发明名称 Sidewalk and slab lifting system
摘要 A tube body having open upper and lower ends and a cylindrical bore there between has an opening along the length thereof. A driver is secured to the tube body adjacent to the upper end. A push rod has a free end. The free end is adapted to move downwardly to an advanced orientation adjacent to the lower end and upwardly to a retracted orientation above the opening. A control component with an operator controlled handle is adapted to move the ram. A funnel is secured to the tube body. The funnel is adapted to feed particulate material into the bore when in the retracted orientation and from the bore when in the advanced orientation.
申请公布号 US7461997(B1) 申请公布日期 2008.12.09
申请号 US20060644918 申请日期 2006.12.22
申请人 MACK II THOMAS M 发明人 MACK, II THOMAS M.
分类号 E01C23/10 主分类号 E01C23/10
代理机构 代理人
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