Patents by Inventor David M. Alvarez

David M. Alvarez 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).

  • Patent number: 5613270
    Abstract: A motorless floor washing machine comprising a frame carrying a suction pump, wheels carried by the frame for moving of the machine and actuation of the pump to suck up a liquid, a handle for moving the frame and elements carried thereby, thereby to move the wheels and actuate the pump, a recovery tank fed by the pump, and a dispenser carried by the frame for discharging a cleaning liquid in front of the pump, whereby upon manual movement of the machine and discharge of a cleaning liquid carried thereby onto a floor, the cleaning liquid cleans the floor and is thereafter sucked up by the pump.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: March 25, 1997
    Assignees: David M. Alvarez, John M. Alvarez
    Inventors: John M. Alvarez, David M. Alvarez
  • Patent number: 4150456
    Abstract: A floor scrubber is provided with a propane powered internal combustion engine which is mounted on a wheeled dolly and which is attached by its rotary output shaft to a circular cage provided with a plurality of rotary brushes on the underside thereof. More specifically the output shaft from the internal combustion engine is connected through a pulley arrangement to the various rotary brushes and accordingly the cage and the brushes are driven in counter-rotation. Included in the structure of the dolly is a spring loaded, telescoping support for deploying a serrated clean-out bar which by angular alignment can be placed under the path of advance of the pads in the cage, thus providing a cleaning function therefor. The internal combustion engine, furthermore, is contained in a noise reducing housing which furthermore is provided with a fan for cooling.
    Type: Grant
    Filed: July 7, 1978
    Date of Patent: April 24, 1979
    Inventors: David M. Alvarez, John M. Alvarez