EP 0824633 B1 19990714 - PROP FOR USE IN UNDERGROUND MINING OR TUNNEL CONSTRUCTION
Title (en)
PROP FOR USE IN UNDERGROUND MINING OR TUNNEL CONSTRUCTION
Title (de)
AUSBAUSTÜTZE FÜR DEN UNTERTÄGIGEN BERG- ODER TUNNELBAU
Title (fr)
ETANCONS DESTINES A L'EXPLOITATION MINIERE SOUTERRAINE ET A LA CONSTRUCTION DE TUNNELS
Publication
Application
Priority
- DE 19514137 A 19950420
- EP 9601634 W 19960419
Abstract (en)
[origin: DE19514137A1] The invention concerns a prop, which can be filled with construction material, for use in underground mining or tunnel construction, the prop being designed to be braced against the roof by a hydraulic prop-extension device before it is filled. In order to simplify handling of such a prop and to give the prop early-bearing characteristics, the invention proposes that the prop-extension device is integrated in the prop and has a piston (4) which makes a seal with the inner wall of an outer tube (2) and which acts on an inner tube (3) to extend the prop. Located below the piston (4) in the outer tube (2) is a first chamber (5) into which a hydraulic fluid under pressure can be passed through a filling point to extend the prop. Located on the other side of the piston (4), opposite to the first chamber (5), is a second chamber (7) which can be filled with construction material through a separate filling point (8). The piston (4) is designed as a component which is separate from the inner tube (3) and, when the second chamber (7) is being filled, is displaced, under the weight of the construction material, across the first chamber (5), if necessary to the floor of the chamber.
IPC 1-7
IPC 8 full level
E21D 15/18 (2006.01); E21D 15/28 (2006.01); E21D 15/32 (2006.01); E21D 15/44 (2006.01)
CPC (source: EP US)
E21D 15/18 (2013.01 - EP US); E21D 15/285 (2013.01 - EP US); E21D 15/44 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
DE 29507774 U1 19950824; AU 5501096 A 19961107; AU 699612 B2 19981210; CN 1064734 C 20010418; CN 1185193 A 19980617; DE 19514137 A1 19961024; DE 19514137 C2 19970213; DE 59602449 D1 19990819; EP 0824633 A1 19980225; EP 0824633 B1 19990714; PL 179979 B1 20001130; PL 322873 A1 19980302; US 5921718 A 19990713; WO 9633336 A1 19961024; ZA 9510280 B 19960906
DOCDB simple family (application)
DE 29507774 U 19950420; AU 5501096 A 19960419; CN 96194106 A 19960419; DE 19514137 A 19950420; DE 59602449 T 19960419; EP 9601634 W 19960419; EP 96912021 A 19960419; PL 32287396 A 19960419; US 87564397 A 19970731; ZA 9510280 A 19951204