×

Roll-blind

  • US 4,476,910 A
  • Filed: 02/03/1982
  • Issued: 10/16/1984
  • Est. Priority Date: 02/10/1981
  • Status: Expired due to Term
First Claim
Patent Images

1. A roll-blind comprising a blind cloth, a winding roll for winding up said blind cloth thereon, a coil spring for constantly rotating said winding roll in its cloth winding-up direction, a stopper for stopping the rotation of said winding roll against the action of said coil spring at any desired position where said blind cloth is lowered, and a speed reducing device for reducing the speed of rotation of said winding roll due to the action of said coil spring while said winding roll is being continuously rotated in the cloth winding-up direction under the action of said coil spring so that the winding-up operation continues in a smooth and reliable manner.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×