1889822

Information

• Patent Grant
• 1889822

• References
• Source

• Patent Number

  1,889,822

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1932
  92 years ago

• CPC

  • F04C2/3564 - the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
  • F04B23/12 - at least one pump being of the rotary-piston positive-displacement type
  • F04C13/002 - for homogeneous viscous liquids

• US Classifications

  • 417 - Pumps
  • 092 - Expansible chamber devices