Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Peter Nicholas Hettwer0
Date of Patent
July 22, 2008
0Patent Application Number
116772840
Date Filed
February 21, 2007
0Patent Primary Examiner
Patent abstract
A cargo power drive unit includes a motor and at least one drive roller element coupled to the motor. The power drive unit further includes a light transmitter for emitting light and a light receiver for measuring light. The power drive unit measures an amount of ambient light and then measures an amount of total light after the light transmitter emits light. The power drive unit then determines whether a cargo container is present based on a calculation of reflected light and the measurement of ambient light.
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