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:
Apr. 24, 2012
Filed:
Dec. 04, 2009
Roy Lee Robertson, Jr., Delbarton, WV (US);
Roy Lee Robertson, Jr., Delbarton, WV (US);
Other;
Abstract
A mine roof monitoring apparatus has at least two contact members. At least one contact member maintains contact with the roof of a mine shaft. At least one contact member maintains contact with a floor of the same mine shaft. A motion monitoring apparatus monitors the relative motion between the two contact members, and a flag on the motion monitoring apparatus changes position, when a predetermined amount of motion occurs between the two contact members. This indicates that the roof of the mine shaft has subsided enough to move the respective contact member.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile