2137900

Information

• Patent Grant
• 2137900

• References
• Source

• Patent Number

  2,137,900

• Date Filed

  Not available

• Date Issued

  Tuesday, November 22, 1938
  86 years ago

• CPC

  • E21B44/08 - in response to the amplitude of the movement of the percussion tool
  • Y10T74/15 - Intermittent grip type mechanical movement

• US Classifications

  • 074 - Machine element or mechanism
  • 173 - Tool driving or impacting