专利名称：Bump-feed trimmer 发明人：David Harris
娓娓是什么意思申请号：US06/338838
双十一广告语申请日：19820112
本山艺术学院
桃花依旧笑春风的上一句是什么公开号：US04419822A
公开日：
冰臼群19831213
清明别称专利内容由知识产权出版社提供
摘要：A bump-feed monofilament string trimmer has a sleeve-like escapement member (52) axially slidable on a drive member (42) and nested in a spool member (66) which holds a coil (71) of cutting filament. Axially downwardly extending fingers (84) of the escapement member (52) engage in window-like slots (92) in a downwardly extending dome-like protrusion (16) of the spool member (66) to prevent relative rotation between the two members (52,66). The fingers (84) have external screw threaded portions (86) which extend through the slots (92) and are engaged by a nut (18) which releasably cures the spool member (66) to the escapement member (52). The driving member has teeth (88) which normally drivingly engage with an upper ries of internal clutch teeth (58) of the escapement member, and temporarily engage with a lower ries of clutch teeth (102, 104) when the dome-like protrusion (16) is "bumped" on the ground, whereby discrete lengths of cutting filament are let out from the spool member (66).
申请人：BLACK & DECKER INC.绝对速度
代理人：Harold Weinstein,Edward D. Murphy,Walter Otten
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