Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention
Patent
1992-10-16
1994-04-12
Corbin, David H.
Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
4052591, 4053022, E21D 2000
Patent
active
053020561
ABSTRACT:
A pair of truss brackets are secured to the roof of an underground passage adjacent to opposing ribs of the passage. The truss brackets each include a roof engaging surface and a truss supporting arm member extending from the roof engaging surface. A pair of U-bolts are supported by the arm members of the truss brackets. Each arm member extends horizontally from the truss bracket to an enlarged end portion of the arm member. The U-bolt is horizontally movable in a vertically hanging position on the arm member and is restrained by the enlarged end portion from disengagement from the arm member. The U-bolts are pivoted on the truss brackets to a horizontal position for connection to truss members which are connected to each other and tensioned to apply an uplifting force to the roof. As the truss members are connected and tensioned, the U-bolts are retained for a range of horizontal movement on the arm members to facilitate adjustments in the position of the U-bolts on the truss brackets.
REFERENCES:
patent: 2667037 (1954-01-01), Thomas et al.
patent: 3427811 (1969-02-01), White
patent: 3505824 (1970-04-01), White
patent: 3509726 (1970-05-01), White
patent: 4274762 (1981-06-01), Johnson
patent: 4349300 (1982-09-01), Kelley
patent: 4395161 (1983-07-01), Wilson et al.
patent: 4498816 (1985-02-01), Korpela et al.
patent: 4596496 (1986-06-01), Tyrell et al.
patent: 4601616 (1986-07-01), Barish et al.
patent: 4630974 (1986-12-01), Sherman
patent: 4749310 (1988-06-01), White
patent: 4934873 (1990-06-01), Calandra, Jr.
patent: 5026217 (1991-06-01), Seegmiller
patent: 5176473 (1993-01-01), Seegmiller
"O-B Dead-End Hook", Ohio Brass Brochure, p. 118.3, Apr., 1977.
"Current Trends In Roof Truss Hardware", C. P. Mangelsdorf presented at the Second Conference On Ground Control in Mining, West Virginia University, Morgantown, W.V., Jul. 19-21, 1982.
"Mine Controls Bad Roof With Trusses Bolted On Cycle", Ken Barish, Coal Age, pp. 62-66, May, 1985.
Calandra, Jr. Frank
Frease Jerry E.
Kovacs Lajos
Stankus John C.
Stewart Eugene H.
Corbin David H.
Jennmar Corporation
Price, Jr,. Stanley J.
LandOfFree
Method and apparatus for supporting a mine roof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for supporting a mine roof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for supporting a mine roof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2094843