IT1235921B - Hole digging machine - Google Patents
Hole digging machineInfo
- Publication number
- IT1235921B IT1235921B IT3690A IT369089A IT1235921B IT 1235921 B IT1235921 B IT 1235921B IT 3690 A IT3690 A IT 3690A IT 369089 A IT369089 A IT 369089A IT 1235921 B IT1235921 B IT 1235921B
- Authority
- IT
- Italy
- Prior art keywords
- digging machine
- hole digging
- troncoconic
- conic
- helicoidal
- Prior art date
Links
Landscapes
- Earth Drilling (AREA)
- Soil Working Implements (AREA)
Abstract
The hole digging machine according to the present invention is the type consisting of a vertical shaft (2) equipped with a lower centring point (3) and surrounded by at least one helicoidal surface (4) defining the active helix of the drill (1) itself, and is differentiated by the fact that the helicoidal surface (4) defines with its external edges (8) a conic or troncoconic surface for the realization of conic or troncoconic holes (6).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT3690A IT1235921B (en) | 1989-11-07 | 1989-11-07 | Hole digging machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT3690A IT1235921B (en) | 1989-11-07 | 1989-11-07 | Hole digging machine |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8903690A0 IT8903690A0 (en) | 1989-11-07 |
IT1235921B true IT1235921B (en) | 1992-12-02 |
Family
ID=32922954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT3690A IT1235921B (en) | 1989-11-07 | 1989-11-07 | Hole digging machine |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1235921B (en) |
-
1989
- 1989-11-07 IT IT3690A patent/IT1235921B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
IT8903690A0 (en) | 1989-11-07 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19931130 |