EP 0153935 B1 19880107 - CIRCULAR HEADING MACHINE
Title (en)
CIRCULAR HEADING MACHINE
Publication
Application
Priority
GB 8322467 A 19830820
Abstract (en)
[origin: WO8501081A1] Circular heading machines for excavating tunnels by advancing a machine in step-wise fashion and erecting tunnel supports. The circular heading machine has an elongate machine body (10) at the forward end of which a forwardly directed cutter boom (11) is mounted, rams advance the machine body in step-wise fashion acting against grippers (23) and a profile ring (18, 18') limits peripheral movement of the cutter boom to form an accurate profile. A gathering apron (16) is provided at the forward extremity of the machine body. The cutter boom (10) is mounted on a sliding carriage (12) longitudinally movable on and independently of the machine body and a hood (17) overlies the apron. A cage structure (21) extends rearwardly from the hood structure and surrounds the boom cutter (11) and sliding carriage (12) and tunnel support erecting means (20) are provided externally of the cage structure, directly behind the hood structure. Thus the tunnel support structures are erected over the machine body rather than behind the machine, and also erection of the tunnel support structures takes place simultaneously with operation of the cutter. The hood (17) is a semi-circular member supported by hydraulic rams (17A) for height adjustment.
IPC 1-7
IPC 8 full level
E21D 9/08 (2006.01); E21D 9/10 (2006.01); E21D 11/40 (2006.01)
CPC (source: EP)
E21D 9/0875 (2016.01); E21D 9/102 (2013.01); E21D 11/403 (2013.01)
Designated contracting state (EPC)
BE CH DE FR GB LI NL
DOCDB simple family (publication)
WO 8501081 A1 19850314; AU 3310684 A 19850329; AU 570725 B2 19880324; BR 8407052 A 19850813; CA 1235150 A 19880412; DE 3468480 D1 19880211; EP 0153935 A1 19850911; EP 0153935 B1 19880107; ES 535264 A0 19850601; ES 8505761 A1 19850601; GB 2145134 A 19850320; GB 2145134 B 19870204; GB 8322467 D0 19830921; IN 161662 B 19880109; IT 1179051 B 19870916; IT 8467821 A0 19840817; IT 8467821 A1 19860217; JP S61500673 A 19860410; MX 160500 A 19900312; ZA 846294 B 19850424
DOCDB simple family (application)
GB 8400285 W 19840817; AU 3310684 A 19840817; BR 8407052 A 19840817; CA 461114 A 19840815; DE 3468480 T 19840817; EP 84903078 A 19840817; ES 535264 A 19840817; GB 8322467 A 19830820; IN 661DE1984 A 19840816; IT 6782184 A 19840817; JP 50313184 A 19840817; MX 20242484 A 19840817; ZA 846294 A 19840814