Title: Tunnel boring machine with dual support members

Abstract: A tunnel boring machine comprising a rotary cutterhead assembly, a cutterhead support assembly on which the cutterhead assembly is mounted, a gripper assembly for gripping the wall of the tunnel, and a pair of elongate support members connecting the cutterhead support assembly and the gripper assembly. The support members each have a torque reaction end connected either to the gripper assembly or to the cutterhead support assembly. Apparatus associated with the torque reaction ends prevents pivotal movement thereabout of the support members in the plane perpendicular to the plane in which the support members lie.

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Inventors: Winberg, Douglas F.
Dyer, Norman D. (Beaumont, TX, US)

Application Number: 430191
Filing Date: 1974-01-02
Publication_date: 1976-05-18
Assignee:
Primary Class(es): 299/31 299/56
Other Classes:
US Patent Ref:

3418022	Dec, 1968	Peterson	299/31.
3459452	Aug, 1969	Schnabe, Jr.	299/31.
3584918	Jun, 1971	Gaglione	299/31.
3598445	Aug, 1971	Winberg	299/31.
3776595	Dec, 1973	Winberg	299/31.

Other Refs: 1,758,165

Jan, 1971	DT

Primary Examiner: Purser, Ernest R.
Assistant Examiner: Pate III, William F.
Attorney: