Chamberlains Power Drive® and Whisper Drive® belong to the residential garage door opener category in the do-it-yourself range. The Elite(TM) range contains premier residential and commercial gate operators and access control systems. The Sentex® range is for secure residential and commercial garages. Sears Holdings Corporation, parent of Kmart and Sears, Roebuck and Co., is the third largest broad line retailer in the US. Sears Holdings is a leading supplier of tools, lawn and garden, home electronics, and automotive repair and maintenance. It supplies the Craftsman range of garage door openers.
Craftsman supplies power tools, storage chests and cabinets, bench power tools, mechanics tools, power tool accessories, general hand tools, compressor tools, carpentry tools and home security and garage door openers and accessories. The Craftsman range of garage door openers consist of simple ½ hp garage door opener, ¾ hp garage door opener in chain drive models. Other products include the universal remote control conversion kit with 1 remote, the 10ft chain drive extension kit, the 10ft extension kit for garage door opener, the 8ft extension kit for garage door opener, the 8ft rail extension kit, the Remote control, 3-function security, keyless entry pad, plug-in light control for garage door opener, the wireless garage door monitor and the extension kit (screw drive).
This weakening of the springs or points of attachment would often lead to an inadvertent explosive failure flinging the broken spring components across the garage, embedding the spring or steel components into the garage walls, cars or other items in the path of travel. Unfortunately, sometimes people were in the path of travel of these explosive occurrences. As these springs failed, as an attempted safeguard, some manufacturers devised a "caging" system for the springs. These cages were retrofitted onto the stretched springs in an attempt to capture the parts that would release if a failure occurred. While these caging devices were helpful, they were not completely effective. Some of these spring devices are still in use today. Whenever this condition exists or the quality of garage components are questionable, a qualified professional service technician should be consulted.
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