3430672

Information

• Patent Grant
• 3430672

• References
• Source

• Patent Number

  3,430,672

• Date Filed

  Not available

• Date Issued

  Tuesday, March 4, 1969
  55 years ago

• CPC

  • B21D53/20 - washers
  • F16B39/24 - by means of washers, spring washers, or resilient plates that lock against the object
  • F16B43/004 - with a radial cut in order to improve elasticity of the washer
  • Y10S411/958 - Coiled washer

• US Classifications

  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
  • 470 - Threaded, headed fastener, or washer making: process and apparatus