I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806
Up for sale we have a Trane 3-Blade Aluminum Fan Blade # FAN01252 1/2" Bore 20" Diameter Pitch: 26 Degrees ~ Counter Clockwise It is new but I got it out of the box. There are some surface scratches on it but it still looks to be in good condition. ************************************************************
Makita 2-1/4" Counter Bore 714114-A We try to describe our items to best of our knowledge but aren’t experts on every item we sell. Please ask questions before bidding or purchasing. ONLY what is shown in the pictures is included.
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