Patents by Inventor David I. Welt

David I. Welt 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: 4348034
    Abstract: A two-wheeled collapsible cart comprises a transverse bar having one wheel mounted on a caster fork beneath each opposite end thereof, a pair of symmetrically spaced bars pivotally mounted on the transverse bar providing therewith a collapsible platform and a pair of upstanding barrier bars. The bottom end of a lowermost section of an extendable leg of a camera tripod or unipod from which the non-slip cap has been removed is fitted with an element of a separable connector which engages a companion element mounted on a midportion of the transverse bar. Each spaced pivoted bar terminates in a downturned foot which cooperates with the wheels as a four point ground engaging support for the platform and the mounted upstanding tripod or unipod when the bars are in extended position.
    Type: Grant
    Filed: September 23, 1980
    Date of Patent: September 7, 1982
    Assignee: Welt/Safe-Lock, Inc.
    Inventor: David I. Welt