3399699

Information

• Patent Grant
• 3399699

• References
• Source

• Patent Number

  3,399,699

• Date Filed

  Not available

• Date Issued

  Tuesday, September 3, 1968
  56 years ago

• CPC

  • B41J5/08 - Character or syllable selected by means of keys or keyboards of the typewriter type
  • B41J23/22 - for key or like type selection
  • F15C1/001 - for punched-card machines ; for typewriters ; for keyboards; for conveying cards or tape; for conveying through tubes ; for computers ; for dc-ac transducers for information processing ; for signal transmission
  • F15C3/007 - using a spiral spring which allows fluid bass upon deformation
  • F16K1/40 - of helical shape
  • G06K7/02 - by pneumatic or hydraulic means
  • Y10T137/87096 - Valves with separate, correlated, actuators

• US Classifications

  • 137 - Fluid handling
  • 267 - Spring devices