Bruce A Waddell

US Patent:

42024188, May 13, 1980

Filed:

May 1, 1978

Appl. No.:

5/901561

Inventors:

Bruce A. Waddell - Seattle WA

Assignee:

The Robbins Company - Seattle WA

International Classification:

E21B 912

US Classification:

175361

Abstract:

Roller cutters are mounted onto a cutterhead from the rear side of the cutterhead. A load transfer block is insertable between a stator portion of each cutter and a generally forwardly directed load-carrying surface on the cutter-head frame. Loads imposed on the roller cutter during boring are transmitted rearwardly from the stator to the load transfer block, and from the load transfer block to the cutterhead frame.

US Patent:

45484422, Oct 22, 1985

Filed:

Dec 6, 1983

Appl. No.:

6/558784

Inventors:

David B. Sugden - Tasmania, AU
Bruce A. Waddell - Seattle WA
James P. Kindsvater - Everett WA
Robert B. Moffat - Federal Way WA

Assignee:

The Robbins Company - Kent WA

International Classification:

E21C 4100
E21C 4700

US Classification:

299 10

Abstract:

A first mobile mining machine for cutting mining tunnels in hard rock, which includes a horizontally swinging wheel-like cutterhead assembly mounted on a crawler and base frame assembly. The cutterhead assembly consists of a transverse horizontal axis wheel-like drum on which are multiple peripherally mounted rolling cutter units. A second mobile mining machine for cutting mining tunnels in hard rock, which includes a horizontally swinging and vertically ranging wheel-like cutterhead assembly mounted on a crawler and base frame assembly. The cutterhead assembly consists of a transverse horizontal axis wheel-like drum on which are multiple peripherally mounted rolling cutter units. A method of cutting mining tunnels in hard rock which includes the steps of providing a wheel-like cutterhead assembly for cutting the hard rock, rotating the cutterhead assembly about its horizontal axis, plunging the rotating cutterhead forward into the hard rock, sweeping the rotating cutterhead assembly sideward in a first horizontal direction through the hard rock, plunging the rotating cutterhead forward into the hard rock, then sweeping the rotating cutterhead sideward in the other horizontal direction, and then repeating the last four steps.