Hydraulic and earth engineering – Earth treatment or control – Chemical
Patent
1988-10-28
1990-04-03
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Chemical
405260, 405259, 411 51, 411 72, E21D 2100
Patent
active
049135937
ABSTRACT:
A two-piece, malleable iron, expansion anchor for installation in a relatively small (about 1") diameter bore hole with a conventional size (5/8") bolt. The four-prong expansion shell, camming plug, and individual shell leaves each have unique features contributing to the effectiveness of the anchor when used either with or without a resin grouting mixture. The slots or spaces between adjacent shell leaves include upper and lower portions, each of constant width, the lower portion being wider than the upper portion, whereby the leaves are narrower in the area where they are bent outwardly from the closed ring at the base than in the area where they are compressionally engaged between the plug and the hole wall. Upper portions of the inner leaf surfaces taper toward the shell axis and the side edges of such surfaces taper toward one another from the upper, free ends of the leaves toward the lower ends. An axial rib extends outwardly from the surface of the camming plug over its entire length. A first group of gripping teeth or serrations on the outer leaf surfaces near the lower ends of the leaves are deeper than a second group outwardly adjacent the plug contact area.
REFERENCES:
patent: 3188815 (1965-06-01), Schuermann et al.
patent: 3381567 (1968-05-01), Askey
patent: 3474898 (1969-10-01), Montgomery
patent: 4162133 (1979-07-01), Clark et al.
patent: 4403894 (1983-09-01), Clark
patent: 4534679 (1985-08-01), White et al.
patent: 4764055 (1988-08-01), Clark et al.
Clark Carl A.
Wright Raymond L.
McBee J. Russell
McGuire Charles S.
Taylor Dennis L.
The Eastern Company
LandOfFree
Mine roof expansion anchor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mine roof expansion anchor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mine roof expansion anchor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1354265