3302529

Information

• Patent Grant
• 3302529

• References
• Source

• Patent Number

  3,302,529

• Date Filed

  Not available

• Date Issued

  Tuesday, February 7, 1967
  57 years ago

• CPC

  • E21D23/0073 - with advancing shifting devices connected therewith
  • E21D15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
  • E21D23/0069 - without essential advancing shifting devices

• US Classifications

  • 091 - Motors: expansible chamber type
  • 251 - Valves and valve actuation