3228300

Information

• Patent Grant
• 3228300

• References
• Source

• Patent Number

  3,228,300

• Date Filed

  Not available

• Date Issued

  Tuesday, January 11, 1966
  59 years ago

• CPC

  • E21D23/0073 - with advancing shifting devices connected therewith
  • E21D23/006 - provided with essential hydraulic devices
  • E21D23/14 - Effecting automatic sequential movement of supports
  • Y10T137/8326 - Fluid pressure responsive indicator, recorder or alarm

• US Classifications

  • 091 - Motors: expansible chamber type
  • 137 - Fluid handling
  • 200 - Electricity: circuit makers and breakers
  • 235 - Registers
  • 340 - Communications: electrical