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US 2025/0101869 A1Published application
Support prop
AssigneeMsp Mine Support Products (Pty) Ltd
InventorChristian Engelstoft NISSEN
Life of this patent
Estimating the term…
Abstract
A support prop which includes a cylindrical aluminium liner which is externally reinforced with a shell made from a composite material, an aluminium plunger with a seal which engages with an inner surface of the liner, a filler valve through which a volume inside the liner, adjacent the seal, in use is pressurized with a fluid, and a pressure relief valve which in use allows fluid under pressure to escape from the volume as the plunger is forced into the liner.
Claims6
A support prop, comprising:
- an elongate cylindrical body with a first end which is sealed;
- an opposing second end which is open;
- a bore and a wall which bounds the bore;
- and wherein the wall includes an inner metallic liner which faces the bore and an outer shell which is made from a composite material and which surrounds and reinforces the liner.
1 more element
A support prop, comprising:
- a cylindrical aluminium liner which is externally reinforced with a shell made from a composite material;
- an aluminium plunger with a seal which engages with an inner surface of the liner;
- a filler valve through which a volume inside the liner, adjacent the seal, in use, is pressurized with a fluid;
- and a pressure relief valve which in use allows fluid under pressure to escape from the volume as the plunger is forced into the liner.
1 more element
Dependencies are inferred from the claim text.