Boring tool for radial enlargement of a cylindrical foundation bore
Patent
·
OSTI ID:6195509
A boring tool for radial widening or enlargement of a cylindrical bottom, foundation, or anchor bore is claimed. The boring tool comprises a tubular tool body having a tool shank provided for clamping in a driving machine or prime mover, and an enlarging spindle guided in the tool body and adapted to be supported on the bottom of the bore. When entering into the tool body, the enlarging spindle radially adjusts the cutting parts or elements provided for carrying out the enlargement. The tool body is formed of radially resilient segments which extend in the axial direction and delimit longitudinal slots which are open toward the front end of the tool. Cutting parts or elements are arranged on the free ends of the segments, with each part having an axial working which extends in the circumferential direction of the tool body, with those working surfaces which are adjacent one another in the circumferential direction forming the front end face of the tool body. In the starting state of the tool body, the cutting parts form a substantially complete circular ring.
- Assignee:
- Hawera Probst GmbH and Co. (Germany, Federal Republic of)
- Patent Number(s):
- US 4446934
- OSTI ID:
- 6195509
- Country of Publication:
- United States
- Language:
- English
Similar Records
Drilling tool
Downhole surge valve for earth boring apparatus
Well bore enlarger
Patent
·
Tue Oct 18 00:00:00 EDT 1983
·
OSTI ID:5506156
Downhole surge valve for earth boring apparatus
Patent
·
Tue May 29 00:00:00 EDT 1990
·
OSTI ID:6728267
Well bore enlarger
Patent
·
Tue May 20 00:00:00 EDT 1986
·
OSTI ID:5671088