Patent ID: 6049923
Filing Date: 2000-04-18
Classification: A61G,B66D

Abstract:
A lift for lifting and lowering an object, the lift comprising:a first rotating portion including a first winding reel, a first friction reel, and a first sliding reel, the first winding, friction, and sliding reels being unified;a second rotating portion including a second winding reel, a second friction reel, and a second sliding reel, the second winding, friction, and sliding reels being unified;a common rotating shaft penetrating the center of the first and second rotating portions for supporting the first and second rotating portions;a rotating device for rotating the first and second rotating portions;a first string having a first end fixed on a circumference of the first winding reel and wound plural times thereon, then reaching and rounding a first assist reel, then reaching and rounding the first friction reel, and then reaching and rounding a second assist reel, the second end of the first string being looped on the first sliding reel;a second string having a first end fixed on a circumference of the second winding reel and wound plural times thereon, then reaching and rounding a third assist reel, then reaching and rounding the second friction reel, and then reaching and rounding a fourth assist reel, the second end of the second string being looped on the second sliding reel; anda common center shaft penetrating the center axes of the first, second, third, and fourth assist reels, wherein the common center shaft is parallel to the common rotating shaft of the first and second rotating portions.