2438637

Information

• Patent Grant
• 2438637

• References
• Source

• Patent Number

  2,438,637

• Date Filed

  Not available

• Date Issued

  Tuesday, March 30, 1948
  77 years ago

• CPC

  • E21B17/22 - Rods or pipes with helical structure
  • B65G33/00 - Screw or rotary spiral conveyors
  • B65G33/32 - Adaptations of bearings or couplings for supporting and connecting screws
  • E21B17/20 - Flexible or articulated drilling pipes
  • B65G2812/0561 - characterised by the shape

• US Classifications

  • 037 - Excavating
  • 175 - Boring or penetrating the earth
  • 198 - Conveyors: power-driven
  • 415 - Rotary kinetic fluid motors or pumps