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1. 发明授权

US06564610B2 Hydraulic tool having mechanical actuator with internal bypass valve 有权
标题翻译：液压工具具有内部旁通阀的机械执行器
公开(公告)号：US06564610B2
公开(公告)日：2003-05-20
申请号：US09883549
申请日：2001-06-18
申请人： John David Lefavour , Armand Thomas Montminy
发明人： John David Lefavour , Armand Thomas Montminy
IPC分类号： B21J912
CPC分类号： F15B7/04 , B25B27/10 , F15B15/18 , H01R43/0427
摘要： A hydraulic compression tool having a frame, a hydraulic fluid reservoir on the frame, a ram movably connected to the frame, a conduit system in the frame between the reservoir and the ram, a pump provided in the conduit system, a mechanical actuator provided in the conduit system for contacting the ram, and a bypass valve in the conduit system between a rear end of the ram and a channel of the conduit system to the rear end of the mechanical actuator. The conduit system is adapted to conduit fluid from, the pump against both the rear end of the ram and a rear end of the mechanical actuator. The bypass valve is located, at least partially, in a housing member of the mechanical actuator.
摘要翻译：具有框架的液压压缩工具，框架上的液压流体储存器，可移动地连接到框架的柱塞，在储存器和柱塞之间的框架中的管道系统，设置在管道系统中的泵，设置在机械致动器中的机械致动器用于接触冲头的管道系统和管道系统中的旁通阀在冲头的后端和管道系统的通道到机械致动器的后端之间。导管系统适用于将泵的流体从泵的后端引导到机械致动器的后端。旁通阀至少部分地位于机械致动器的壳体构件中。

2. 发明授权

US6113073A Hydraulic spike puller with frictionally delayed moving jaws and blocking jaw front shape 失效
标题翻译：具有摩擦延迟的移动夹爪和阻塞钳口前部形状的液压千斤顶拉杆
公开(公告)号：US6113073A
公开(公告)日：2000-09-05
申请号：US338417
申请日：1999-06-22
申请人： John David Lefavour , Raymond G. Lavoie
发明人： John David Lefavour , Raymond G. Lavoie
IPC分类号： B25C11/02 , E01B29/26 , B25C11/00
CPC分类号： B25C11/02 , E01B29/26
摘要： A hydraulic spike puller comprising a frame with a chute, a hydraulic drive section connected to the frame, and a spike contacting section connected to the hydraulic drive section and movably located in the chute. The improvement comprises the spike contacting section comprising two jaws pivotably connected to each other and a friction system extending from the jaws and contacting opposite interior sides of the chute. The jaws each have a spike contacting claw section which, when the jaws are in an open position, have a back surface adjacent an interior side of the chute to block an area between the chute and the back surface. The claw sections have substantially non-curved bottom faces which, when the jaws are in the open position, can push a spike out of the chute. The claw sections are shaped to prevent a spike from being caught between the chute and the back surfaces of the claw sections.
摘要翻译：液压千斤顶拉拔器，包括具有滑槽的框架，连接到框架的液压驱动部分，以及连接到液压驱动部分并且可移动地位于滑槽中的棘爪接触部分。该改进包括具有可枢转地彼此连接的两个夹爪和从夹爪延伸并接触滑槽的相对内侧的摩擦系统的钉接触部分。夹爪各具有尖峰接触爪部分，当钳口处于打开位置时，其具有邻近滑槽内侧的后表面，以阻挡滑槽和后表面之间的区域。爪部具有基本上非弯曲的底面，当夹爪处于打开位置时，可以将尖钉推出滑槽。爪形部分被成形为防止尖头被夹在滑槽和爪部分的后表面之间。

3. 发明授权

US6098960A Hydraulic spike puller 失效
标题翻译：液压千斤顶拉杆
公开(公告)号：US6098960A
公开(公告)日：2000-08-08
申请号：US283270
申请日：1999-03-31
申请人： John David Lefavour , Raymond G. Lavoie
发明人： John David Lefavour , Raymond G. Lavoie
IPC分类号： B25C11/02 , E01B29/26 , B25C11/00
CPC分类号： B25C11/02 , E01B29/26
摘要： A hydraulic spike puller having a frame, a hydraulic drive section connected to the frame, and a spike contacting section connected to the hydraulic drive section. The spike puller has a handle repositionably connected to the frame. The handle is positionable in a straddle position or a parallel position relative to a railroad rail to pull a spike.
摘要翻译：具有框架的液压千斤顶拉拔器，连接到框架的液压驱动部分和连接到液压驱动部分的尖钉接触部分。尖钉拔出器具有可重新定位地连接到框架的手柄。手柄可以相对于铁路轨道定位在跨骑位置或平行位置以拉动钉。

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