The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 1977
Filed:
Apr. 20, 1976
Raymond A Hanson, Spokane, WA (US);
Other;
Abstract
A shearing excavator including a unique blade assembly for removing earth in successive layers from a substantially upright face. The successive earth layers are removed by pulling a blade assembly along the full length of the face. The blade assembly is connected to a longitudinal framework that provides support for an earth receiving and transporting conveyor. This conveyor receives material deflected from the blade assembly and directs it to a discharge end adjacent one end of the excavator framework. A lateral conveyor receives the discharged material and moves it to a remote location for further processing. The blade assembly includes an upright first blade with a substantially upright cutting edge. The bottom end of the upright cutting edge is located at a point above the lower edge of the face, leaving a portion thereof to be removed by a second blade. The second blade is horizontally inclined and includes a substantially horizontal forward cutting edge that is located rearward of the first upright cutting edge (with respect to a forward direction travel of the blade assembly). The second blade is inclined upwardly from its cutting edge which is located at the loweredge of the face. The second blade cuts through the earth along the face that remains below the bottom edge of the upright blade.