Patent ID: 11920407
Assignee: HUNTER DOUGLAS INC.
Field: Civil engineering (Other fields)
Classification: CPC E  Y | IPC E

Claim 11:
12. A covering for an architectural opening, said covering comprising:
a rotator tube;
a shade material coupled to said rotator tube, said shade material configured to be wound around and unwound from said rotator tube with rotation of said rotator tube;
a power assist module configured to be installed within said rotator tube, said power assist module comprising:
a shaft;
a spring having a first end and a second end, said spring at least partially surrounding said shaft between said first and second ends thereof, said second end of said spring being coupled to said shaft;
a tube adapter member positioned adjacent to said first end of said spring, said tube adapter member coupling said first end of said spring to said rotator tube such that said tube adapter member, said rotator tube, and said first end of said spring rotate together relative to both said shaft and said second end of said spring when said power assist module is rotationally driving said rotator tube; and
a rotatable component positioned adjacent to said tube adapter member, said rotatable component configured to be axially decoupled from said tube adapter member to allow said rotatable component to be rotated relative to said tube adapter member;

wherein rotation of said rotatable component relative to said tube adapter results in said spring being wound to adjust a spring force of said spring.