2816728

Information

• Patent Grant
• 2816728

• References
• Source

• Patent Number

  2,816,728

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1957
  66 years ago

• CPC

  • E21D15/58 - Devices for setting props or chocks
  • E21D15/002 - Auxiliary devices in which the prop type is not essential
  • E21D15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
  • E21D15/517 - Extension elements
  • E21D15/585 - by means of hydraulically operated devices for mechanical props, or hydraulic props in which the hydraulic part is not important
  • E21D15/586 - the props being pre-loaded
  • E21D15/60 - Devices for withdrawing props or chocks
  • Y10T137/87965 - Valve- or closure-operated by coupling motion

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 137 - Fluid handling