Hammer drill

专利名称：Hammer drill

发明人：Dieter Grozinger,Heribert Schramm,Steffen

Wunsch,Erich Vogel

申请号：US05/462187申请日：19740418公开号：US03955628A公开日：19760511

摘要：A driven output shaft is mounted in a housing and has freedom of limited axialdisplacement between a first and a second position. A biasing spring permanently biasesthe output shaft to the first position. An impact member surrounds the output shaft andhas a plurality of angularly spaced first axial projections which interdigitate with angularlyspaced second axial projections provided on a disk member axially fixed on and turnablysurrounding the output shaft. A retaining arrangement is provided in the housing and isengageable with the disk member to prevent rotation of the same when an axial force isexerted upon the output shaft counter to the action of the biasing spring, causing axialdisplacement of the output shaft to the second position thereof, and engagement of thedisk member with the retaining arrangement.

申请人：ROBERT BOSCH G.M.B.H.

代理人：Michael J. Striker

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