3530490

Information

• Patent Grant
• 3530490

• References
• Source

• Patent Number

  3,530,490

• Date Filed

  Not available

• Date Issued

  Tuesday, September 22, 1970
  54 years ago

• CPC

  • E21D23/26 - Hydraulic or pneumatic control
  • E21D23/0021 - comprising two walking elements
  • E21D23/12 - Control
  • E21D23/18 - of advancing mechanisms

• US Classifications

  • 091 - Motors: expansible chamber type
  • 405 - Hydraulic and earth engineering