Motorized window treatment

US8950461B2 · kind B2 · utility

Assignee

• Lutron Electronics Co., Inc. · US

Inventors

• Jason O. Adams · Emmaus, 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
• Edward J. Blair · Telford, US
• Andrew Karl Cooney · Quakertown, US
• Soumya Jain · Allentown, US
• David A. Kirby · Old Zionsville, US
• Stephen Lundy · Coopersburg, US

Key dates

• Filing date: Mar 8, 2012
• Grant date: Feb 10, 2015
• Expiry date: Mar 8, 2032

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 controls daylight entering a space through a window and includes a covering material, a drive shaft, lift cords received around the drive shaft and connected to the covering material, and a motor coupled to the drive shaft. It also includes a spring assist unit for the motor providing a torque that equals the torque provided by the weight on the lift cords at a position midway between fully-open and fully-closed positions, minimizing motor usage and conserving battery life. A photosensor for measuring the daylight outside the window and temperature sensors for measuring the temperatures inside and outside of the window may be provided. The position of the covering material is automatically controlled to save energy, or may also be controlled in response to an infrared or radio-frequency remote control.