Roof-support distancing apparatus

Hydraulic and earth engineering – Earth treatment or control – Shoring – bracing – or cave-in prevention

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

E21D 1544

Patent

active

043302262

ABSTRACT:
The invention is concerned with apparatus for maintaining a set "between-centers" distance between the elements of self-advancing mine-roof supporting means for long-wall mining, the support means having at least two elements connected via connecting means so that they can pivot to a limited extent with respect to an abutment which, in use, extends substantially parallel to the long-wall face, the connecting means of at least one element being constructed as a drive means, in which the portions of the abutment connected to the respective connecting means are interconnected so that their length can be varied, and a guide lever is pivoted to the connecting means of at least one element and to an abutment portion connected to an adjacent element so that the two places at which the lever is pivoted and the place at which the connecting means of the first-mentioned element are connected to the abutment lie at the corners of a triangle.

REFERENCES:
patent: 3434292 (1969-03-01), Heyer
patent: 3576110 (1971-04-01), Warns
patent: 4169689 (1979-10-01), Weirich et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Roof-support distancing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Roof-support distancing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roof-support distancing apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-484580

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.