Overwind Conveyance Drop Protection
AssigneeTechnological Resources Pty. Limited
InventorsRocky Lynn Webb, Fredric Christopher Delabbio
Life of this patent
Estimating the term…
Abstract
A hoist system for hoisting a conveyance from a mineshaft, comprising: a head frame mounted over the mineshaft; a hoist connected to the conveyance by an elongate flexible hoisting element so as to be operable to hoist the conveyance from the mineshaft by winding the hoisting element; an upper crash barrier located on the head frame so as to be engageable by the conveyance to prevent upward movement of the conveyance beyond the crash barrier in an overwind condition; and an upper conveyance retarder to retard upward movement of the conveyance as it approaches the crash barrier.
Claims25
A hoist system for hoisting a conveyance in the form of a skip from a mineshaft, comprising:
- a head frame mounted over the mineshaft;
- a hoist connected to the conveyance by an elongate flexible hoisting element so as to be operable to hoist the conveyance from the mineshaft by winding the hoisting element;
- an upper crash barrier located on the head frame so as to be engageable by the conveyance to prevent upward movement of the conveyance beyond the crash barrier in an overwind condition;
- and
- an upper conveyance retarder to retard upward movement of the conveyance as it approaches the crash barrier.
The hoist system for hoisting a conveyance in the form of a skip from a mineshaft, comprising:
- a head frame mounted over the mineshaft;
- a hoist connected to the conveyance by an elongate flexible hoisting element so as to be operable to hoist the conveyance from the mineshaft by winding the hoisting element;
- an upper crash barrier located on the head frame so as to be engageable by the conveyance to prevent upward movement of the conveyance beyond the crash barrier;
- and
- a conveyance catcher to prevent freefall downward movement of the conveyance along the mineshaft.
The hoist system as claimed in 11, wherein the jack catcher comprises pivoting jack catches on the headframe engageable with lugs on the conveyance to catch the conveyance against downward movement.
15-20. (canceled)
22-27. (canceled)
29-31. (canceled)
(canceled)
36-38. (canceled)
Dependencies are inferred from the claim text.