A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Laddertube for underground raises
A laddertube (10) for an underground raise is described having an elongate tube (12) made of a suitably rigid plastics material and adapted to be received in the raise. The tube (12) has a series of steps (14) moulded into an interior side wall thereof so as to form a ladder extending substantially the full length of the tube (12). Part only of the circumference of one end of the tube (12) is formed with an inside offset male edge (30) whereas the remainder of the one end is formed with a non-offset male edge (32). Part only of the circumference of the other end of the tube is formed with an outside offset female edge (34) whereas the remainder of the other end is formed with a non-offset female edge (36). In use, the inside offset male edge (30) can be received within the non-offset female edge (36) on the other end of an adjoining tube of identical design, and the outside offset female edge (34) can be received around the non-offset male edge (32) on the one end of the adjoining tube when the tubes are joined end to end. Amongst other advantages, this ensures that part of an internal wall of adjoining tubes is substantially smooth in the region of the join when the tubes are joined end to end.
Laddertube for underground raises
A laddertube (10) for an underground raise is described having an elongate tube (12) made of a suitably rigid plastics material and adapted to be received in the raise. The tube (12) has a series of steps (14) moulded into an interior side wall thereof so as to form a ladder extending substantially the full length of the tube (12). Part only of the circumference of one end of the tube (12) is formed with an inside offset male edge (30) whereas the remainder of the one end is formed with a non-offset male edge (32). Part only of the circumference of the other end of the tube is formed with an outside offset female edge (34) whereas the remainder of the other end is formed with a non-offset female edge (36). In use, the inside offset male edge (30) can be received within the non-offset female edge (36) on the other end of an adjoining tube of identical design, and the outside offset female edge (34) can be received around the non-offset male edge (32) on the one end of the adjoining tube when the tubes are joined end to end. Amongst other advantages, this ensures that part of an internal wall of adjoining tubes is substantially smooth in the region of the join when the tubes are joined end to end.
Laddertube for underground raises
DURKIN STEVEN PETER (author)
2017-05-11
Patent
Electronic Resource
English
IPC:
E21F
Sicherheitsvorrichtungen, Förderung, Auffüllen oder Bergversatz, Rettungswesen, Bewetterung oder Entwässerung in oder von Gruben oder Tunnels
,
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
/
E02D
FOUNDATIONS
,
Gründungen
/
E06C
LADDERS
,
Leitern
/
E21D
SHAFTS
,
Schächte
Machine-bored tunnel and raises -- Their application to underground mining
| Engineering Index Backfile | 1967
| IuD Bahn | 2005
British Library Online Contents | 2007
Online Contents | 2008