Mine roof supports

Details Mine roof supports Mine roof supports

1979-11-29

1981-05-19

Novosad, Stephen J.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405296, E21D 1544

Patent

active

042681936

ABSTRACT:
A mine roof support comprises a plurality of hydraulically extensible chock legs 5,6, articulated at upper ends thereof to one or more roof beams 3 and at lower ends thereof to one or more base members 1, a shield 9 pivotally connected to a rearward part of the base member 1 and also pivotally connected to a rearward part of the roof beam 3, with permanently pressurized rams 12 both located between a pair of laterally spaced chock legs 6 and one located to each side of the center line 19 of the support, the rams being mutually inclined with respect to the center line 19 and reacting via the shield 9 on the roof beam 3, and a pair of tie bars 11 located one at or towards each side of the support and both connected between the roof beam 3 and the shield 9.

REFERENCES:
patent: 3115754 (1963-12-01), Joseph
patent: 3324664 (1967-06-01), Allen
patent: 3357742 (1967-12-01), Dommann et al.
patent: 3383866 (1968-05-01), Groetschel
patent: 4012914 (1977-03-01), Wehner
patent: 4030308 (1977-06-01), Dudley et al.
patent: 4037419 (1977-07-01), Hill et al.

Affiliated with

Also associated with

Rating

Mine roof supports 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 supports, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mine roof supports will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1487160