Self-advancing support and control means therefor

Details Self-advancing support and control means therefor Self-advancing support and control means therefor

1983-10-13

1985-01-01

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405291, 405293, E21D 2300

Patent

active

044914415

ABSTRACT:
A self-advancing support, suitable for use in mines, includes a cantilever which is extendible and retractable with respect to a main portion of the support, and a sprag which is so mounted on said cantilever as to be extendible and retractable with respect thereto. Means are provided for advancing the support with respect to a mineral face and further means are provided for ensuring that during advance of the support the sprag is maintained in an extended, mineral-face-engaging, condition while the main portion is moved with respect to the cantilever in the direction towards the face, thereby reducing cantilever extension.

REFERENCES:
patent: 4310268 (1982-01-01), Bower et al.
patent: 4386878 (1983-06-01), Martinko et al.

Affiliated with

Also associated with

Rating

Self-advancing support and control means therefor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-advancing support and control means therefor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-advancing support and control means therefor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-576127