3854775

Information

• Patent Grant
• 3854775

• References
• Source

• Patent Number

  3,854,775

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1974
  50 years ago

• CPC

  • E21C27/02 - solely by slitting
  • E21C35/06 - Equipment for positioning the whole machine in relation to its substructure
  • E21C35/24 - Remote control specially adapted for machines for slitting or completely freeing the mineral
  • Y10T137/0947 - With servo connection to valve

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 091 - Motors: expansible chamber type
  • 137 - Fluid handling