2973178

Information

• Patent Grant
• 2973178

• References
• Source

• Patent Number

  2,973,178

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1961
  63 years ago

• CPC

  • E21D15/325 - by a clamping ring
  • E21D15/586 - the props being pre-loaded

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force