초록 ▼

An anchor eye-bolt for use in strengthening a mine roof as well as for supporting mine installation below the roof. The anchor eye-bolt of the present invention comprises broadly an elongated stem having on a first end thereof a threaded portion for engaging into an expansion-type anchor shell, and

An anchor eye-bolt for use in strengthening a mine roof as well as for supporting mine installation below the roof. The anchor eye-bolt of the present invention comprises broadly an elongated stem having on a first end thereof a threaded portion for engaging into an expansion-type anchor shell, and a polygonal bolt head forming a second end thereof. The polygonal bolt head comprises a circular pressure bearing surface on a first side thereof adjoining the stem, and an eyed projection extending from a top surface thereof. The circular pressure bearing surface preferably has a diameter as large as an across-corner dimension of the polygonal bolt head. The eyed projection preferably has a width similar to an across-flat dimension of the polygonal bolt head. A thickness of the eyed projection is preferably substantially a same dimension as a diameter of the stem. In another aspect of the anchor eye-bolt of the present invention, there is provided a tension washer used in combination with that anchor eye-bolt. The tension washer mounts on the anchor eye-bolt against the pressure bearing surface of the polygonal bolt head. The tension washer has a bent portion and a hole through that bent portion for receiving an attachment of a cord member used in strengthening a mine roof.

대표청구항 ▼

[ I claim:] [1.] An anchor eye-bolt for use in supporting mechanical equipment under a mine roof, said anchor eye-bolt comprising:an elongated stein having a threaded portion on a first end thereof for engagement into an anchoring shell, and a bolt head integrally forming a second end thereof, said

[ I claim:] [1.] An anchor eye-bolt for use in supporting mechanical equipment under a mine roof, said anchor eye-bolt comprising:an elongated stein having a threaded portion on a first end thereof for engagement into an anchoring shell, and a bolt head integrally forming a second end thereof, said bolt head having standard dimensions relative to a diameter of said elongated stem, said bolt head also having a pressure bearing surface on a first side thereof adjoining said stem, andan eyed projection extending axially relative to said stem from a second side of said bolt head opposite said first side, said eyed projection having a circular opening therein with two radial slots extending from said circular opening and away from said bolt head;such that said anchor eye-bolt is usable for compressing a roof strata of said mine roof and said circular opening with said two radial slots are usable for anchoring both ends of a chain for supporting said mechanical equipment.