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:
Oct. 05, 2021
Filed:
Jan. 12, 2021
Applicant:
Earthgrid Pbc, Berkeley, CA (US);
Inventor:
Troy Anthony Helming, Oakland, CA (US);
Assignee:
EarthGrid PBC, Berkeley, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 7/14 (2006.01); E21B 7/18 (2006.01); E21D 9/10 (2006.01); E21D 9/13 (2006.01);
U.S. Cl.
CPC ...
E21D 9/1073 (2013.01); E21B 7/14 (2013.01); E21B 7/18 (2013.01); E21D 9/1066 (2013.01); E21D 9/13 (2013.01);
Abstract
A plasma tunnel boring machine including a plurality of plasma torches on the cutting head, and a plurality of nozzles on the cutting head to provide a stream to cool an area while the plasma torches are active, and a tractor providing propulsion to the cutting head, the tractor to move the cutting head to cut a tunnel.