Shielding apparatus

Details Shielding apparatus Shielding apparatus

1993-06-04

1994-12-06

Neuder, William P.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

175 19, 175 94, E21B 1100

Patent

active

053704797

ABSTRACT:
A shielding apparatus comprises a cylindrical shield body, a crankshaft supported by the shield body rotatably around the axis of the shield body, a plurality of rotors successively provided in the direction of the axis in a front region ahead of the shield body and a driving mechanism for rotating the crankshaft around the axis, wherein the rotors define the outer surface of an approximately conical or truncated conical shape in conjunction with each other, and the adjoining rotors are made eccentric with respect to the axis of the shield body in the different directions from each other.

REFERENCES:
patent: 3926267 (1975-12-01), Svirschevsky et al.
patent: 4230191 (1980-10-01), Svirschevsky
patent: 4624605 (1986-11-01), Akesaka
patent: 5031707 (1991-07-01), Gerasimenko et al.
European Search Report, Hector Fonseca, Aug. 20, 1993, Application No. EP 93 30 4172, (3 pages).

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