Retractable stacker guard
First Claim
1. In a protective overhead guard for a vertical lifting machine having a vertical mast and having a member guided by and vertically movable on said mast for load-lifting, the combination of an overhead guard pivotally connected to said mast for angular displacement relatively thereto, first means associated with said overhead guard and cooperating with said movable member for raising said overhead guard pivotally to a retracted position in response to downward motion of said movable member, second means associated with said overhead guard and cooperating with said movable member for lowering said overhead guard about said pivotal connection to a substantially horizontal operator-protective position rearwardly of said mast in response to upward motion of said movable member, and third means mounted on said machine for supporting said overhead guard at rest in said operator-protective position.
11 Assignments
0 Petitions
Accused Products
Abstract
A retractable overhead guard for use on vertical lifting machines which protects an operator of such equipment from falling objects or material. The overhead guard swings down into protective position in response to vertical load lifting movement by the machine and retracts to a non-obstructing position in response to load-lowering movement of the machine.
24 Citations
15 Claims
- 1. In a protective overhead guard for a vertical lifting machine having a vertical mast and having a member guided by and vertically movable on said mast for load-lifting, the combination of an overhead guard pivotally connected to said mast for angular displacement relatively thereto, first means associated with said overhead guard and cooperating with said movable member for raising said overhead guard pivotally to a retracted position in response to downward motion of said movable member, second means associated with said overhead guard and cooperating with said movable member for lowering said overhead guard about said pivotal connection to a substantially horizontal operator-protective position rearwardly of said mast in response to upward motion of said movable member, and third means mounted on said machine for supporting said overhead guard at rest in said operator-protective position.
- 14. In a protective overhead guard for an operator-controlled vertical load-lifting machine having a longitudinally movable vertical-lifting member, the combination of an overhead guard pivotally connected to said machine for angular displacement relatively thereto, first means associated with said overhead guard and cooperating with said member for raising said guard axially about said pivotal connection to a retracted substantially upright position in response to downward longitudinal motion of said member to a load-carrying position below the operator, and second means associated with said guard and cooperating with said member for lowering said guard axially about said pivotal connection to an operator-protective position in response to upward longitudinal motion of said member toward a load-carrying position above the operator.
Specification