Hydraulic roof-support frame

Details Hydraulic roof-support frame Hydraulic roof-support frame

1979-07-02

1981-05-12

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405291, E21D 1702

Patent

active

042668921

ABSTRACT:
The roof-engaging assembly of a support frame for a mine roof comprises a main beam having a cantilever extension pivoted to the main beam by pins. In order to pivot the cantilever extension through an angle of about 180.degree.-200.degree. between a stowed position and an operative position, a link is pivoted at one point to the main beam and is pivoted at another point to one end of a double acting jack. The other end of the jack is pivoted to the main beam so that, by extending or retracting the jack, the link member pivots one way or the other. The cantilever extension has a pin which runs in a slot in the link member, the arrangement being such that pivoting of the link member by the jack produces pivoting of the cantilever extension through a much larger angle, e.g., double the angle.

REFERENCES:
patent: 3732699 (1973-05-01), Stevenson

Affiliated with

Also associated with

Rating

Hydraulic roof-support frame does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2044128