1631369

Information

• Patent Grant
• 1631369

• References
• Source

• Patent Number

  1,631,369

• Date Filed

  Not available

• Date Issued

  Tuesday, June 7, 1927
  97 years ago

• CPC

  • E21D3/00 - Raising shafts

• US Classifications

  • 091 - Motors: expansible chamber type
  • 092 - Expansible chamber devices
  • 173 - Tool driving or impacting
  • 188 - Brakes