2784440

Information

• Patent Grant
• 2784440

• References
• Source

• Patent Number

  2,784,440

• Date Filed

  Not available

• Date Issued

  Tuesday, March 12, 1957
  68 years ago

• CPC

  • A47L11/4041 - Roll shaped surface treating tools
  • A47L11/24 - Floor-sweeping machines, motor-driven
  • A47L11/4013 - Contaminants collecting devices
  • A47L11/4025 - Means for emptying
  • A47L11/4027 - Filtering or separating contaminants or debris
  • A47L11/4033 - Means for cleaning filters
  • E01H1/0854 - Apparatus in which the mechanically dislodged dirt is partially sucked-off

• US Classifications

  • 015 - Brushing, scrubbing, and general cleaning
  • 055 - Gas separation