2340472

Information

• Patent Grant
• 2340472

• References
• Source

• Patent Number

  2,340,472

• Date Filed

  Not available

• Date Issued

  Tuesday, February 1, 1944
  81 years ago

• CPC

  • B21F3/10 - to spirals other than flat
  • B21F3/04 - externally on a mandrel or the like
  • F16B37/12 - with thread-engaging surfaces formed by inserted coil-springs, discs, or the like Independent pieces of wound wire used as nuts Threaded inserts for holes

• US Classifications

  • 072 - Metal deforming
  • 076 - Metal tools and implements, making
  • 411 - Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener