Patents by Inventor Hoshang H. Presswalla

Hoshang H. Presswalla 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).

  • Post-tensioned floor with in-floor distribution system
    Patent number: 4627203
    Abstract: This disclosure relates to a floor construction comprising a concrete slab which is supported adjacent its edges of the slab. A plurality of cellular raceways are embedded in the slab, and at least one intermittently bottomless trench runs across the raceways. The trench is located along a line where the bending moment on the slab is substantially zero. The construction further comprises a plurality of post-tensioned tendons which extend across the slab, underneath the trench and between the raceways.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: December 9, 1986
    Assignee: INRYCO, Inc.
    Inventors: Hoshang H. Presswalla, Yale R. Shea