公开(公告)号：USD661778S1

公开(公告)日：2012-06-12

申请号：US29386108

申请日：2011-02-24

申请人： Graeme Dempster ,  Gerald Seidl ,  Siva Angappan ,  Jack Collie Gardiner

设计人： Graeme Dempster ,  Gerald Seidl ,  Siva Angappan ,  Jack Collie Gardiner

公开(公告)号：US20060083641A1

公开(公告)日：2006-04-20

申请号：US10961372

申请日：2004-10-12

申请人： Mark Ellens ,  Edward Leite ,  Graeme Dempster ,  Jasenn Howe

发明人： Mark Ellens ,  Edward Leite ,  Graeme Dempster ,  Jasenn Howe

IPC分类号： F04B35/04 ,  F04B17/00

CPC分类号： B63H20/10 ,  F15B15/204

摘要： A hydraulic actuator comprises a cylinder, a piston reciprocatingly received within the cylinder, a piston rod connected to the piston and a pressure release mechanism which allows hydraulic fluid to pass from a first side of the piston to a second side of the piston when the actuator encounters shock loading. This permits the piston to move. The pressure relief mechanism includes a passageway extending from the first side of the piston to the second side of the piston and a valve member adjacent to the passageway which releasably engages the piston. The valve member has a closed position where the valve member closes the passageway and engages the piston. A resilient member biases the valve member towards the closed position. A valve member limiter limits movement of the valve member away from the closed position. The resilient member has a rigidity sufficiently great so that movement of the valve member away from the closed position is more dependent upon the rigidity of the resilient member than upon a preload applied to the valve member.

公开(公告)号：US20060083640A1

公开(公告)日：2006-04-20

申请号：US10959093

申请日：2004-10-07

申请人： Mark Ellens ,  Edward Leite ,  Graeme Dempster ,  Jasenn Howe

发明人： Mark Ellens ,  Edward Leite ,  Graeme Dempster ,  Jasenn Howe

IPC分类号： F04B35/04 ,  F04B17/00

CPC分类号： F15B15/204 ,  B63H20/10

摘要： A hydraulic actuator comprises a cylinder, a piston reciprocatingly received within the cylinder, a piston rod connected to the piston and a pressure release mechanism which allows hydraulic fluid to pass from a first side of the piston to a second side of the piston when the actuator encounters shock loading. This permits the piston to move. The pressure relief mechanism includes a passageway extending from the first side of the piston to the second side of the piston and a valve member adjacent to the passageway which releasably engages the piston. The valve member has a closed position where the valve member closes the passageway and engages the piston. A resilient member biases the valve member towards the closed position. A valve member limiter limits movement of the valve member away from the closed position. The resilient member has a rigidity sufficiently great so that movement of the valve member away from the closed position is more dependent upon the rigidity of the resilient member than upon a preload applied to the valve member.

摘要翻译： 液压致动器包括气缸，往复地容纳在气缸内的活塞，连接到活塞的活塞杆和压力释放机构，当致动器致动器时液压流体从活塞的第一侧传递到活塞的第二侧 遇到震动加载。 这允许活塞移动。 减压机构包括从活塞的第一侧延伸到活塞的第二侧的通道和邻近通道的阀构件，其可释放地接合活塞。 阀构件具有关闭位置，其中阀构件关闭通道并与活塞接合。 弹性构件将阀构件偏压到关闭位置。 阀构件限制器限制阀构件远离关闭位置的运动。 弹性构件具有足够大的刚性，使得阀构件远离关闭位置的移动更多地取决于弹性构件的刚性而不是施加到阀构件的预加载。