Hydraulic and earth engineering – Earth treatment or control – Rock or earth bolt or anchor
Patent
1983-05-04
1985-06-18
Husar, Cornelius J.
Hydraulic and earth engineering
Earth treatment or control
Rock or earth bolt or anchor
411 33, 411537, E21D 2100, F16B 214, F16B 4300
Patent
active
045238804
ABSTRACT:
A tie rod assembly for a rock borehole anchor includes a tension rod 3 having a plurality of wedge shaped spreading bolts 10 at its lower end surrounded by spreading sleeve 20 segments 21, and a sleeve 40 on its upper end threaded to a tension nut 60 which bears against a ground support or anchor plate 70 upon installation and tightening. The sleeve 40 mates with the tension rod via saw tooth configured circumferential ridges or fins 45, 46 having increasing inclination angles, to thereby provide for a constant force transmission per unit of tooth length. The tension nut and anchor plate have complementarily configured spherical bearing surfaces 65, 77, and the ground engaging lower area of the anchor plate has fracturable webs 75 to accommodate surface irregularities and projections.
REFERENCES:
patent: 2879686 (1959-03-01), Lewis
patent: 3469407 (1969-09-01), Kovacs
patent: 3837258 (1974-09-01), Williams
patent: 4011787 (1977-03-01), White et al.
patent: 4112693 (1978-09-01), Collin et al.
patent: 4347020 (1982-08-01), White et al.
patent: 4362449 (1982-12-01), Hlinsky
"New Parts and Materials--Self Aligning Lock Nut" Machine Design, Jan. 19, 1961, vol. 33, No. 2.
H. Weidmann AG
Husar Cornelius J.
Stodola Nancy J.
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