3220686

Information

• Patent Grant
• 3220686

• References
• Source

• Patent Number

  3,220,686

• Date Filed

  Not available

• Date Issued

  Tuesday, November 30, 1965
  58 years ago

• CPC

  • E21D15/306 - by means of a liquid
  • E21D15/30 - by means expanded or contracted by pressure applied through the medium of a fluid or quasi- fluid
  • E21D15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
  • E21D15/55 - of prop heads or feet

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force