Prestressing of mine props

Details Prestressing of mine props Prestressing of mine props

E - Fixed Constructions

21

D

E21D 15/59 (2006.01) E21D 15/00 (2006.01) E21D 15/30 (2006.01) E21D 15/51 (2006.01)

Patent

CA 2168077

The mine prop prestressing device (10) has a tube (12), a cup-shaped member (14) inside the tube which has a base (18) and a cylindrical side wall (20) fixed internally to the wall of the tube. A counter-member is also fixed to the tube in opposition to the cup-shaped member, and a valved inlet leads through the wall of the tube for the purpose of introducing a pressurised fluid into the tube between the base of the cup-shaped member and the counter-member. If the fluid is under sufficiently high pressure, the base of the cup-shaped member and the counter member are deformed apart from one another. The counter-member is typically in the form of an identical or similar cup-shaped member (14). The device (10) is a component part of a mine prop which includes a plunger (36, 38) inserted slidably into the tube so as to locate in a cup-shaped member. When pressurised fluid is introduced into the tube, the plunger is driven telescopically out of the tube.

Affiliated with

Also associated with

Rating

Prestressing of mine props does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Prestressing of mine props, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Prestressing of mine props will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1502377