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1. 发明授权

EP0883753B1 LASTHALTE-BREMSVENTIL 失效
标题翻译：安全检查制动阀
公开(公告)号：EP0883753B1
公开(公告)日：2002-04-17
申请号：EP97907055.4
申请日：1997-02-28
申请人： Bucher Hydraulics AG
发明人： HÄUSSLER, Hubert , HRISTOV, Ivan , STAIGER, Hans , ZÜRCHER, Josef
IPC分类号： F15B13/01
CPC分类号： F15B13/015 , F15B2013/008 , Y10T137/2544
摘要： The invention relates to a hydraulically controlled valve for double-acting consumers, which discharges during the lowering mode in a throttled manner a load volume flow from connection B to connection A. To this end, the valve has a valve seat (5) which comes into contact with a sealing surface (4) of a main piston (3) in which a pilot piston (8) is guided concentrically which comes into contact with a sealing surface (7) of a pilot valve seat (7) in the main piston. Said main piston (3) and said pilot piston (8) are held by load pressure and/or by resilient force on the valve seat (5) or the pilot valve seat (6). The pilot piston (8) has on the pressure-relieved side a piston shank (9) extending in a seat bore and having a continuously decreasing throttling action, in particular throttle grooves (10) which form a throttling point. When hydraulically actuated the pilot piston (8) can be axially displaced by a control piston (20) with the result that the pilot valve (5, 6) opens and there is a load volume flow via the throttling point from a pilot chamber (15) accommodating the springs. The resultant decrease in load pressure causes axially displacement of the main piston (3) and opening of the valve seat. An additional damping valve arrangement reduces load oscillations which occur. A pressure-limiting-valve independent of the return pressure is incorporated in the load-holding brake-valve housing.

2. 发明公开

EP1915538A1 SCHALTUNG ZUR ANSTEUERUNG EINES DOPPELTWIRKENDEN HYDRAULISCHEN ANTRIEBSZYLINDERS 有权
标题翻译：电路，用于控制双作用液压油缸驱动
公开(公告)号：EP1915538A1
公开(公告)日：2008-04-30
申请号：EP06701053.8
申请日：2006-01-27
申请人： Bucher Hydraulics AG
发明人： HRISTOV, Ivan , ZÜRCHER, Josef
IPC分类号： F15B11/044 , F15B11/024
CPC分类号： F15B11/003 , B66F9/22 , E02F9/2203 , F15B11/024 , F15B13/021 , F15B2211/30505 , F15B2211/3051 , F15B2211/30515 , F15B2211/30525 , F15B2211/3058 , F15B2211/3127 , F15B2211/3144 , F15B2211/31576 , F15B2211/31588 , F15B2211/329 , F15B2211/351 , F15B2211/353 , F15B2211/50518 , F15B2211/55 , F15B2211/88
摘要： The invention relates to a circuit for controlling a double-action hydraulic drive cylinder (1), which is controlled by a directional control valve (5) equipped with working connections (A, B). Hydraulic fluid can be fed to a piston chamber (11), whereas hydraulic oil simultaneously discharges from a rod chamber (12), and hydraulic fluid can be fed to a rod chamber (12), whereas hydraulic oil simultaneously discharges from a piston chamber (11). The invention is characterized in that: the piston chamber (11) is connected to the rod chamber (12) via a parallel connection consisting of a pressure limiting valve (21) and of a controllable load maintaining valve (26) and via an automatic regeneration check valve (22) arranged parallel thereto; a first pretensioning valve (24) and an automatic by-pass check valve (28) situated antiparallel thereto are arranged between the connection point between the pressure limiting valve (21), load maintaining valve (26), the regeneration control valve (22) and the working connection (A) of the directional control valve (5); and another pretensioning valve (30; 45) is arranged inside a line between the rod chamber (12) and a tank in a series connection with the directional control valve (5). The invention enables a regeneration from the piston chamber (11) to the rod chamber (12) whereby reducing the power requirement for operating the pump.

3. 发明授权

EP1915538B1 SCHALTUNG ZUR ANSTEUERUNG EINES DOPPELTWIRKENDEN HYDRAULISCHEN ANTRIEBSZYLINDERS 有权
标题翻译：电路，用于控制双作用液压油缸驱动
公开(公告)号：EP1915538B1
公开(公告)日：2012-04-04
申请号：EP06701053.8
申请日：2006-01-27
申请人： Bucher Hydraulics AG
发明人： HRISTOV, Ivan , ZÜRCHER, Josef
IPC分类号： F15B11/044 , F15B11/024
CPC分类号： F15B11/003 , B66F9/22 , E02F9/2203 , F15B11/024 , F15B13/021 , F15B2211/30505 , F15B2211/3051 , F15B2211/30515 , F15B2211/30525 , F15B2211/3058 , F15B2211/3127 , F15B2211/3144 , F15B2211/31576 , F15B2211/31588 , F15B2211/329 , F15B2211/351 , F15B2211/353 , F15B2211/50518 , F15B2211/55 , F15B2211/88
摘要： The invention relates to a circuit for controlling a double-action hydraulic drive cylinder (1), which is controlled by a directional control valve (5) equipped with working connections (A, B). Hydraulic fluid can be fed to a piston chamber (11), whereas hydraulic oil simultaneously discharges from a rod chamber (12), and hydraulic fluid can be fed to a rod chamber (12), whereas hydraulic oil simultaneously discharges from a piston chamber (11). The invention is characterized in that: the piston chamber (11) is connected to the rod chamber (12) via a parallel connection consisting of a pressure limiting valve (21) and of a controllable load maintaining valve (26) and via an automatic regeneration check valve (22) arranged parallel thereto; a first pretensioning valve (24) and an automatic by-pass check valve (28) situated antiparallel thereto are arranged between the connection point between the pressure limiting valve (21), load maintaining valve (26), the regeneration control valve (22) and the working connection (A) of the directional control valve (5); and another pretensioning valve (30; 45) is arranged inside a line between the rod chamber (12) and a tank in a series connection with the directional control valve (5). The invention enables a regeneration from the piston chamber (11) to the rod chamber (12) whereby reducing the power requirement for operating the pump.

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