3872894

Information

• Patent Grant
• 3872894

• References
• Source

• Patent Number

  3,872,894

• Date Filed

  Not available

• Date Issued

  Tuesday, March 25, 1975
  49 years ago

• CPC

  • H02G9/06 - in underground tubes or conduits Tubes or conduits therefor
  • F16L37/12 - using hooks, pawls or other movable or insertable locking members
  • F16L37/56 - for double-walled or multi-channel pipes or pipe assemblies
  • F16L47/065 - with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket, the sealing rings being placed previously on the male part

• US Classifications

  • 138 - Pipes and tubular conduits
  • 285 - Pipe joints or couplings