公开(公告)号：USRE38355E1

公开(公告)日：2003-12-23

申请号：US09499568

申请日：2000-02-07

Applicant: Hartmut Sandau

Inventor： Hartmut Sandau

IPC: F16D3102

CPC classification number: F15B13/0402 ,  F15B13/0405 ,  F15B13/0433

Abstract: An electrohydraulic control device (10) for a double-acting consumer (11) is proposed, in which a continuous volumetric flow control to and from the consumer (11) is possible with two proportional 4/2-way magnet valves (12, 13), each with one seat valve function (26), and by means of two blocking valves (29, 38) of the seat valve type; free floating is attainable as the fourth work position. The magnet valves (12, 13) are structurally identical and are each connected into the volumetric flow to the consumer and the volumetric flow leaving the consumer; each consumer connection (28, 36) is sealed off tightly by a seat valve function (26) of the magnet valves (12, 13) and a blocking valve (29, 38). The magnet valves (12, 13) have a main control member (57) and a pilot control member (58), which cooperate in the manner of a followup controller and make do without a separate control oil supply, so that high hydraulic capacities can be controlled continuously and with short response times.

公开(公告)号：US3985197A

公开(公告)日：1976-10-12

申请号：US587434

申请日：1975-06-16

Applicant: Hartmut Sandau

Inventor： Hartmut Sandau

IPC: B62D5/09 ,  B62D5/087 ,  B62D5/06

CPC classification number: B62D5/087

Abstract: A hydrostatic power steering system wherein the steering wheel can rotate a pilot pump which is connected with compartments at the opposite ends of a spool reciprocably received in a valve body having ports connected with a main pump, a reservoir, the chambers of a power cylinder whose piston is connected with the steering linkage, and with spaces defined by the valve body with two plungers disposed at the opposite ends of the spool. The spool is normally held in a neutral position by two centering springs which react against the respective plungers and bias two retainers into engagement with the spool. The plungers are connected to each other by a rod which is reciprocable in an axial bore of the spool. When the steering wheel is rotated in one direction, the pilot pump causes fluid to flow into one of the compartments whereby the spool is shifted to one of two operative positions and allows the main pump to supply pressurized fluid to one chamber of the power cylinder while the other chamber discharges fluid into the reservoir. If the steering wheel is rotated in the opposite direction, the main pump supplies pressurized fluid to the other chamber of the power cylinder while the one chamber discharges fluid into the reservoir. If the piston of the power cylinder is displaced in response to external influences, the spool moves to the one or the other operative position unless the steering wheel is held by the hands of the operator whereby the spool reassumes its neutral position. The chambers of the power cylinder receive pressurized fluid by way of the pilot pump.

Abstract translation: 一种液压动力转向系统，其中所述方向盘可以旋转导向泵，所述先导泵在与主泵相连接的端口的阀体中可往复运动地容纳的阀芯的相对端处连接有隔间，所述阀体具有与主泵连接的端口，储存器，动力缸的腔室， 活塞与转向连杆连接，并且具有由阀体限定的空间，其中两个柱塞设置在阀芯的相对端。 阀芯通常通过两个定心弹簧保持在中立位置，这两个定心弹簧与相应的柱塞反应并将两个保持器偏置成与卷轴接合。 柱塞通过可在卷轴的轴向孔中往复运动的杆彼此连接。 当方向盘沿一个方向旋转时，先导泵使流体流入隔室中的一个，由此阀芯移动到两个操作位置中的一个，并且允许主泵将加压流体供应到动力缸的一个室，同时 另一个室将流体排放到储存器中。 如果方向盘沿相反方向旋转，则主泵将加压流体供应到动力缸的另一个室，同时一个室将流体排放到储存器中。 如果动力缸的活塞响应于外部影响而移动，则线轴移动到一个或另一个操作位置，除非方向盘被操作者的手握住，由此线轴重新设置其中立位置。 动力缸的腔室通过先导泵接收加压流体。

公开(公告)号：US5290007A

公开(公告)日：1994-03-01

申请号：US954916

申请日：1992-09-30

Applicant: Holger Lueues ,  Hartmut Sandau

Inventor： Holger Lueues ,  Hartmut Sandau

IPC: F15B13/043 ,  F15B13/01 ,  F16K31/363 ,  F16K31/40

CPC classification number: F15B13/015

Abstract: A control device for a volume stream of a hydraulic working medium has a blocking valve having a seat valve body cooperating with a stationary main valve seat, a pre-control valve member arranged in the seat valve member and cooperating with a valve seat provided with the seat valve member, an actuating device with which the pre-control valve member is in an operative communication, a spring providing a force with which the pre-control valve member cooperates with the valve seat and controls a pressure in a pressure chamber formed in the seat valve member and a valve housing. The seat valve member is pressed against the main valve seat under the action of the pressure, a pressure chamber for a working medium is formed, a throttle point with a constant cross-section communicates the pressure chamber between the seat valve body and the valve housing constantly with the pressure chamber of the working medium, a variable throttle point connects the pressure chamber between the seat valve body and the valve housing with a container. The variable pressure point has a cross-section which is changeable by the pre-control valve member. The actuating device which cooperate with the pre-control valve member is formed as a proportional magnet mounted on the locking valve.

Abstract translation: 一种用于液压工作介质的容积流的控制装置具有阻塞阀，该阻塞阀具有与固定主阀座配合的座阀体，布置在座阀构件中的预调节阀构件，与配有 座阀构件，用于预控阀构件处于可操作连通的致动装置，提供力的弹簧，预调节阀构件通过该力与阀座配合，并且控制压力室中形成的压力 座阀构件和阀壳体。 座压阀构件在压力的作用下被压靠在主阀座上，形成用于工作介质的压力室，具有恒定横截面的节流点将座阀阀体和阀壳体之间的压力室连通 不断地与工作介质的压力室一起，可变节流点将容器与阀座与阀壳体之间的压力室连接起来。 可变压力点具有可由预调节阀构件改变的横截面。 与预控阀构件配合的致动装置形成为安装在锁定阀上的比例磁体。

公开(公告)号：US06220288B1

公开(公告)日：2001-04-24

申请号：US09125871

申请日：1998-08-26

Applicant: Hartmut Sandau ,  Werner Schumacher ,  Holger Lueues

Inventor： Hartmut Sandau ,  Werner Schumacher ,  Holger Lueues

IPC: F15B13044

CPC classification number: F15B13/043 ,  F15B11/003 ,  F15B13/01 ,  F15B2211/20553 ,  F15B2211/3051 ,  F15B2211/3057 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/327 ,  F15B2211/6054 ,  Y10T137/87217 ,  Y10T137/87241

Abstract: An electro-hydraulic control device (10, 60) for a hydraulic servo motor for controlling a volume flow is proposed, which is embodied as a 4/2 valve module. A blocking valve in accordance with seat valve technology between a motor connection (B) and a return flow (R) form a lowering element (11), while the associated unblocking member (44) is designed as a longitudinal slide (45), which controls the connection between an inflow connection (P) and a motor connection (A) and is actuated by a proportional magnet (16). After unblocking the blocking valve, its seat valve body (23) is mechanically taken along by the longitudinal slide (45), and the two volume flows are proportionally controlled via the lowering element (11) and the lifting element (12), so that a large switching capacity is achieved along with a construction with few leaks.

Abstract translation: 提出了一种用于控制体积流量的液压伺服电机的电动液压控制装置（10,60），其被实现为4/2阀模块。 根据座阀技术，在电动机连接（B）和回流（R）之间形成下降元件（11）的阻塞阀，而相关联的阻挡件（44）被设计成纵向滑动件（45），其中 控制流入连接（P）和马达连接（A）之间的连接，并由比例磁体（16）致动。 在阻塞阻塞阀之后，其座阀体（23）由纵向滑块（45）机械地截取，并且两个体积流量通过下降元件（11）和提升元件（12）成比例地控制，使得 实现了大的开关容量，同时具有很少的泄漏的结构。

公开(公告)号：US4303197A

公开(公告)日：1981-12-01

申请号：US175182

申请日：1980-07-31

Applicant: Hartmut Sandau

Inventor： Hartmut Sandau

IPC: F15B21/04 ,  G05D27/00

CPC classification number: F15B21/042 ,  Y10T137/1804 ,  Y10T137/7737 ,  Y10T137/7766

Abstract: The control valve for keeping constant viscosity and temperature of a pressure medium in a hydraulic circuit includes a preliminary control valve which supports a temperature sensitive control element and adjustable throttling means including a throttling plunger controlled by the control element; a control slider arranged in the valve upstream of the preliminary control valve is provided with first throttling means for admitting pressure medium against the preliminary control valve to establish a bypass connection in addition to the main connection controlled by the slider; to avoid excessive temperature increase of the medium in the case of a damage of the control element, a temperature sensitive shearing pin is provided between the control element and the throttling plunger to cause an override of the plunger to a position in which an additional bypass connection is established which prevents throttling and thus temperature increase of the pressure medium.

Abstract translation: 用于在液压回路中保持压力介质的恒定粘度和温度的控制阀包括支撑温度敏感控制元件的预调节阀和包括由控制元件控制的节流柱塞的可调节流装置; 布置在预控阀上游的阀中的控制滑块设置有第一节流装置，除了由滑块控制的主连接之外，还允许压力介质抵靠预控阀，以建立旁路连接; 为了避免在控制元件损坏的情况下介质温度过高，在控制元件和节流柱塞之间设置一个温度敏感的剪切销，以使柱塞超驰到一个附加旁路连接 被建立，其防止压力介质的节流和因此的温度升高。

公开(公告)号：US4164242A

公开(公告)日：1979-08-14

申请号：US891858

申请日：1978-03-30

Applicant: Hartmut Sandau

Inventor： Hartmut Sandau

IPC: F15B1/18 ,  F16K1/30 ,  F17C13/04 ,  F16L55/04

CPC classification number: F16K1/303 ,  F15B1/18 ,  F17C13/04 ,  F15B2201/205 ,  F15B2201/3151 ,  F15B2201/411 ,  F15B2201/43 ,  F15B2201/615 ,  F17C2205/0382

Abstract: A pressure tank includes a hollow container which has an outlet for discharging fluid therefrom. The outlet is provided with a valve seat, for receiving a valve member which is slidably mounted in the container above the valve seat for respective movement between an open position, so that fluid in the container can flow therefrom through the outlet and a closed position so as to prevent discharging of fluid out of the container. A flexible partition is provided in the container, subdividing the interior thereof into a gas-containing compartment and into a liquid-containing compartment. The partition is displaceable on expansion of gas in the gas compartment, into an extended position immediately adjacent the outlet. An element is connected to the valve member, which element cooperates with the partition in the extended position of the same so as to prevent premature movement of the valve member into the closed position until the container is empty.

Abstract translation: 压力罐包括具有用于从其排出流体的出口的中空容器。 出口设置有阀座，用于接收阀构件，该阀构件可滑动地安装在阀座上方的容器中，用于在打开位置之间相应运动，使得容器中的流体可以通过出口流过，并且闭合位置 以防止流体从容器中排出。 在容器中设置有柔性隔板，将其内部分成含气室并进入含液室。 分隔件可在气室中的气体膨胀时移动到紧邻出口的延伸位置。 元件连接到阀构件，该元件在其延伸位置处与隔板配合，以防止阀构件过早运动到关闭位置，直到容器空。

公开(公告)号：US4096787A

公开(公告)日：1978-06-27

申请号：US730713

申请日：1976-10-08

Applicant: Hartmut Sandau ,  Wilhelm Weigert ,  Winfried Steinel ,  August Kraisel ,  Klaus Ritter ,  Erwin Gaub ,  Heinrich Kochendorfer

Inventor： Hartmut Sandau ,  Wilhelm Weigert ,  Winfried Steinel ,  August Kraisel ,  Klaus Ritter ,  Erwin Gaub ,  Heinrich Kochendorfer

IPC: B23K20/12 ,  B23P15/00 ,  B23P15/10 ,  F16J1/12

CPC classification number: B23P15/00 ,  B23K20/129 ,  Y10T29/49256 ,  Y10T403/32918 ,  Y10T403/478

Abstract: A piston rod connected at one end to a piston slidably arranged in a cylinder projects with its other end through an opening in an end wall of the cylinder beyond the latter and a fork-shaped member is connected by a friction weld, that is without adding welding material or external heat, to the other end of the piston rod.

Abstract translation: 活塞杆的一端连接到可滑动地布置在圆筒中的活塞，其另一端通过气缸的端壁中的开口延伸超过后者，并且叉形构件通过摩擦焊接连接，即不添加 焊接材料或外部热量，到活塞杆的另一端。