Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 29, 2015
0Patent Application Number
135840640
Date Filed
August 13, 2012
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A rigid structure such as a ladder is disclosed having rotating hinges that allow the ladder to fold up and/or be disassembled and assembled. The hinge or hinges can be provided between ladder sections with one ladder section having a male hinge element, and another having a female hinge element. A cam element provided with the female hinge element can be moved between an unlocked position in which the ladder sections can rotate with respect to each other, and a locked position in which the structure is rigid.
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