Patents by Inventor Jon N. Nelson

Jon N. Nelson 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: 4900217
    Abstract: The present invention provides a stowable, multiple grade ramping device particularly adapted for use in pick-up trucks. The ramping device includes a carrier assembly, an entryway extension unit and a ramp end section for loading and unloading cargo thereupon. The carrier assembly is advantageously equipped with an enclosed trackway having a beveled ramping guide for elevating track following guides mounted onto an entryway extension unit and an open trackway for engaging track following guides mounted onto the ramp end section. The cargo assembly beveled track guides impart an intermediate ramping grade to the entryway unit. The entryway unit is fitted with a pair of enclosed track guides. The ramp end section is equipped with track following guides slideably engaging onto the enclosed entryway track guides which permits the entryway unit and ramp end section to telescopically retract for effective stowage thereof.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: February 13, 1990
    Inventor: Jon N. Nelson
  • Patent number: 4497137
    Abstract: A composite weather strip is disclosed having a semi-rigid elongated body and a relatively flexible extension formed in integral coplanar relation on a side edge of the body. The extension is laterally tapered to a feathered edge and has longitudinal ribs projecting from one surface of the extension. A foam tape attaches the body to one of two relatively movable surfaces, such as a frame surface and an adjoining surface of a window or door, adjacent a joint between the two surfaces. Whenever the window or door is closed, the flexible extension is engaged with the other of the two surfaces and, upon such engagement, is deflected to provide a positive seal against the passage of air through the joint in a sealing construction of exceptionally high integrity.
    Type: Grant
    Filed: October 5, 1982
    Date of Patent: February 5, 1985
    Assignee: Energy Conservation Associates Incorporated
    Inventor: Jon N. Nelson