3708023

Information

• Patent Grant
• 3708023

• References
• Source

• Patent Number

  3,708,023

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1973
  52 years ago

• CPC

  • E21B4/145 - of the self propelled-type
  • F01B11/04 - Engines combined with reciprocatory driven devices
  • F01L21/02 - Piston or piston-rod used as valve members
  • F03C1/035 - one single-acting piston being always under the influence of the liquid under pressure

• US Classifications

  • 175 - Boring or penetrating the earth
  • 173 - Tool driving or impacting