Hand drill, in particular hammer drill

US5470084A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wilbert Reibetanz · Leinfelden, DE
• Otto Baumann · Echterdingen, DE
• Rolf Mueller · Echterdingen, DE
• Bernd Ruckh · Waldenbuch, DE

Key dates

• Filing date: Nov 7, 1994
• Grant date: Nov 28, 1995
• Expiry date: Nov 7, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T279/29
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A hand drill, in particular a hammer drill has a combination tool holder provided with a first tool receptacle with clamping jaws displaceable relative to a base body and adjustable by a rotatable adjusting ring to different diameters of tool shafts, and a second separate tool receptacle for tools with a groove shaft and provided with means for at least one driving and locking as well as with a central receiving opening for the groove shaft tool, and an arresting device having a blocking slider which is arranged displaceably in the base body and non-rotatably connected with the base body in a circumferential direction, the blocking slider being movable between a first end position in which a radially inwardly directed end of the blocking slider engages in the central receiving opening and is provided with teeth such that when a groove shaft tool is inserted in the receiving opening the teeth in another end position of the blocking slider non-rotatably engage with counter teeth connected with the adjusting ring.