1440891

Information

• Patent Grant
• 1440891

• References
• Source

• Patent Number

  1,440,891

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1923
  102 years ago

• CPC

  • F04C18/39 - with vanes hinged to the inner as well as to the outer member

• US Classifications

  • 417 - Pumps
  • 418 - Rotary expansible chamber devices