Patents by Inventor Donald W. Sharp

Donald W. Sharp 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).

  • Adjustable jack for mounting on a duct bend
    Patent number: 4781401
    Abstract: The invention comprises an economical, adjustable duct section which allows an installer to mount and connect a curved end thereof to an opening in an air duct bend and to adjust the other end to a desired predetermined angle with respect to the horizontal. The invention makes it more feasible to install a second air handler on an outlet duct bend of a first air handler for augmenting an output of the first air handler on the roof of a building or the like. It provides an easily made water and weather tight seal between the assembled units.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: November 1, 1988
    Assignee: Reynalda Clack
    Inventor: Donald W. Sharp
  • Adjustable roof jack
    Patent number: 4526091
    Abstract: The invention comprises an economical, adjustable roof jack for connecting a roof mounted air handler to an air duct therebelow, wherein a single sheet metal pattern comprises a portion of a lower and upper section of duct and wherein the duct sections are connected, each to the other, by means of a sheet metal bend hinge in the single sheet metal pattern thereby allowing adjustment of the angle between the upper and lower duct sections and providing a water and weather tight seal along the hinge line therebetween.
    Type: Grant
    Filed: August 2, 1984
    Date of Patent: July 2, 1985
    Assignee: Reynalda Clack
    Inventor: Donald W. Sharp