3639972

Information

• Patent Grant
• 3639972

• References
• Source

• Patent Number

  3,639,972

• Date Filed

  Not available

• Date Issued

  Tuesday, February 8, 1972
  53 years ago

• CPC

  • F15B13/04 - for use with a single servomotor
  • F16K11/0712 - comprising particular spool-valve sealing means
  • Y10T29/49872 - Confining elastic part in socket
  • Y10T29/536 - Piston ring inserter or remover
  • Y10T29/53657 - to apply or remove a resilient article [e.g., tube, sleeve, etc.]
  • Y10T29/53904 - Means comprising piston ring group contractor or holder

• US Classifications

  • 029 - Metal working