Garage door operator

US5588257A · kind A · utility

Assignee

• THE STANLEY WORKS LTD · US

Inventors

• Dean C. Duhame · Roseville, US
• Richard P. Spens · Howell, US
• Dana J. Lowell · Holland, US
• Chin-Feng Chan · Luodong, TW
• Ming-Hwa Shou · Baoshan, TW

Key dates

• Filing date: Aug 24, 1994
• Grant date: Dec 31, 1996
• Expiry date: Aug 24, 2014

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05Y2900/106
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A door operator for garage doors is provided which includes a motor, a multiple segmented drive screw and a traveler coupled to and reciprocating along the multiple segmented drive screw. The drive screw segments have non-circular ends which are slidably coupled to each other through a complementary sleeve. Springs are used to bias the screw segments toward one another. The traveler includes a lubricating pad for lubricating the drive screw as it passes along.