2803444

Information

• Patent Grant
• 2803444

• References
• Source

• Patent Number

  2,803,444

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1957
  67 years ago

• CPC

  • E21D23/0052 - with advancing shifting devices connected therewith
  • E21D23/085 - acting on a conveyor or a guide for the mining machine
  • E21D23/16 - Hydraulic or pneumatic features

• US Classifications

  • 299 - Mining or in situ disintegration of hard material