US 11,988,037 B2
Window blind lifting and tilting system
Tser Wen Chou, Yorba Linda, CA (US)
Filed by Tser Wen Chou, Yorba Linda, CA (US); and Mason Chou, Irvine, CA (US)
Filed on Jun. 1, 2022, as Appl. No. 17/830,300.
Claims priority of application No. 110206689 (TW), filed on Jun. 9, 2021; and application No. 111204349 (TW), filed on Apr. 27, 2022.
Prior Publication US 2022/0396999 A1, Dec. 15, 2022
Int. Cl. E06B 9/322 (2006.01); E06B 9/326 (2006.01); E06B 9/327 (2006.01)
CPC E06B 9/322 (2013.01) [E06B 9/326 (2013.01); E06B 9/327 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a plurality of slats of a window blind;
a blind bottom that is positioned below the plurality of slats;
a tilting control shaft; a lifting control shaft;
a reeling drum sleeving the lifting control shaft, said reeling drum is slidable along the lifting control shaft during rotation of the lifting control shaft;
a ladder belt that is fastened to the tilting control shaft and interconnects the plurality of slats, wherein rotating the tilting control shaft tilts the plurality of slats; and
a pair of lifting cords comprising a front lifting cord and a rear lifting cord, each cord having a first end fastened to the reeling drum and a second end connected to the blind bottom,
wherein the front lifting cord is positioned beyond front edges of the plurality of slats and the rear lifting cord is positioned beyond rear edges of the plurality of slats,
wherein rotating the lifting control shaft drives the reeling drum to wind or unwind the front and rear lifting cords to lift or lower the blind bottom and one or more slats in the plurality of slats.