Motorized window treatment

US9605478B2 · kind B2 · utility

Assignee

• Lutron Electronics Co., Inc. · US

Inventors

• Jason O. Adams · Emmaus, US
• Edward J. Blair · Telford, US
• Andrew Karl Cooney · Quakertown, US
• Soumya Jain · Allentown, US
• David A. Kirby · Old Zionsville, US
• Stephen Lundy · Coopersburg, US
• Justin J. Mierta · Allentown, US
• Daniel W. Mistarz · Allentown, US
• Robert C. Newman, Jr. · Emmaus, US
• Peter W. Ogden, Jr. · Weilersville, US
• Jonathan L. Roe · Coopersburg, US
• Chen Ming Wu · Emmaus, US
• Justin M. Zernhelt · New York, US

Key dates

• Filing date: Dec 22, 2014
• Grant date: Mar 28, 2017
• Expiry date: Dec 22, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02D30/70
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A motorized window treatment provides a low-cost solution for controlling the amount of daylight entering a space through a window. The window treatment includes a covering material, a drive shaft, at least one lift cord rotatably received around the drive shaft and connected to the covering material, and a motor coupled to the drive shaft for raising and lowering the covering material. The window treatment also includes a spring assist unit for assisting the motor by providing a torque that equals the torque provided by the weight on the cords that lift the covering material at a position midway between fully-open and fully-closed positions, which helps to minimize motor usage and conserve battery life if a battery is used to power the motorized window treatment. The window treatment may comprise a photosensor for measuring the amount of daylight outside the window and temperature sensors for measuring the temperatures inside and outside of the window. The position of the covering material may be automatically controlled in response to the photosensor and the temperature sensors to save energy, or may also be controlled in response to an infrared or radio-frequency remote control.