EP 0080802 A1 19830608 - A machine for cutting a trench in rock.
Title (en)
A machine for cutting a trench in rock.
Title (de)
Grabenfräse für Gestein.
Title (fr)
Machine pour fraiser une tranchée dans un rocher.
Publication
Application
Priority
GB 8130943 A 19811014
Abstract (en)
The invention provides a machine for cutting a trench in rock wherein, in order to avoid cutter head bounce if the cutter were mounted at the end of a boom and to thereby provide an improved cutting action, a telescopic control arm (25) is secured to the end of the boom (11) adjacent to the cutting head (21). The boom (11) is pivotally secured to a trailing crawler chassis (3) and the telescopic control arm (25) is secured to a forward crawler chassis (5).
IPC 1-7
IPC 8 full level
E02F 3/20 (2006.01); E02F 5/08 (2006.01); E02F 9/08 (2006.01); E02F 9/20 (2006.01); E02F 3/18 (2006.01); E02F 5/02 (2006.01)
CPC (source: EP)
E02F 3/181 (2013.01); E02F 3/20 (2013.01); E02F 9/0808 (2013.01); E02F 9/20 (2013.01)
Citation (search report)
- [Y] DE 2164116 A1 19730705 - HOHENSCHLAEGER ALOIS
- [Y] CH 239498 A 19451031 - GRANDS TRAVAUX SA ENTREPRISE D [CH]
- [Y] US 3308564 A 19670314 - ALFRED PERRY, et al
- [Y] US 3526047 A 19700901 - ROESSLER EDMUND, et al
- [Y] US 3711970 A 19730123 - BRIAR G
- [Y] DE-B-R210 III/45a (RATHJENS)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 82305455 A 19821014