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1. 发明授权

US3961672A Impact hammer post driver 失效
标题翻译：冲击锤头驱动
公开(公告)号：US3961672A
公开(公告)日：1976-06-08
申请号：US523260
申请日：1974-11-13
申请人： John H. Welsch , Edward J. Sparrow
发明人： John H. Welsch , Edward J. Sparrow
IPC分类号： E04H17/26
CPC分类号： E04H17/263
摘要： The post driver apparatus of the instant invention is designed to be mounted on a truck chassis that can be readily moved from site to site and comprises a fluid-pressure impact hammer mounted in a shock absorbing cage assembly that permits rapid driving of posts into the ground without transmission of substantial shock forces to the frame and chassis on which the post driver is mounted. The apparatus is also equipped with means to vary the location and orientation of the impact hammer with respect to the truck chassis thereby minimizing the precision with which the truck chassis must be located.
摘要翻译：本发明的后驱动装置被设计成安装在可以容易地从现场移动的卡车底盘上，并且包括安装在减震笼中的流体压力冲击锤，其允许柱快速地驱动到地面而不会对安装有柱塞驱动器的框架和底盘传输显着的冲击力。该装置还配备有用于改变冲击锤相对于卡车底盘的位置和方向的装置，从而使卡车底盘必须定位的精度最小化。

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