Automatic movement ascent device gear of roll screen

Details Automatic movement ascent device gear of roll screen Automatic movement ascent device gear of roll screen

2006-06-02

2009-06-23

Mitchell, Katherine W (Department: 3634)

Flexible or portable closure, partition, or panel

Roll type

With rotating means

C160S321000, C160S323100, C188S265000

Reexamination Certificate

active

07549458

ABSTRACT:
An automatic winding device of a roll screen is disclosed. A screen is automatically rolled up when a user pulls a ball chain down and the screen is automatically stopped when the user just releases the ball chain, to thereby adjust a height of the screen simply and easily. A lower end of the screen is prevented from colliding with the winding device when the screen is rolled up, to thereby create a silent and comfortable indoor environment.

REFERENCES:
patent: 4662423 (1987-05-01), Ishii
patent: 5029629 (1991-07-01), Cheng-Pei
patent: 5167269 (1992-12-01), Abo
patent: 5542464 (1996-08-01), Shiina
patent: 5566741 (1996-10-01), Ogawara et al.
patent: 7234503 (2007-06-01), Kwak
patent: 0628697 (1994-12-01), None
patent: 7-233684 (1995-09-01), None
patent: 20-1998-063301 (1998-11-01), None
English language Abstract of JP 7-233684.

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