3417921

Information

• Patent Grant
• 3417921

• References
• Source

• Patent Number

  3,417,921

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1968
  56 years ago

• CPC

  • E01B3/38 - Longitudinal sleepers Longitudinal sleepers integral or combined with tie-rods Combined longitudinal and transverse sleepers Layers of concrete supporting both rails
  • E01B3/40 - Slabs Blocks Pot sleepers Fastening tie-rods to them
  • E01B9/20 - by keys
  • E01B9/303 - the clip being a shaped bar
  • E01B9/60 - Rail fastenings making use of clamps or braces supporting the side of the rail
  • E01B9/62 - Rail fastenings incorporating resilient supports
  • E01B11/62 - Bridge chairs

• US Classifications

  • 238 - Railways: surface track