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:
Jun. 02, 1992
Filed:
Sep. 25, 1991
Applicant:
Inventors:
Thomas J Schmitt, Jefferson County, KY (US);
Claude R Wallick, Jr, Jefferson County, KY (US);
Assignee:
Emerson Electric Co., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E06C / ;
U.S. Cl.
CPC ...
182213 ;
Abstract
A rung lock assembly for selectively and releasably locking a pair of adjacent rungs of relatively slidable fly ladder and base ladder sections of an extensible ladder including a rung lock frame pivotally mounted within the fly ladder section to be normally urged into engagement with adjacent rungs of the ladder sections and a pulley and cable system cooperative with the rung lock frame to release and move the same away from such engagement for relative slidable movement of the ladder sections.