초록 ▼

A portable anchor for tethering to on the shelf of a rock quarry includes an elongated lower post adapted into slip charge holes drilled in the quarry shelf, a stop plate connected to the post and rotatably resting on the shelf, and hook receiving means for connection of one end of a tether line tha

A portable anchor for tethering to on the shelf of a rock quarry includes an elongated lower post adapted into slip charge holes drilled in the quarry shelf, a stop plate connected to the post and rotatably resting on the shelf, and hook receiving means for connection of one end of a tether line that is connected at the other end to a harness or belt worn by the worker. A method for anchoring to said quarry shelf includes providing an anchor adapted to slip into the charge receiving holes formed in the shelf, and having a stop plate for positioning the depth of the anchor in the charge hole.

대표청구항 ▼

[ I claim:] [1.] An anchor adapted for use with a flexible tether line equipped with tether hook means for releasably anchoring to a rock structure having a vertically extending opening, said anchor comprising when in said position:an elongated post having a lower end portion for slidably inserting

[ I claim:] [1.] An anchor adapted for use with a flexible tether line equipped with tether hook means for releasably anchoring to a rock structure having a vertically extending opening, said anchor comprising when in said position:an elongated post having a lower end portion for slidably inserting into said opening and having an upper end portion securely connected to said lower end portion for rotation therewith;plate means securely connected to said post between said upper and lower end portions for rotation with said post, said plate means having a substantially flat lower-most surface extending generally perpendicular to said post for slidably engaging said structure; andhook receiving means securely connected to the upper end portion of said post for rotation therewith, said hook receiving means being adapted for receiving said tether hook means.