load hydraulic actuator (MT) whose hydraulic pressure required for actuation thereof is lower than a hydraulic pressure required for actuation of a high-load hydraulic actuator (C3), the low-load hydraulic actuator (MT) and the high-load hydraulic actuator (C3) being included in the plurality of hydraulic actuators, to suppress a variation in an actuation speed of the low-load hydraulic actuator (MT) between a time when the high-load hydraulic actuator (C3) and the low-load hydraulic actuator (MT) are operated in combination and a time when the low-load hydraulic actuator (MT) is operated singly.

6. 发明授权

EP3721094B1 VENTILVORRICHTUNG 有权
公开(公告)号：EP3721094B1
公开(公告)日：2022-06-01
申请号：EP19705145.1
申请日：2019-02-07
发明人： BRUCK, Peter , SCHULZ, Frank , STAUCH, Christian , LÜBBERT, Jan
IPC分类号： F15B11/044 , F15B13/04 , F15B11/05

7. 发明公开

EP3985264A1 ANORDNUNG UND VERFAHREN ZUR ANSTEUERUNG EINES HUBWERKES 审中-公开
公开(公告)号：EP3985264A1
公开(公告)日：2022-04-20
申请号：EP21201932.7
申请日：2021-10-11
申请人： Robert Bosch GmbH
发明人： Schmuttermair, Peter , Oschmann, Sebastian
IPC分类号： F15B11/05 , F15B11/10 , F15B21/08 , A01B63/10
摘要： Offenbart ist eine Anordnung zur hydraulischen Ansteuerung eines mit zumindest einem Hubzylinder ausgeführten Hubwerkes oder Anbaugerätes, wobei eine "Tragen"-Seite bei Verstellung eines Hubwerksventils in Richtung seiner "Tragen"-Funktion über einen Drosselquerschnitt mit einer Druckmittelsenke verbindbar ist.

8. 发明公开

EP3940246A1 VENTILANORDNUNG UND VERFAHREN ZUR ANSTEUERUNG EINES HUBWERKS ODER ANBAUGERÄTS 审中-公开
公开(公告)号：EP3940246A1
公开(公告)日：2022-01-19
申请号：EP21185034.2
申请日：2021-07-12
申请人： Robert Bosch GmbH
发明人： Schmuttermair, Peter
IPC分类号： F15B11/05 , F15B13/04
摘要： Offenbart sind eine Ventilanordnung und ein Verfahren zur Ansteuerung eines Hubwerks oder Anbaugeräts eines mobilen Arbeitsgeräts, wobei ein doppelt wirkender Hubzylinder über ein Wegeventil angesteuert wird. Dieses ist mit zwei Steuerkanten ausgebildet, die gleichzeitig einen Zulaufquerschnitt und einen Ablaufquerschnitt ändern, so dass beispielsweise eine Druckeinstellung am Hubzylinder in Richtung "Senken" möglich ist.

9. 发明授权

EP3679254B1 VENTIL 有权
公开(公告)号：EP3679254B1
公开(公告)日：2021-11-10
申请号：EP18766189.7
申请日：2018-09-05
发明人： BRUCK, Peter , SCHULZ, Frank
IPC分类号： F15B1/02 , B66F9/22 , F15B13/02 , F15B13/04 , F15B1/027 , F15B1/033 , F15B11/05 , B60G17/056

10. 发明授权

EP3526474B1 ABLAUFDRUCKWAAGE UND HUB-SENKVORRICHTUNG MIT EINER SOLCHEN ABLAUFDRUCKWAAGE 有权
公开(公告)号：EP3526474B1
公开(公告)日：2020-10-07
申请号：EP17761009.4
申请日：2017-08-31
申请人： Hydac Fluidtechnik GmbH
发明人： HILZENDEGEN, Philipp , BILL, Markus , HEß, Maximilian Felix
IPC分类号： F15B13/04 , F15B11/05 , F15B13/02 , F15B13/01 , G05D7/00

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