3420320

Information

• Patent Grant
• 3420320

• References
• Source

• Patent Number

  3,420,320

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • E02D5/385 - with removal of the outer mould-pipes
  • E02D7/28 - Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
  • E21B7/006 - combined with a bucket-type container
  • E21B7/20 - Driving or forcing casings or pipes into boreholes

• US Classifications

  • 175 - Boring or penetrating the earth
  • 173 - Tool driving or impacting
  • 405 - Hydraulic and earth engineering