Friction washer for securing a wire mesh screening onto the prot

Details Friction washer for securing a wire mesh screening onto the prot Friction washer for securing a wire mesh screening onto the prot

1986-07-28

1988-04-26

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Rock or earth bolt or anchor

405288, 411533, E21D 1100, E21D 2100

Patent

active

047401117

ABSTRACT:
A friction washer for securing a wire mesh screening on the protruding end of rock bolts inserted into the wall of a mine is disclosed. The friction washer has a central opening with teeth set into the inside diameter thereof and adapted to engage the end of the bolts. A plurality of upstanding tabs are located on one face of the friction washer and radially spaced from the center of the central opening at a distance substantially equal to half the outside diameter of a hollow tube so as to allow the tabs to fit over the end of the hollow tube for holding the washer during installation on the protruding end of the rock bolt.

REFERENCES:
patent: 3181584 (1965-05-01), Borowsky
patent: 3362737 (1968-01-01), Cobb
patent: 3504498 (1970-04-01), Triplett
patent: 4293243 (1981-10-01), Graybeal et al.
patent: 4325657 (1982-04-01), Elders
patent: 4371288 (1983-02-01), Borca

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