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US 4,067,201 AGranted
Device for erecting a segmented tunnel wall lining
OwnerRichard Lovatinventor
Life of this patent
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Abstract
A device for positioning segments to line a tunnel wall. An axially rotatable drive shaft carries at one end of an articulated arm with pivotably connected upper and lower arm members. A jack interconnects the two arms intermediate their ends. The upper arm member is pivotably connected at its free end to the drive shaft on an axis normal both to the shaft and to the upper arm member, and the arm lies in a plane through the normal axis. Preferably a shoe is detachably connectable to the lower arm member and to a segment to be positioned against the tunnel wall.
Claims8
A device for positioning segments to form a tunnel wall lining, comprising:
- drive means having an axially rotatable shaft, and means to support the drive means whereby the drive shaft is substantially coincident with the axis of the tunnel;
- an articulated arm having an upper arm member and a lower arm member pivotably connected therewith, the upper arm member being pivotably connected to the drive shaft on an axis normal to the shaft and to the upper arm member, the arm lying in a plane through said normal axis;
- extendable means interconnecting the lower and upper arm members intermediate their ends;
- and
- means on the free end portion of the lower arm member to attach a segment releasably thereto.
2 more elements
Dependencies are inferred from the claim text.