Patents by Inventor Zubin P. Daruwala

Zubin P. Daruwala 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).

  • Pneumatic tool having noise reducing muffling structure
    Patent number: 5418339
    Abstract: The present invention relates to a pneumatic tool having superior sound muffling performance. The pneumatic tool has an exhaust port, wherein a sound muffling structure comprising a nonwoven web of fibers coated with a binder resin, is fitted in said exhaust port to seal said exhaust port, wherein said fibers have diameters of about 30 to about 100 microns and wherein the web has a compression resistance energy of about 0.09 to about 0.14 Joules.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: May 23, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gloria D. Bowen, Zubin P. Daruwala, David W. Hegdahl, Thomas J. Scanlan, Jeffrey W. McCutcheon