Tunnel-drilling truck

Details Tunnel-drilling truck Tunnel-drilling truck

1975-01-14

1976-05-18

Purser, Ernest R.

Tool driving or impacting

With vehicle support for drive

Drive structure moved to nonuse position for transport

173 43, 173 52, 248 13, E21C 1102

Patent

active

039571246

ABSTRACT:
A truck provided with drill units to drill the end wall of a tunnel under excavation, this truck being characterized by having a support for the drill units, which is pivoted about a transverse axis relative to the vehicle body to provide adjustment of the inclination of the support in relation to the inclination of the end wall to be drilled, to allow adjustment of the overall height of the truck for tunnels of different heights, and to provide a better load distribution to allow faster travel. This support is pivotally connected to provide automatic and constant aiming of the drill units in parallel rearwardly pointing relationship.

REFERENCES:
patent: 2026627 (1936-01-01), Gilman
patent: 2069830 (1937-02-01), Hirschberg
patent: 2614807 (1952-10-01), Curtis
patent: 3729056 (1973-04-01), Paurat
patent: 3768574 (1973-10-01), Long
patent: 3815690 (1974-06-01), Cooper

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