With Work-contacting Carriage Or Mount, And Relatively Adjustable Nozzle Patents (Class 15/354)
With agitator adjustable relative to nozzle (Class 15/355)
Suction responsive (Class 15/357)
With work surface contact or penetration sensing (Class 15/358)
Biased or floating nozzle (Class 15/359)
Handle operated or handle associated control (Class 15/361)
  • Vehicle for cleaning pavements
    Patent number: 3939528
    Abstract: A vehicle for cleaning pavements or narrow places comprising a motorcycle, tri-cycle or four-wheel narrow vehicle having at least on one side at the front or rear thereof an elongated funnel through which dirt is drawn by means of a vacuum pump into a container on the vehicle. The funnel is retractable when the vehicle encounters an obstruction.
    Type: Grant
    Filed: May 13, 1974
    Date of Patent: February 24, 1976
    Inventor: Igal Mossinsohn
  • Vacuum cleaner suction tool
    Patent number: 3936905
    Abstract: A suction tool for use in a vacuum cleaner including a nozzle defining a suction inlet including a mid-portion and an edge portion and structure for selective blocking of air flow through the mid-portion to provide selectively high suction force at the edge portion.
    Type: Grant
    Filed: June 3, 1974
    Date of Patent: February 10, 1976
    Assignee: Whirlpool Corporation
    Inventors: Bruce E. Stewart, Keith E. Carr