IT1235921B - Hole digging machine - Google Patents

Hole digging machine

Info

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
Application number
IT3690A
Other languages
Italian (it)
Other versions
IT8903690A0 (en
Inventor
Franco Selvatici
Original Assignee
Franco Selvatici
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Franco Selvatici filed Critical Franco Selvatici
Priority to IT3690A priority Critical patent/IT1235921B/en
Publication of IT8903690A0 publication Critical patent/IT8903690A0/en
Application granted granted Critical
Publication of IT1235921B publication Critical patent/IT1235921B/en

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).
IT3690A 1989-11-07 1989-11-07 Hole digging machine IT1235921B (en)

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)

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