2752757

Information

• Patent Grant
• 2752757

• References
• Source

• Patent Number

  2,752,757

• Date Filed

  Not available

• Date Issued

  Tuesday, July 3, 1956
  68 years ago

• CPC

  • E21D23/088 - by means of wheels, rollers, caterpillars, belts or worm screws

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 091 - Motors: expansible chamber type
  • 248 - Supports
  • 254 - Implements or apparatus for applying pushing or pulling force
  • 299 - Mining or in situ disintegration of hard material