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US 5,683,182 AGranted
High pressure bag
AssigneesNampak Products Limited, H L & H Timber Products (Proprietary) Limited
InventorRobin Ian Moore
Life of this patent
Estimating the term…
Abstract
A high pressure bag for pre-stressing a support pack in an underground mine has a fluid impervious liner and three tubular envelopes. The liner is located in the first envelope with end portions of the first envelope and edge strips of the liner folded over underneath the first envelope. The first envelope with the liner therein are in the second envelope, with end portions of the second envelope folded over on top of the second envelope. The second envelope is located within the third envelope which has opposed edges stitched closed. The liner has a nozzle which extends through openings in the envelopes.
Claims60
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and has an opening for the nozzle;
- with the liner being located within the first envelope with the nozzle extending through the opening;
- with edge portions of the liner adjacent the first and second edges folded over;
- a second envelope that is also of a flexible material, the first envelope with the liner therein being located within the second envelope, the second envelope also having an opening through which the nozzle extends;
- and
- a third envelope which is also of a flexible material and also has an opening through which the nozzle extends, the second envelope, with the liner and the first envelope therein, being located within the third envelope, the third envelope having flaps which are folded over edges of the second envelope extending transversely to the first and second edges of the liner.
5 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and has an opening for the nozzle;
- with the liner being located within the first envelope with the nozzle extending through the opening;
- with edge portions of the liner adjacent the first and second edges folded over;
- a second envelope that is also of a flexible material and which also has an opening through which the nozzle extends;
- and
- a third envelope which is also of a flexible material and also has an opening through which the nozzle extends, the first envelope, with the liner therein, being located within the third envelope, which is located within the second envelope, the third envelope having flaps which are folded over edges of the first envelope extending transversely to the first and second edges of the liner.
5 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- and
- a first envelope which has an opening for the nozzle and which is of a flexible woven material, having warp and weft threads;
- with the liner being located within the first envelope with the weft threads extending parallel to the first edge of the liner and with the nozzle extending through the opening;
- and
- with edge portions of the liner adjacent the first and second edges folded over.
4 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and which has an opening for the nozzle;
- with the liner being located within the first envelope with the nozzle extending through the opening in the first envelope;
- with edge portions of the liner adjacent the first and second edges folded over and the first envelope having a double layer flap folded over each of the folded over edge portions of the liner;
- a second envelope which also has an opening for the nozzle, the first envelope being located within the second envelope, the nozzle also extending through the opening in the second envelope, the second envelope being of a flexible woven material, having warp and weft threads, with the weft threads extending parallel to the first edge of the liner.
3 more elements
A high pressure bag which includes
- a fluid impervious rectangular liner having a first edge and an opposed second edge;
- a filling nozzle fast with a wall of the liner close to the first edge thereof;
- a first envelope which is of a flexible material and which has an opening for the nozzle;
- with the liner being located within the first envelope with the nozzle extending through the opening in the first envelope;
- and
- with edge portions of the liner adjacent the first and second edges folded over and the first envelope having a double layer flap folded over each of the folded over edge portions of the liner;
- a second envelope which is also of a flexible material and which also has an opening for the nozzle, the first envelope being located within the second envelope with the nozzle extending through the opening in the second envelope, and
- a third envelope which also has an opening through which the nozzle extends, the third envelope being of a flexible woven material, having warp and weft threads, with the weft threads extending transversely to the first edge of the liner.
5 more elements
Dependencies are inferred from the claim text.