Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly
Patent
1978-04-17
1980-11-04
Leppink, James A.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
52117, 52123, 182 19, E04H 1234
Patent
active
042312000
ABSTRACT:
Method and apparatus for transporting a sectional tower to a selected location and for erecting the tower at the selected location is disclosed. The apparatus includes a mobile trailer bed on which the erection apparatus and the tower sections are transported. A frame is carried on the trailer bed which has racks on which a number of tower sections are stowed. A folding guide member is pivotally attached to the trailer frame and is rotatable to a stowed position during transportation and is rotatable to an upright position for guiding the tower during erection. A hoist is carried on the folding guide member for raising the tower sections through the guide member. A plurality of sheaves are attached to the support frame and upon a number of anchors symmetrically disposed at radially spaced locations relative to the support frame. Guy wires are attached to the uppermost tower section and are reeved with the sheaves associated with each anchor and are coupled to a winch. The uppermost tower section is raised to an elevated position on the guide member while additional lengths of guy wire are fed out under tension as the tower section is extended. The next succeeding tower section is connected to the uppermost tower section in end-to-end relation while maintaining the guy wires under tension. Thereafter, the assembled tower sections are raised through the upright guide member by applying a hoisting force to the lowermost tower section while feeding out additional lengths of guy wire under tension as the assembled tower is extended. These steps are repeated until each of the remaining tower sections have been assembled and the tower has been fully extended.
REFERENCES:
patent: 2857994 (1958-10-01), Sheard
patent: 2863531 (1958-12-01), Campbell
patent: 2998106 (1961-04-01), Aust
patent: 3150740 (1964-09-01), Rabeli
patent: 3606713 (1971-09-01), Ranquist
patent: 3684056 (1972-04-01), Penso
Leppink James A.
Raduazo Henry E.
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