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:
Jan. 22, 2019
Filed:
Nov. 04, 2016
Applicant:
Jack Kennedy Metal Products & Buildings, Inc., Taylorville, IL (US);
Inventors:
William R. Kennedy, Taylorville, IL (US);
John M. Kennedy, Taylorville, IL (US);
Assignee:
Jack Kennedy Metal Products & Buildings, Inc., Taylorville, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E05F 15/616 (2015.01); E21F 1/12 (2006.01); E05F 15/63 (2015.01); E21F 1/10 (2006.01); E06B 3/36 (2006.01);
U.S. Cl.
CPC ...
E05F 15/616 (2015.01); E05F 15/63 (2015.01); E21F 1/10 (2013.01); E21F 1/12 (2013.01); E05Y 2201/624 (2013.01); E05Y 2900/60 (2013.01); E06B 3/36 (2013.01);
Abstract
A mine door system which includes a mine door having a door leaf, and a door-moving mechanism that articulates between a first configuration in which the mechanism applies a relatively smaller door-moving force to the door leaf and moves it at a first speed and a second configuration in which the mechanism applies a larger door-moving force to the door leaf and moves it at a second speed less than the first speed.