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公开(公告)号:US3552239A
公开(公告)日:1971-01-05
申请号:US3552239D
申请日:1968-06-12
申请人: ROY L YEAMAN , OTIS D CORBIN
发明人: YEAMAN ROY L , CORBIN OTIS D
CPC分类号: B25H1/0057 , Y10T408/563 , Y10T408/5635 , Y10T408/5638 , Y10T408/6786 , Y10T408/83 , Y10T408/8595
摘要: A DRIVE FOR SECURING A PORTABLE DRILL TO THE MATERIAL BEING WORKED UPON AND PROVIDING LEVERAGE THROUGH A FULCRUM FOR APPLYING PRESSURE TO THE DRILL. THE FULCRUM IS EXTENDABLE AND SLIDABLY AND PIVOTALLY CONNECTED TO THE STATIONARY BASE SUPPORT WHILE THE LEVER IS PIVOTALLY AND ROTATABLY CONNECTED TO THE FULCRUM. THE DRILL ATTACHMENT MEANS IS ROTATABLY AND PIVOTALLY CONNECTED TO THE LEVER OUTWARDLY OF A HANDLE MEANS THEREON OPPOSITELY DISPOSED FROM THE FULCRUM.