Stop lock assembly for a pivotal tower
AssigneeGeneral Crane Industries Limited
InventorYpe Bouma
Life of this patent
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Abstract
A stop lock assembly for a tower mounted on a platform and pivoted thereon whereby the tower is adapted to be raised from a horizontal position to a vertical, erected position. Stop members are operatively connected between the platform and the tower to limit the pivotal movement of the tower to the erected position and to hold portions of the platform and tower in alignment for the reception of locking pins extending therebetween for holding the tower in the erected position.
Claims5
In an erectable tower assembly wherein the base of the tower is pivotally connected to a support structure including a pair of vertically positioned laterally spaced side members, said tower base adapted to be raised from a substantially horizontal stored position within substantially the vertical height of the side members wherein the tower base is disposed horizontally therebetween to a vertical operative position, and having transversely extending pins inserted in aligned bores in the tower and support structure for holding the tower in the erected position, the improvement comprising, stop means operatively connected between the support structure side members and the base of the tower operative to limit the pivotal movement of the tower to the operative position and operative to pull portions of the side members of the support structure laterally toward and into the overlying contact with the sides of the tower and against an outwardly bending force on the side members to maintain the bores in alignment for the reception of the locking pins
Dependencies are inferred from the claim text.