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1. 发明申请

US20050011189A1 Method of operating a hydraulic system for a loader machine 有权
标题翻译：操作装载机的液压系统的方法
公开(公告)号：US20050011189A1
公开(公告)日：2005-01-20
申请号：US10885325
申请日：2004-07-06
申请人： David Cook , Ben Covell
发明人： David Cook , Ben Covell
IPC分类号： B66F9/065 , B66F9/22 , E02F9/22 , F16D31/02
CPC分类号： E02F9/2203 , B66F9/0655 , B66F9/22 , E02F9/2207 , E02F9/2217 , E02F9/2221
摘要： A method of operating a hydraulic system of a loader arm carrying a working implement, the system having a ride improvement system and a selection valve connected to first and second chambers of a ram which operates the loader arm. A check valve assembly is provided, with the check valve assembly being responsive to pressure changes in the second chamber. The check valve assembly, when closed, prevents fluid from passing between the first chamber to the selection valve. Means are provided communicating the fluid pressure in the second chamber to the check valve, with the means responsive to pressure changes in the second chamber to open the check valve. The selection valve is operable to raise the loader arm with the system arranged to permit passage of fluid between the first chamber and the accumulator while permitting fluid to pass from the second chamber to a low pressure region.
摘要翻译：一种操作承载工作工具的装载臂的液压系统的方法，该系统具有行驶改进系统和连接到操作装载臂的压头的第一和第二室的选择阀。提供止回阀组件，其中止回阀组件响应于第二室中的压力变化。止回阀组件在关闭时防止流体在第一室与选择阀之间通过。提供了将第二室中的流体压力传递到止回阀的装置，其中响应于第二室中的压力变化的装置打开止回阀。选择阀可操作以升高装载臂，该系统布置成允许流体在第一室和蓄液器之间通过，同时允许流体从第二室传递到低压区域。

2. 发明申请

US20070251129A1 Method of operating a hydraulic system for a loader machine 审中-公开
公开(公告)号：US20070251129A1
公开(公告)日：2007-11-01
申请号：US11786825
申请日：2007-04-13
申请人： David Cook , Ben Covell
发明人： David Cook , Ben Covell
IPC分类号： E02F1/00
CPC分类号： E02F9/2203 , B66F9/0655 , B66F9/22 , E02F9/2207 , E02F9/2217 , E02F9/2221
摘要： A method of operating a hydraulic system of a loader arm carrying a working implement, the system having a ride improvement system and a selection valve connected to first and second chambers of a ram which operates the loader arm. A check valve assembly is provided, with the check valve assembly being responsive to pressure changes in the second chamber. The check valve assembly, when closed, prevents fluid from passing between the first chamber to the selection valve. Means are provided communicating the fluid pressure in the second chamber to the check valve, with the means responsive to pressure changes in the second chamber to open the check valve. The selection valve is operable to raise the loader arm with the system arranged to permit passage of fluid between the first chamber and the accumulator while permitting fluid to pass from the second chamber to a low pressure region.

3. 发明授权

US07204086B2 Method of operating a hydraulic system for a loader machine 有权
标题翻译：操作装载机的液压系统的方法
公开(公告)号：US07204086B2
公开(公告)日：2007-04-17
申请号：US10885325
申请日：2004-07-06
申请人： David A. Cook , Ben Covell
发明人： David A. Cook , Ben Covell
IPC分类号： F16D31/02
CPC分类号： E02F9/2203 , B66F9/0655 , B66F9/22 , E02F9/2207 , E02F9/2217 , E02F9/2221
摘要： A method of operating a hydraulic system of a loader arm carrying a working implement, the system having a ride improvement system and a selection valve connected to first and second chambers of a ram which operates the loader arm. A check valve assembly is provided, with the check valve assembly being responsive to pressure changes in the second chamber. The check valve assembly, when closed, prevents fluid from passing between the first chamber to the selection valve. Means are provided communicating the fluid pressure in the second chamber to the check valve, with the means responsive to pressure changes in the second chamber to open the check valve. The selection valve is operable to raise the loader arm with the system arranged to permit passage of fluid between the first chamber and the accumulator while permitting fluid to pass from the second chamber to a low pressure region.
摘要翻译：一种操作承载工作工具的装载臂的液压系统的方法，该系统具有行驶改进系统和连接到操作装载臂的压头的第一和第二室的选择阀。提供止回阀组件，其中止回阀组件响应于第二室中的压力变化。止回阀组件在关闭时防止流体在第一室与选择阀之间通过。提供了将第二室中的流体压力传递到止回阀的装置，其中响应于第二室中的压力变化的装置打开止回阀。选择阀可操作以升高装载臂，该系统布置成允许流体在第一室和蓄液器之间通过，同时允许流体从第二室传递到低压区域。

4. 发明授权

US07089734B2 Hydraulic system for wheeled loader 有权
标题翻译：轮式装载机液压系统
公开(公告)号：US07089734B2
公开(公告)日：2006-08-15
申请号：US09866311
申请日：2001-05-25
申请人： David Allan Cook , Ben Covell
发明人： David Allan Cook , Ben Covell
IPC分类号： F16D31/02
CPC分类号： B66F9/0655 , B66F9/22 , E02F9/2207 , E02F9/2217
摘要： An hydraulic system for a wheeled loader comprising a loader arm assembly which carries a working implement and which is connected to the body and which is movable between raised and lowered positions by means of a hydraulic ram means and in which a hydraulic accumulator is connected to the Hydraulic ram means wherein the loader arm assembly is connected at, or adjacent to, the rear end thereof to the body at, or adjacent to, the rear end thereof so that the loader arm assembly extends forwardly whereby, in a lowered position of the loader arm assembly, the working implement is disposed in front of the body wherein each chamber of the hydraulic ram means is connected to a selection valve means adapted to feed fluid under pressure to one chamber of the ram means and to receive fluid at a lower pressure from the other chamber of the ram means in order to raise the loader arm assembly or to feed fluid under pressure to said other chamber of the ram means and receive fluid at a lower pressure from said one chamber of the ram means to lower the loader arm assembly, first and second control valves each of which is movable between a first position in which passage of hydraulic fluid therethrough is prevented in one or both directions respectively to a second position in which passage of hydraulic fluid therethrough is permitted, said first control valve means being connected between said first chamber and said accumulator and said second valve means being connected between said second chamber and a low pressure region and there being a check valve connected between the first chamber and the selection valve means such that the check valve is normally closed to prevent fluid under pressure passing from said first chamber to the selection valve means and having hydraulic fluid responsive means to open said check valve and there being means to connect said hydraulic fluid pressure means to said second chamber so as to open the check valve.
摘要翻译：一种用于轮式装载机的液压系统，包括装载臂组件，该装载臂组件承载工作工具，该装载臂组件连接到主体并且可通过液压缸装置在升降位置之间移动，并且液压蓄能器连接到液压压头装置，其中装载臂组件在其后端处或其后端连接到主体或其后端附近，使得装载臂组件向前延伸，由此在装载机的下降位置工作装置设置在主体的前面，其中液压压头装置的每个室连接到选择阀装置，该选择阀装置适于将压力下的流体供给到压头装置的一个室，并且以更低的压力接收流体压头的另一个腔室是为了升高装载臂组件或将压力下的流体供给到压头装置的另一个腔室，并在较低压力下接收流体从所述冲压器的所述一个腔室中移动到使所述装载臂组件下降的第一和第二控制阀，所述第一和第二控制阀可在第一位置和第二位置之间移动，所述第一和第二控制阀可以在第一位置和第二位置之间移动，所述第一控制阀装置连接在所述第一室和所述储存器之间，所述第二阀装置连接在所述第二室和低压区之间，并且止回阀连接在第一室和第二室之间，以及选择阀装置，使得止回阀常闭，以防止在压力下的流体从所述第一腔室到达选择阀装置并且具有液压流体响应装置以打开所述止回阀，并且存在用于连接所述液压流体压力装置到所述第二室以打开止回阀。

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