Provision of support in underground mine workings
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
May 20, 2004
app pub date -
Nov 5, 2003
filing date -
Nov 15, 2002
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The invention provides a bag for spacing apart walls in an underground mine working, and including opposed load-bearing walls of flexible sheet material, each defining a substantially centrally located opening and an open-ended radial slot extending between and intersecting the central opening and outer periphery of the load-bearing wall, the openings and slots of the load-bearing walls being in register. There is an intermediate wall of flexible sheet material extending between the load-bearing walls and connected thereto substantially along the entire periphery of each load-bearing wall. A charging connector through the wall is for connection to a source of flowable substance under pressure for charging the bag therewith, to expand the bag by displacing the load-bearing walls away from each other. The invention also provides an installation and method which employ the bag to space the walls apart.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully