Patents by Inventor Chanchal M. Singh

Chanchal M. Singh 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: 6183106
    Abstract: A flashlight bulb is mounted to a cylindrical bulb chassis such that the base of the light bulb is spaced apart from the top surface of the bulb chassis. A layer of resilient silicone material is positioned in the clearance space between the space-dapart base of the light bulb and the front surface of the bulb chassis to provide cushioning for axial and radial movement of the light bulb. A heat resistant resilient O-ring is inserted in an enlarged rear portion of the central bore of a reflector housing such that the internal surface of the O-ring slip fits around the cylindrical body of the light bulb to cushion the light bulb for radial movements of the light bulb and so that the light bulb remains mechanically and optically aligned with the central axis. For good cushioning the durometer of the O-ring is between 60-70 and the durometer of the silicone layer is between 50-60.
    Type: Grant
    Filed: March 4, 1999
    Date of Patent: February 6, 2001
    Assignee: Streamlight, Inc.
    Inventors: Heinz F. Thummel, Robert S. Szemeredi, Chanchal M. Singh