Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
February 12, 2019
Patent Application Number
15077959
Date Filed
March 23, 2016
Patent Citations Received
Patent Primary Examiner
Patent abstract
A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.
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