Russ Huber Posted April 26, 2023 Posted April 26, 2023 (edited) Please feel free to add more. 1499093907762005999-01729277 (storage.googleapis.com) 1499066564452149018-02153576 (storage.googleapis.com) 1498389299782471706-02273756 (storage.googleapis.com) Edited April 26, 2023 by Russ Huber Quote
Bill Dunlap Posted April 26, 2023 Posted April 26, 2023 Nothing new under the sun, it seems. The third one is essentially a toroidal blade design, isn't it? In 1939. Quote
Russ Huber Posted April 26, 2023 Author Posted April 26, 2023 44 minutes ago, Bill Dunlap said: Nothing new under the sun, it seems. Yes, we see these every day. There's more. 🙂 Quote
Bill Dunlap Posted April 26, 2023 Posted April 26, 2023 (edited) I guess those MIT guys who "invented" the toroidal blades weren't so clever by half. I have a mind to send them an email with these blade designs in them and "educate" the MIT geniuses. They should have researched antique fan blade design first. Edited April 26, 2023 by Bill Dunlap Quote
Russ Huber Posted April 26, 2023 Author Posted April 26, 2023 I know I viewed a metal blade patent in the past with a toroidal type design. I remember it, unfortunately Google patents is not as user friendly as in the past. Quote
Jim Kovar Posted April 28, 2023 Posted April 28, 2023 On 4/25/2023 at 11:04 PM, Russ Huber said: 1498389299782471706-02273756 (storage.googleapis.com) Conceptually, ain't that what Ribbonaire did? 1 Quote
Russ Huber Posted April 28, 2023 Author Posted April 28, 2023 Progress Lighting P250063-152 Willacy 48" 3 Blade Smart | Build.com Quote
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