Spiral balance device

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10385599
APP PUB NO 20190032385A1
SERIAL NO

16025714

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A spiral balance device for sash windows has a pipe inside of which extends a spiral rod having a screw section. A lower end of the spiral rod extends through a slot in a coupling rotatably disposed inside the lower end of the pipe and projects from the lower end of the pipe. A torsion spring has an upper end fixed near the upper end of the pipe and a lower end fixed to the coupling. A fixing member is fixed within the upper end of the pipe, and an adjustment member rotatably disposed below the fixing member engages with the upper end of the spiral rod. A ratchet mechanism disposed between the fixing member and adjustment member allows rotation of the adjustment member in a direction of winding the torsion spring and prevents rotation of the adjustment member in a direction of unwinding the torsion spring.

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Patent Owner(s)

  • NAKANISHI INDUSTRIAL CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakanishi, Yoshikazu Tokyo, JP 25 349

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