Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Lu Hao Leng0
Date of Patent
November 28, 2006
0Patent Application Number
109858180
Date Filed
November 10, 2004
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A lockable hinge includes a first and second hinge member, a lock, and an actuator. The lockable hinge is coupled to a pair of ladder-leg sections and is arranged to allow the ladder-leg sections to move among closed-ladder, trestle-ladder, and straight-ladder positions. The lock is used to lock the hinge members to cause the ladder-leg sections to lock in the closed-ladder, trestle-ladder and straight-ladder positions.
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