US 12,297,839 B2
Ceiling fan with concentric stationary tube and power-down features
Richard M. Aynsley, Doonan (AU); Richard W. Fizer, Lexington, KY (US); Richard A. Oleson, Lexington, KY (US); and J. Carey Smith, Lexington, KY (US)
Assigned to DELTA T, LLC, Lexington, KY (US)
Filed by DELTA T, LLC, Lexington, KY (US)
Filed on Feb. 26, 2021, as Appl. No. 17/187,032.
Application 15/284,127 is a division of application No. 13/942,164, filed on Jul. 15, 2013, granted, now 9,458,859.
Application 15/284,127 is a division of application No. 12/399,428, filed on Mar. 6, 2009, granted, now 8,672,649.
Application 17/187,032 is a continuation of application No. 15/284,127, filed on Oct. 3, 2016.
Application 13/942,164 is a continuation in part of application No. 12/249,086, filed on Oct. 10, 2008, granted, now 8,147,182.
Claims priority of provisional application 61/034,254, filed on Mar. 6, 2008.
Claims priority of provisional application 60/978,860, filed on Oct. 10, 2007.
Prior Publication US 2021/0180602 A1, Jun. 17, 2021
Int. Cl. F04D 25/08 (2006.01); F04D 25/06 (2006.01); F04D 27/00 (2006.01); F04D 29/32 (2006.01); F04D 29/34 (2006.01); F04D 29/38 (2006.01); F04D 29/58 (2006.01); F04D 29/60 (2006.01); F04D 29/64 (2006.01); F24F 11/77 (2018.01); F24F 11/52 (2018.01)
CPC F04D 25/088 (2013.01) [F04D 25/068 (2013.01); F04D 27/004 (2013.01); F04D 27/008 (2013.01); F04D 29/329 (2013.01); F04D 29/34 (2013.01); F04D 29/384 (2013.01); F04D 29/5806 (2013.01); F04D 29/601 (2013.01); F04D 29/646 (2013.01); F24F 11/77 (2018.01); F24F 11/52 (2018.01)] 13 Claims
OG exemplary drawing
 
1. A fan system, the fan system comprising:
(a) a hub, wherein the hub is configured to rotate;
(b) a plurality of fan blades mounted to the hub;
(c) a drive system comprising:
i. a rotatable hollow output shaft extending through a housing, wherein the rotatable hollow output shaft is in communication with the hub,
ii. a motor, wherein the motor is operable to rotate the hub via the rotatable hollow output shaft, and
(d) a stationary tube inserted through the rotatable hollow output shaft, wherein the stationary tube is configured to remain stationary as the rotatable hollow output shaft rotates;
(e) at least one mount for mounting to an upper portion of the stationary tube;
(f) a hub mounting flange secured to the rotatable hollow output shaft by a plurality of fasteners.