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:
Feb. 24, 1987
Filed:
Jan. 16, 1985
Applicant:
Inventors:
Friedrich W Paurat, 4230 Wesel 1, DE;
Roland Paurat, 4230 Wesel 13, DE;
Assignee:
Other;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ; E21C / ;
U.S. Cl.
CPC ...
299 64 ; 299 75 ; 299 18 ;
Abstract
A tunnel and gallery excavator comprises a ground contacting mechanism projecting from the front of a motorized drive and chassis and feeds debris to a conveyor. The digging arm has a pair of extendable supports attached to a yoke connected to the arm. The extendable supports are attached to and supported by the ground-contacting mechanism via pivots affording two degrees of freedom and an operating and adjusting device is provided for the extendable supports.
Paurat, Friedrich. (1987). Tunnel and gallery excavator (U.S. Patent No. 4645266). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4645266
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile