Patents by Inventor K. W. M. van Raaij

K. W. M. van Raaij has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Unloading system for street sweeper
    Patent number: 4601631
    Abstract: A motorized vehicular vacuum street sweeper (2) has a hopper (12) for receiving suctioned debris and includes unloading devices (36) provided by a flexible sheet-like wrapper (38) in the hopper forming a receptacle cavity (76). The wrapper is flexed by actuation devices (74) to shrink the cavity and expel debris through an exit door (40) in the hopper.
    Type: Grant
    Filed: February 10, 1984
    Date of Patent: July 22, 1986
    Inventor: K. W. M. Van Raaij
  • Street sweeper
    Patent number: D281109
    Type: Grant
    Filed: April 27, 1983
    Date of Patent: October 22, 1985
    Inventor: K. W. M. van Raaij