Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
March 8, 2011
Patent Application Number
11599121
Date Filed
November 14, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
A revolving security door includes a drum defining a secure zone between door openings controlled by a revolving door disposed within the drum and wherein light curtain sensors and active infrared sensors may detect an intruder moving from a non-secure side of the doorway to the secure side and detect objects left behind in a secure zone. Methods of operation prevent persons or objects from passing from the non-secure side to the secure side of the doorway.
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