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1. 发明授权

US5394701A Brake valve with prefill chamber unloading valve 失效
标题翻译：具有预充气室卸载阀的制动阀
公开(公告)号：US5394701A
公开(公告)日：1995-03-07
申请号：US201549
申请日：1994-02-25
申请人： Douglas M. Durant , Larry M. Delfs , Derek M. Eagles
发明人： Douglas M. Durant , Larry M. Delfs , Derek M. Eagles
IPC分类号： B60T13/12 , B60T11/21 , B60T11/224 , B60T13/16 , B60T15/04 , F15B7/00 , B60T11/26
CPC分类号： B60T13/165 , B60T11/21 , B60T11/224
摘要： Left and right two stage brake valves communicate fluid pressure to left and right brake mechanisms, each brake valve having an inlet for receiving pressurized brake fluid, a reservoir, a stepped bore and a stepped piston. The stepped bore and the stepped piston forming a high volume prefill chamber and a high pressure chamber. A prefill drain valve communicates the prefill chambers to the reservoir only when pump pressure is available at the inlet and blocks communication between the left and right prefill chambers and between the prefill chambers and a reservoir when pump pressure is not available at the inlet.
摘要翻译：左右两级制动阀将流体压力传递到左右制动机构，每个制动阀具有用于接收加压制动液的入口，储存器，阶梯式孔和阶梯式活塞。台阶孔和阶梯式活塞形成大容量预填室和高压室。只有在入口处有泵压力时，预填充排水阀才将预填室连通到储存器，并阻止在左右预填室之间以及预填室与存储器之间的连通，当泵入口处没有泵压力时。

2. 发明授权

US5245827A Supply valve arrangement for closed center hydraulic system 失效
标题翻译：供应闭式中央液压系统的阀门装置
公开(公告)号：US5245827A
公开(公告)日：1993-09-21
申请号：US923762
申请日：1992-08-03
申请人： Douglas M. Durant , Larry M. Delfs , Derek M. Eagles , Ronald L. Pratt
发明人： Douglas M. Durant , Larry M. Delfs , Derek M. Eagles , Ronald L. Pratt
IPC分类号： A01B63/10 , F15B11/00 , F15B21/08
CPC分类号： F15B21/08
摘要： A hydraulic system includes a hydraulic pump which provides pressurized fluid at an output port as a function of pressure in a load sensing port, a hydraulic reservoir, and a load pressure sensing line connected to the load sensing port. A solenoid operated implement control valve controls fluid communication to and from a hydraulic function such as a cylinder. A supply control valve has a first position wherein the reservoir is communicated with the load sensing port and a second position wherein the pump output port is communicated with the load sensing port. A spring urges the valve member to its first position, and a solenoid is energizable to move the valve member to its second position. The solenoid is energized when the implement control valve is activated so that the supply control valve communicates pump pressure to the load sensing port and the pump will operate at full capacity whenever the second hydraulic function is operated.
摘要翻译：液压系统包括液压泵，其在输出端口处提供加压流体作为负载感测端口，液压储存器和连接到负载感测端口的负载压力感测线路上的压力的函数。电磁操作的工具控制阀控制与液压功能（例如气缸）的流体连通。供应控制阀具有第一位置，其中储存器与负载感测端口连通，第二位置，其中泵输出端口与负载感测端口连通。弹簧将阀构件推动到其第一位置，并且螺线管被激励以将阀构件移动到其第二位置。当工具控制阀被启动时，螺线管通电，使得供应控制阀将泵压力传递到负载感测端口，并且每当操作第二液压功能时，泵将以满容量运行。

3. 发明授权

US4881573A Female hydraulic coupler with push-connect and lever disconnect 失效
标题翻译：女式液压联轴器，带有推动连接和杠杆断开
公开(公告)号：US4881573A
公开(公告)日：1989-11-21
申请号：US304699
申请日：1989-01-31
申请人： Douglas M. Durant , Uwe H. Kugler , Bennie J. Vaughn , Douglas W. Nordquist , Larry M. Delfs
发明人： Douglas M. Durant , Uwe H. Kugler , Bennie J. Vaughn , Douglas W. Nordquist , Larry M. Delfs
IPC分类号： F16L37/23 , F16L37/32 , F16L37/56
CPC分类号： F16L37/32 , F16L37/23 , F16L37/56 , Y10T137/87957 , Y10T137/87973
摘要： A female coupler can operate in both a push-pull and a lever-actuated connect/disconnect fashion. Double lock ball controlling ramp surfaces are provided around the receiving bore of the coupler to allow the lock balls of the coupler to withdraw from the receiving bore when the receptacle is moved either into or out of the housing. The coupler can be moved into or out of the housing by pushing the male coupler into or pulling it out of the female coupler, or by use of a lever-actuated cam. A piston-type flow-check valve is provided to open the male check ball and hold it open despite transient surges. This flow-check valve is hydraulically actuated. A bleed valve for the hydraulically actuated flow-check valve is activated to release the flow-check valve when the lever is actuated or when the receptacle is pushed into the housing, thereby reducing the force needed for coupling. The lever can bleed and activate a plurality of couplers simultaneously, whereby multiple couplers can be connected or disconnected simultaneously.
摘要翻译：母连接器可以同时以推挽和杠杆驱动的连接/断开方式工作。双联锁球控制斜面表面设置在联接器的接收孔周围，以便当容器移入或移出壳体时，耦合器的锁定球从接收孔中退出。通过将阳联接器推入或从阴连接器拉出，或通过使用杠杆致动凸轮，联接器可以移入或移出外壳。提供活塞式止回阀以打开男性止回球，并且尽管瞬态喘振而保持其打开。该止回阀是液压驱动的。用于液压致动的止回阀的排放阀在启动杆时或当容器被推入壳体中时被启动以释放流量单向阀，由此减小联接所需的力。杠杆可以同时泄放并激活多个耦合器，从而可以同时连接或断开多个耦合器。

4. 发明授权

US4713936A Motor seal protector valve 失效
标题翻译：电机密封保护阀
公开(公告)号：US4713936A
公开(公告)日：1987-12-22
申请号：US799057
申请日：1985-11-18
申请人： Dennis R. Barber , Larry M. Delfs , Ronnie F. Burk
发明人： Dennis R. Barber , Larry M. Delfs , Ronnie F. Burk
IPC分类号： F15B20/00 , F15B11/02 , F15B13/042 , F16K21/04
CPC分类号： F15B11/02 , F15B2211/20538 , F15B2211/30505 , F15B2211/3111 , F15B2211/3127 , F15B2211/3144 , F15B2211/329 , F15B2211/40515 , F15B2211/41572 , F15B2211/7058
摘要： A hydraulic motor has its lube drain connected to the motor return line. A motor seal protector valve has a pilot which responds to pressure in the motor return line. Normally, the valve connects system pressure to the motor inlet. High pressure in the return line causes the pilot to move the valve to block the motor feed line and then to connect the motor feed line to sump. In a preferred embodiment, system pressure is connected to the plot to "lock up" the valve in response to return line overpressurization.
摘要翻译：液压马达的润滑油排放口与马达回流管路相连。电动机密封保护器阀具有对电动机返回线中的压力作出响应的先导。通常，阀将系统压力连接到电机入口。返回线路中的高压使得飞行员移动阀门以阻止马达进给线，然后将马达进给线连接到油槽。在优选实施例中，系统压力连接到曲线，以响应于回流线过压而“锁定”阀。

5. 外观设计

USD326709S Selective control valve used to operate implements attached to a tractor 失效
公开(公告)号：USD326709S
公开(公告)日：1992-06-02
申请号：US351815
申请日：1989-05-15
申请人： Douglas M. Durant , Larry M. Delfs , Cristian J. Felix , William E. Crookes
设计人： Douglas M. Durant , Larry M. Delfs , Cristian J. Felix , William E. Crookes

6. 发明授权

US4696367A Auxiliary hydrostatic drive system 失效
标题翻译：辅助液压驱动系统
公开(公告)号：US4696367A
公开(公告)日：1987-09-29
申请号：US826459
申请日：1986-02-05
申请人： Larry M. Delfs
发明人： Larry M. Delfs
IPC分类号： B60K17/356 , F16H61/40 , F16H61/4017 , B60K17/34
CPC分类号： B60K17/356 , F16H61/40 , F16H61/4017
摘要： A combine includes a variable displacement, reversible delivery pump which drives main drive wheels via a main hydraulic drive unit and which drives a pair of steerable wheels via auxiliary hydraulic drive units. A pair of pressure-limiting and relieving valves are connected between the auxiliary drive units and the pump so that auxiliary drive units with lower pressure ratings than that of the main drive units can be used. The valves relieve pressure from the auxiliary drive units during dynamic braking.
摘要翻译：组合包括可变排量的可逆输送泵，其经由主液压驱动单元驱动主驱动轮，并且经由辅助液压驱动单元驱动一对可转向轮。在辅助驱动单元和泵之间连接有一对压力限制和释放阀，使得可以使用具有比主驱动单元的额定压力更低的辅助驱动单元。在动态制动期间，该阀释放辅助驱动单元的压力。

7. 发明授权

US4630526A Force control system including bypass flow path for implement with relatively movable frame parts 失效
标题翻译：力控制系统包括用于具有相对可移动的框架部件的工具的旁路流路
公开(公告)号：US4630526A
公开(公告)日：1986-12-23
申请号：US731699
申请日：1985-05-08
申请人： Ronnie F. Burk , Larry M. Delfs , Michael R. Gilmore , Warren L. Thompson
发明人： Ronnie F. Burk , Larry M. Delfs , Michael R. Gilmore , Warren L. Thompson
IPC分类号： A01B63/14 , A01B63/32 , F15B13/06 , A01B73/00 , B60G11/30
CPC分类号： A01B63/32 , A01B63/14
摘要： A weight-balancing system for a farm implement, such as a disk harrow with foldable wings operated by wingfold cylinders, includes a selective control valve for controlling fluid communication to the head and rod ends of the wingfold cylinders. A pair of pressure-reducing/relieving valves permit individual adjustment of the pressures in both the head and rod ends to achieve the desired balance. In a preferred embodiment, a pilot-operated, two-position valve is connected between the rod ends and one of the pressure-responsive valves. The two-position valve is operated by pressure signals generated by a flow-responsive switching valve connected between the two-position valve and the selective control valve. The switching valve and the two-position valve cooperate to block the pressure-controlled outlet of the one pressure-responsive valve and the rod ends and to bypass return fluid flow from the rod ends to sump when the cylinders are being extended. Then, when cylinder motion stops and this return flow ends, the switching valve and the two-position valve are connected to the control pressure outlet of the one pressure-responsive valve to the rod ends to achieve the desired balance.
摘要翻译：用于农具的重量平衡系统，例如具有由翼折缸操作的可折叠翼的盘耙包括选择性控制阀，用于控制与翼折缸的头部和杆端的流体连通。一对减压/释放阀允许单独调节头部和杆端部中的压力以实现期望的平衡。在优选实施例中，先导操作的两位置阀连接在杆端和其中一个压力响应阀之间。双位置阀由连接在两位置阀和选择性控制阀之间的流量响应式开关阀产生的压力信号操作。切换阀和两位置阀合作阻止一个压力响应阀和杆端的压力控制的出口，并且当气缸延伸时绕过从杆端返回的液体流到集油槽。然后，当缸体运动停止并且该返回流程结束时，切换阀和两位置阀连接到一个压力响应阀的控制压力出口到杆端，以实现期望的平衡。

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