Roof bolt with plastic sleeve and mechanical anchor

Details Roof bolt with plastic sleeve and mechanical anchor Roof bolt with plastic sleeve and mechanical anchor

1990-04-16

1991-10-01

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405260, 411 32, 411 42, E21D 2002

Patent

active

050528610

ABSTRACT:
A mine roof anchor assembly usable with a quick-setting resin cartridge inserted into a mine roof opening is disclosed and includes a partially threaded elongated bolt having a first end, a mechanical anchor, such as a bail-type or mechanical expansion type, at a threaded end, and a mixing element, such as a coil, having an upper end attached to the bolt and positioned external of and surrounding a length along the bolt. The bolt receives a frangible hollow plastic sleeve which is positioned about the threaded portion and extends below the mechanical anchor toward the bolt head. A stopping element attaches to the bolt below the mechanical anchor toward the first end, whereby the frangible sleeve is sandwiched between the stopping element and the mechanical anchor. A shaft can also be coupled to the first end extending the length of the anchor assembly.

REFERENCES:
patent: 2765834 (1956-10-01), Poupitch
patent: 2952129 (1960-09-01), Dempsey
patent: 4100748 (1978-07-01), Hansen
patent: 4193715 (1980-03-01), Vass
patent: 4194858 (1980-03-01), Evans
patent: 4275975 (1981-06-01), Morgan
patent: 4483645 (1984-11-01), White et al.
patent: 4556344 (1985-12-01), White
patent: 4601614 (1986-07-01), Lane et al.
patent: 4655645 (1987-04-01), Hipkins, Sr. et al.
patent: 4664561 (1987-05-01), Frease
patent: 4690597 (1987-09-01), Liebig
patent: 4861198 (1989-08-01), Stankus
patent: 4865489 (1989-09-01), Stankus et al.

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