专利名称：Spring drive system and window cover
spring framework和spring的关系
发明人：Andrew J. Toti
申请号：US09685312
申请日：20001010
公开号：US06648050B1
公开日：
20031118
专利内容由知识产权出版社提供
专利附图：
摘要：A spring drive system useful for window covers is disclosed, which comprises one or more coil spring drives or flat spring drives and the combination whose elements are selected from one or more of a group which includes (1) a band or cord transmission which provides varying ratio power transfer as the cover is opened and closed; (2) gear
means comprising various gear sets which provide frictional holding force and fixed power transfer ratios; (3) a gear transmission which provides fixed ratio power transfer as the cover is opened or closed; (4) crank mechanisms; (5) brake mechanisms; and (6) recoiler mechanisms. The combination permits the spring drive force to be tailored to the weight and/or compression characteristics of an associated window cover such as a horizontal slat or pleated or box blind as the cover is opened and closed.
申请人：TOTI ANDREW J.
代理人：Philip A. Dalton
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