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:
May. 29, 1984
Filed:
Dec. 23, 1981
Friedrich W Paurat, 4230 Wesel, DE;
Roland Paurat, 4230 Wesel, DE;
Other;
Abstract
An excavating machine, e.g. for the recovery of coal and its removal from a coal seam comprises a rotary excavating tool which consists of a plurality of neutrally articulated coal augers which are driven and are disposed against the face to be excavated. The coal augers are provided with nozzles for spraying water or some other fast settling and spark-inhibiting liquid, the nozzles being controlled by a valve which opens flow to the nozzles only when at least one auger is disaligned from an adjustive auger as is required for coal cutting operations with such tools.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile