Window covering with lifting mechanism
AssigneeSprings Window Fashions LP
InventorToralf H. Strand
Life of this patent
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Abstract
A window covering, a lifting mechanism for a window covering and a locking device for a lifting mechanism are disclosed. The lifting mechanism includes main body, a pair of cord spools rotatably mounted to the main body, and a pair of coil springs that rotate a member separate from the cord spools, and the member rotates the spools to wind the cord onto the spools. The locking device includes a main body, a cord slot associated with the main body and a locking arm having a cord channel in sliding engagement with the main body and having a channel, and a biasing mechanism to move the cord channel out of alignment with the slot and releasably lock the cord in position
Claims39
A window covering assembly comprising:
- a head rail;
- a bottom rail;
- a window covering between the head rail and the bottom rail;
- a pair of cords connecting the head rail, the bottom rail, and the window covering;
- a lifting mechanism associated with the bottom rail comprising:
- a main body;
- a pair of cord spools rotatably mounted on the main body, each of the cord spools connected to one of the pair of cords;
- a drum rotatably mounted on a central portion of the main body, the drum in rotatable engagement with the pair of cord spools;
- and a pair of coil springs connected to the drum, the coil springs each being biased to rotate the drum which rotates the cord spools to wind the each of cords onto one of the spools;
- and
- a locking mechanism to releasably secure the cords in position.
A cord take-up device for a window covering comprising:
- a main body;
- a pair of cord spools rotatably mounted on the main body, each of the cord spools connected to one of a pair of cords associated with the window covering;
- a pair of coil springs positioned within said main body and biased to rotate a drum separate from the cord spools and the drum rotates the cord spools such that the cord spools wind the cords onto the spools;
- and
- a locking mechanism to prevent the cords from winding onto the spools.
A cord take-up device for a window covering comprising:
- a main body;
- a pair of cord spools rotatably mounted on the main body, each of the cord spools connected to one of the pair of cords;
- means within said main body for rotating a drum separated from the cords spools that in turn rotates the cord spools such that the cord spools wind the cords onto the spools;
- and
- releasable locking means to prevent the cords from winding onto the spools.
A spring motor driven window covering comprising:
- at least one cord;
- and
- a cord release device including:
- a main body having a first cord slot for guiding the cord onto a take-up spool;
- a first locking arm in sliding engagement with a portion of the main body and having a channel therethrough ;
- and
- a biasing mechanism to move the first locking arm channel out of alignment with the first cord slot to releasably lock the cord in position.
A method of raising a window covering including either a cellular shade or a venetian blind comprising:
- providing a window covering including a head rail, a bottom rail, a window covering between the head rail and the bottom rail, a pair of cords connecting the head rail, the bottom rail, and the window covering, and a lifting mechanism associated with the bottom rail the lifting mechanism comprising a main body and a pair of cord spools rotatably mounted on the main body, each of the cord spools connected to one of the pair of cords;
- and
- lifting the bottom rail such that the cord spools are driven by a drum separate from the cord spools in contact with biasing means such that the cord spools take up cord as the bottom rail is being raised.
A take up mechanism for a window covering comprising:
- a main body;
- a pair of cord spools rotatably mounted on the main body, each of the cord spools connected to one of a pair of cords associated with the window covering;
- a pair of coil springs positioned within said main body and biased to rotate a drum which rotates the cord spools such that the cord spools wind the cords onto the spools;
- a removable gear mounted on the drum in contact with a portion of each cord spool.
Dependencies are inferred from the claim text.