2506988

Information

• Patent Grant
• 2506988

• References
• Source

• Patent Number

  2,506,988

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1950
  74 years ago

• CPC

  • E21B19/081 - Screw-and-nut feed mechanisms
  • E21B41/0021 - Safety devices
  • Y10T74/18576 - including screw and nut
  • Y10T74/19735 - Nut disengageable from screw
  • Y10T74/19809 - Independent nut segments

• US Classifications

  • 074 - Machine element or mechanism
  • 175 - Boring or penetrating the earth