Fork lift truck with plate glass handling attachment
AssigneeDrexel Industries, Inc.
InventorGuido A. Donato
Life of this patent
Estimating the term…
Abstract
A fork lift truck is equipped with an attachment or fixture for handling a plate glass load. The truck is also equipped with a control system which includes sensing switch means for controlling automatically the operation of the truck to insure safe pick-up of the plate glass load. The control system also includes release switch means for preventing the truck from backing up, following deposit of a plate glass item at a storage area, until the plate glass load fixture has cleared the plate glass item.
Claims2
A fork lift truck having a truck drive-control circuit, a parking-brake control circuit, an elevatable mast-control circuit, and plate glass handling means, said plate glass handling means and control circuitry including:
- a. a plate glass handling fixture supported on said mast;
- b. said fixture having means at its upper and lower ends for capturing the upper and lower edge portions of a plate glass load;
- c. said upper capture means being movable pivotally between open and closed positions;
- d. spring-loaded feeler means supported on said fixture and adapted to be actuated by a plate glass load;
- e. switch means responsive to actuation of said feeler means for opening said drive-control circuit to disable said drive and for completing said parking-brake control circuit to apply said parking brake;
- f. means, operable after said fixture has been raised sufficiently to capture the lower edge portion of a plate glass load, for closing said drive-control circuit to reestablish said drive;
- g. means for moving said pivotal upper capture means to closed position to capture the upper edge portion of said plate glass load;
- and
- h. means, responsive to the closing of said upper capture means, for opening said brake-control circuit to release said parking brake.
Dependencies are inferred from the claim text.