Drive shields for tunnel-driving apparatus

Details Drive shields for tunnel-driving apparatus Drive shields for tunnel-driving apparatus

1983-02-24

1984-11-13

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

405138, 405141, E01G 302, E21D 1900

Patent

active

044822707

ABSTRACT:
A drive shield for tunnel driving has a plurality of cutters supported for longitudinal displacement on a frame. The cutters are hollow and contain double-acting hydraulic rams used to displace the cutters and the frame. The rams are linked to the cutters via alignable connector shackles and detachable bolts. To connect the rams to the frame use is made of coupling pieces which have spigots engaging through shackles on the rams. The coupling pieces pass through slots in the cutters and are guided on the frame for displacement to release or mate the spigots with the shackles.

REFERENCES:
patent: 3866426 (1975-02-01), Lobbe
patent: 3998067 (1976-12-01), Fernandez
patent: 4112696 (1978-09-01), Jutte et al.
patent: 4334800 (1982-06-01), Stuckmann
patent: 4398845 (1983-08-01), Stuckmann et al.

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