1450603

Information

• Patent Grant
• 1450603

• References
• Source

• Patent Number

  1,450,603

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1923
  101 years ago

• CPC

  • E21D15/486 - with essential hydraulic or pneumatic details
  • E21D15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
  • E21D15/517 - Extension elements
  • E21D15/606 - the props being moved systematically
  • E21D23/10 - with advancing devices separate from the supporting construction

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 092 - Expansible chamber devices
  • 299 - Mining or in situ disintegration of hard material