3214156

Information

• Patent Grant
• 3214156

• References
• Source

• Patent Number

  3,214,156

• Date Filed

  Not available

• Date Issued

  Tuesday, October 26, 1965
  59 years ago

• CPC

  • A62B13/00 - Special devices for ventilating gasproof shelters
  • E04H9/12 - entirely underneath the level of the ground
  • F16K17/006 - specially adapted for shelters
  • F41H5/223 - Manhole covers specially adapted for armoured or fighting vehicles
  • Y10S60/903 - Closures operators
  • Y10T74/20408 - Constant tension sustaining

• US Classifications

  • 049 - Movable or removable closures
  • 052 - Static structures
  • 060 - Power plants
  • 074 - Machine element or mechanism
  • 109 - Safes, bank protection, or a related device
  • 188 - Brakes
  • 454 - Ventilation