| 摘要 |
PCT No. PCT/AU93/00139 Sec. 371 Date Oct. 3, 1994 Sec. 102(e) Date Oct. 3, 1994 PCT Filed Apr. 1, 1993 PCT Pub. No. WO93/19580 PCT Pub. Date Oct. 14, 1993.A coring apparatus for forming a plurality of vertical cores or bores in the ground surface which includes a mobile wheeled frame supporting a plurality of rotatably driven, vertically moveable drilling members which are moved between a lowered operative position and an elevated inoperative position in which the drilling members are oriented above the ground surface. The drilling members are mounted on a movable frame component that is pivotally supported from the wheel frame at one end thereof with the opposite end of the moveable frame component supporting the drilling members and connected with crank members powered from a drive motor to raise and lower the moveable frame component and the drilling members. The movable frame component is connected to the mobile frame for longitudinal movement and is provided with a supporting foot that advances the coring apparatus as the drilling members are elevated to an inoperative position and then lowered to an operative position with the eccentricity of the crank means moving the mobile chassis forwardly as the drilling members are moved between operative and inoperative positions. |
