Patents by Inventor Harold W. Schaefer

Harold W. Schaefer 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: 4312542
    Abstract: A brush-beater assembly for a vacuum cleaner comprises a hollow cylinder having outwardly extending projections formed in the material thereof, and slots diametrically opposed to the projections for receiving brush assemblies. The projections may be formed pneumatically or hydraulically in the cylinder, during the production thereof. An additional projection is provided in front of the brush assemblies.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: January 26, 1982
    Assignee: National Union Electric Corporation
    Inventor: Harold W. Schaefer
  • Patent number: 4311493
    Abstract: A vacuum cleaner has an elongated porous outer bag for holding a filter bag over an air outlet. A hanger within the outer bag is positioned to suspend the outer bag from the vacuum cleaner, as well as to hold a pocket within the outer bag, so that spare filter bags may be held within the porous outer bag.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: January 19, 1982
    Assignee: National Union Electric Corporation
    Inventors: Harold W. Schaefer, Joyce K. Thomas, Samuel E. Hohulin
  • Patent number: 4249281
    Abstract: An upright vacuum cleaner has a single motor on the body thereof, for rotating the vacuum producing fan blade, for rotating the rotary brush, as well as for driving the wheels by way of a clutch. The clutch is driven from the motor shaft by way of Evoloid gearing and a continuously driven bevel pinion, to drive oppositely rotating bevel gears. The handle grip of the cleaner is slidable along the end of the shaft or rod between the handle and the body, and controls a Bowden cable to effect the movement of a pair of clutch plates with respect to corresponding bevel gears, thereby to drive wheels on the body in a reversible manner.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: February 10, 1981
    Assignee: National Union Electric Corporation
    Inventors: Robert B. Meyer, Harold W. Schaefer, Richard E. Kronmiller
  • Patent number: 4240812
    Abstract: A vacuum cleaner has an elongated porous outer bag for holding a filter bag over an air outlet. A hanger within the outer bag is positioned to suspend the outer bag from the vacuum cleaner, as well as to hold a pocket within the outer bag, so that spare filter bags may be held within the porous outer bag and an end flap extending into the outer bag.
    Type: Grant
    Filed: July 9, 1979
    Date of Patent: December 23, 1980
    Assignee: National Union Electric Corporation
    Inventors: Harold W. Schaefer, Joyce K. Thomas, Samuel E. Hohulin
  • Patent number: 4209873
    Abstract: A brush-beater assembly for a vacuum cleaner comprises a hollow cylinder having outwardly extending projections formed in the material thereof, and slots diametrically opposed to the projections for receiving brush assemblies. The projections may be formed pneumatically or hydraulically in the cylinder, during the production thereof. An additional projection is provided in front of the brush assemblies.
    Type: Grant
    Filed: June 2, 1978
    Date of Patent: July 1, 1980
    Assignee: National Union Electric Corporation
    Inventor: Harold W. Schaefer
  • Patent number: D252332
    Type: Grant
    Filed: April 6, 1977
    Date of Patent: July 10, 1979
    Assignee: National Union Electric Corporation
    Inventor: Harold W. Schaefer
  • Patent number: D253891
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: January 8, 1980
    Assignee: National Union Electric Corporation
    Inventors: Harold W. Schaefer, Martin E. Wiese
  • Patent number: D261515
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: October 27, 1981
    Assignee: National Union Electric Corporation
    Inventors: Harold W. Schaefer, Martin E. Wiese