Window Shade Having a Resistance Balancing Mechanism

Number of patents in Portfolio can not be more than 2000

United States of America Patent

APP PUB NO 20130032300A1
SERIAL NO

13402454

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A window shade comprises first and second rails, and a shading structure and a suspension cord connected between the first and second rails. The second rail includes a resistance balancing unit and a cord winding unit to which the suspension cord respectively connects. The resistance balancing unit comprises a housing having an abuttal surface, a pulley pivotally connected with the housing, and a torsion spring. The pulley has a winding portion around which the suspension cord is wrapped, and a shaft portion extending coaxial to the winding portion from a side thereof. The torsion spring is tightly mounted around the shaft portion and has at least one end. The pulley when rotating in one direction drives the end of the torsion spring to push against the abuttal surface of the housing, whereby the torsion spring loosens to allow rotation of the pulley relative to the torsion spring.

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Patent Owner(s)

Patent OwnerAddress
TEH YOR CO LTD129 2ND FLOOR CHUNG SHAN N ROAD SEC 1 TAIPEI 10418

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
HUANG, Chin-Tien New Taipei City, TW 76 1682
YU, Fu-Lai New Taipei City, TW 61 1716

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