Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 19, 2017
Patent Application Number
15309444
Date Filed
May 11, 2015
Patent Citations Received
Patent Primary Examiner
Patent abstract
Disclosed is a device for turning rotatable rods for folding or unfolding wheels of a carrier, the device comprising: a pair of rotatable rods, each of which comprises one or more helical lines; a cross bar comprising helical line coupling portions coupled to one or more helical lines, and one or more elastic members, which provide restoring forces to the cross bar.
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