Roller assembly for a window blind

Details Roller assembly for a window blind Roller assembly for a window blind

1991-06-27

1991-12-10

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Hanging or drape type

With fabric operating means

160171, A47H 500

Patent

active

050709275

ABSTRACT:
A roller assembly includes an elongated casing with a shaft longitudinally provided within it. A U-shaped bracket with two opposed sides and a bottom connecting the two sides is fixed in the elongated casing. A threaded rod is sleeved on the shaft in such a way that it can rotate along with the shaft. A guiding block having a first face, a second face and an internally threaded through-hole is sleeved on the threaded rod. Each of the face have a guiding wheel. The block is sized and designed so as to sit flush on the U-shaped bracket and prevent the bracket from rotating with the threaded rod, but allowing instead the block to move axially along on the threaded rod. One end of a first string connects to one end of the threaded rod and winds on the same to a position adjacent to the first face whereat the first string is held straight between the guiding wheel on the first face and the threaded rod. A second string is also held straight between the guiding wheel on the second face of the block and the threaded rod in the same manner.

REFERENCES:
patent: 3352349 (1967-11-01), Hennequin

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