1919156

Information

• Patent Grant
• 1919156

• References
• Source

• Patent Number

  1,919,156

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1933
  91 years ago

• CPC

  • B66F7/18 - by a single central jack
  • E21D15/15 - Means counteracting entry of dirt Built-in cleaning devices
  • E21D15/515 - Particular fluids not covered by any chemical subdivision

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 092 - Expansible chamber devices