The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
May. 11, 1976

Filed:

Apr. 18, 1974
Applicant:
Inventors:

Dieter Grozinger, Echterdingen, DT;

Heribert Schramm, Stuttgart, DT;

Steffen Wunsch, Dettenhausen, DT;

Erich Vogel, Bernhausen, DT;

Assignee:

Robert Bosch G.m.b.H., Stuttgart, DT;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25D / ; E21C / ;
U.S. Cl.
CPC ...
173 13 ; 173 48 ; 173 97 ;
Abstract

A driven output shaft is mounted in a housing and has freedom of limited axial displacement between a first and a second position. A biasing spring permanently biases the output shaft to the first position. An impact member surrounds the output shaft and has a plurality of angularly spaced first axial projections which interdigitate with angularly spaced second axial projections provided on a disk member axially fixed on and turnably surrounding the output shaft. A retaining arrangement is provided in the housing and is engageable with the disk member to prevent rotation of the same when an axial force is exerted upon the output shaft counter to the action of the biasing spring, causing axial displacement of the output shaft to the second position thereof, and engagement of the disk member with the retaining arrangement.


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