Hydraulic and earth engineering – Foundation – Columnar structure
Patent
1996-03-08
1998-06-30
Taylor, Dennis L.
Hydraulic and earth engineering
Foundation
Columnar structure
175 19, 173184, 405231, 405303, E02D 1100, E21B 702, E21B 1102, E21C 1100
Patent
active
057723621
ABSTRACT:
The movement of relocatable racing rails (10) by manual labor involves the extraction of poles (16) from the ground and re-insertion of each pole a fixed distance from its adjacent pole along the path of the new location of the racing rail, thereby resulting in a time consuming and very labor intensive operation wherein inaccuracies in placement of the poles can result in misfits of the relocatable rails over the poles, whereby readjustment is often required. A transportation apparatus (28) is provided for carrying poles (16) and measuring a fixed distance between the last pole and a pole driver mechanism (32) for driving the next pole (66) into the ground. The pole driver is allowed to move relative to the transportation apparatus as the apparatus moves along the ground, but the relative movement is arranged so as to maintain a fixed distance to the last pole for a time shortly before, during and after the pole driver mechanism is actuated to drive a pole into the ground. The pole driver mechanism is attached to the transportation apparatus by a parallelogram arrangement (42, 56, 58) which allows the required relative movement. Sensor (72) mounted between the transportation apparatus and the pole drive mechanism detects the relative movement and a rate of travel of the transportation apparatus is provided so that as the pole driver mechanism becomes more vertical with respect to the transportation apparatus, the speed across the ground is reduced and, if necessary, the transportation apparatus is stopped.
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Aclis Pty Ltd
Taylor Dennis L.
LandOfFree
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