Patent · US Active

Tunneling apparatus

US9506344B2 · kind B2 · utility

2Cited by

16References

23Claims

0Family size

Assignee

Vermeer Manufacturing Company · US

Inventors

Stuart Harrison · Queenscliff, AU
Edwin Spoelstra · Leighton, US
Nathan Meyer · Madison, US

Key dates

Filing date	May 31, 2012
Grant date	Nov 29, 2016
Priority date	—
Expiry date	Nov 19, 2032

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D9/02
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A tunneling apparatus includes a drill head and a steering shell. The drill head includes a main body having a distal end and an oppositely disposed proximal end. The steering shell is disposed at the distal end of the drill head and is movable relative to the main body of the drill head. The drill head includes structure that assists in maintaining a precise line.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.