Patents by Inventor K. V. Unnikrishnan

K. V. Unnikrishnan 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).

  • Spring loaded piston seal and valving component for shock absorbers, Macpherson struts and the like
    Patent number: 4775038
    Abstract: A piston valving and seal mechanism is for a fluid shock absorbing device. A piston is mountable on a piston rod of the device. The piston has an outer periphery, rebound chamber face and compression chamber face. A piston seal is movably mounted in a groove where the piston rebound chamber face and outer periphery meet. The seal is adjacent compression passages in the outer periphery. A seal retainer plate along the piston rebound chamber face with a backing spring bias the seal. The plate is raised from the rebound chamber face and includes passages through the plate for fluid flow through the plate and into underlying recoil passages in the piston. The seal acts as a check valve for the compression passages. A separate recoil passage valve plate on the compression chamber face, with a backing spring, acts as a valve for the recoil passages.
    Type: Grant
    Filed: October 30, 1986
    Date of Patent: October 4, 1988
    Assignee: Maremont Corporation
    Inventors: K. V. Unnikrishnan, Charles Goldstein, Raymond R. Loikets