3918531

Information

• Patent Grant
• 3918531

• References
• Source

• Patent Number

  3,918,531

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1975
  49 years ago

• CPC

  • E21C3/02 - Machines in which the tool is connected to an impulse member
  • B23Q5/26 - Fluid-pressure drives
  • B28D1/14 - by boring or drilling
  • B28D1/26 - by impact tools

• US Classifications

  • 173 - Tool driving or impacting
  • 091 - Motors: expansible chamber type