Take-up roller for curtains of the roll-up type
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 7, 1992
Grant Date -
N/A
app pub date -
May 7, 1990
filing date -
May 12, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A roller on which a curtain is rolled up has its respective ends closed by a washer and by a cap having two opposed recesses one inside and the other outside the roller. A first support in the outer recess supports one end of a threaded rod passing inside the roller and inserted at its other end, in a second support fastened to the washer. The threaded rod crosses two opposed bodies one of which is fixed and the other is movable, by virtue of its coupling with the threaded rod and the rod's axial rotation. Between the two bodies, a helical spring has its ends fastened to the same bodies, so that, the rotation of the roller causes the rotation of the movable body, which twists the spring, but at the same time moves along the threaded rod, thereby changing the longitudinal space available to the spring.
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Family
International Classification(s)
Cited Art Landscape
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