发明名称 One man operated, twin wheel mounted powered earth drill
摘要 Quarter inch plate steel forms the bottom, front and rear walls of a U-shaped open sided saddle for mounting therewithin a 9 H.P. four cycle gasoline engine, the bottom of said saddle being clamped along its front edge to a 30 inch fixed axle on opposite ends of which are freely rotatable 14 inch diameter ballon tired wheels. Rectangularly rigidly connected to upper ends of said spaced rear and front engine saddle walls and continuing 46 inches forwardly therefrom is an inverted 4 inch square U-cross section sheet metal channel providing a drill supporting tongue for the tool while also housing a main shaft, the rear end of which journals in a self-aligning bearing fixed rockably on said rear engine saddle wall. Behind said wall said main shaft has a driven pulley fixed thereon which is belt driven from an engine shaft drive pulley when a manually controlled idler roller clutch means tightens the connecting belt.
申请公布号 US4077480(A) 申请公布日期 1978.03.07
申请号 US19760703459 申请日期 1976.07.08
申请人 GROUND HOG, INC. 发明人 CARLSON, PAUL R.;CARLSON, RICHARD L.
分类号 E21B19/087;(IPC1-7):E21C11/02 主分类号 E21B19/087
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