Tool for processing drilled holes

US5297905A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hermann Schmidt · Linz, DE
• Dieter Aulich · Gomaringen, DE
• Peter Essig · Karlsruhe, DE

Key dates

• Filing date: Jun 29, 1992
• Grant date: Mar 29, 1994
• Expiry date: Jun 29, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T408/89
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A tool for processing holes has a shaft which can be clamped in a drive element for executing a forward stroke into a working position within a hole, a return stroke, and an at least rotating working motion of the tool, two support elements arranged on the shaft, wires clamped at one end of the shaft between the support elements and being sprung bowing away from the shaft in an arc shape, the wires being coated with a cutting medium. One of the support elements is axially adjustable relative to the shaft. The shaft has axially positioned slots distributed on a circumference in two regions axially offset from one another. The shaft also has an axial hole leading out from both ends of the shaft and extending into the regions. The support elements are formed as limit stops inserted in the axial hole and each end just short of an entry of the hole into an area of the slots. The wires have ends extending through the slots and coming to rest on the limit stops.