Patents by Inventor Donovan J. Allen

Donovan J. Allen 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).

  • Re-circulating vacuum apparatus for cleaning fabric and other non-tensioned surfaces
    Patent number: 7665181
    Abstract: An air re-circulating vacuum for cleaning loose fabric and other non-tensioned surfaces is disclosed. The vacuum has an air intake and an air exhaust located together inside an air space to create a turbulent flow to pull air and debris through an air flow space as the air flow space is pulled over the surface to be cleaned. The vacuum can be battery powered, or powered by plugging into a standard household current.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: February 23, 2010
    Inventors: Albert W. Gebhard, Donovan J. Allen, Patricia A. Brew
  • Re-circulating Vacuum Apparatus for Cleaning Fabric and other Non-Tensioned Surfaces
    Publication number: 20080271282
    Abstract: An air re-circulating vacuum for cleaning loose fabric and other non-tensioned surfaces is disclosed. The vacuum has an air intake and an air exhaust located together inside an air space to create a turbulent flow to pull air and debris through an air flow space as the air flow space is pulled over the surface to be cleaned. The vacuum can be battery powered, or powered by plugging into a standard household current.
    Type: Application
    Filed: May 5, 2008
    Publication date: November 6, 2008
    Inventors: Albert W. Gebhard, Donovan J. Allen, Patricia A. Brew
  • Enhanced rising device with circular array of orifices
    Patent number: 5297739
    Abstract: An apparatus and process for impinging a fluid upon an object to be treated. A generally conical shaped flow of fluid is directed from a body which has an opening at the base of the cone against an object to be treated, and located so that fluid impinging on the object reflects upwardly therefrom in the direction of the opening and has a lifting effect on filamentary material, such as hair, located on the object.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: March 29, 1994
    Assignee: Torus Corporation
    Inventor: Donovan J. Allen
  • Pivotal colsure
    Patent number: 5079806
    Abstract: A closure for pliant containers, such as bags and the like, which has an elongated closure body and an elongated closure arm that are pivotally attached to pivot in parallel planes. The body forms a U-shaped slot to receive a portion of the arm so that a pliant container can be sealingly closed between the body and the arm when a portion of the arm is received within the U-shaped slot of the body.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: January 14, 1992
    Assignee: Lasso L. P.
    Inventor: Donovan J. Allen
  • Plant aerator tube
    Patent number: 4175356
    Abstract: A plant aerator tube includes an elongated tubular member having opposed ends with a central axial bore extending between and through the ends. A plurality of radial openings communicate the interior of the bore with the exterior surrounding of the tubular member with a number of the openings being disposed below the surface of a plant support media when implanted therein so that air from above the media level is delivered to the root system of the plant supported in the media.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: November 27, 1979
    Inventor: Donovan J. Allen
  • Closure for bags
    Patent number: D333431
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: February 23, 1993
    Assignee: Lasso L.P.
    Inventor: Donovan J. Allen