Patents by Inventor Howard J. Kopel

Howard J. Kopel 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).

  • Sealed unit for hydraulic lifter
    Patent number: 4561393
    Abstract: Sealed system hydraulic valve lifters wherein pressurized gas functions as the takeup spring. The sealed system allows great choice in the hydraulic fluid.
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: December 31, 1985
    Inventor: Howard J. Kopel
  • Hydraulic lifter train clearance control systems, elements and processes
    Patent number: 4466280
    Abstract: The functions of the hydraulic valve lifters here discussed are to automatically compensate for dimensional changes that occur in mechanisms such as valve trains found in internal combustion engines. The lifters accomplish this by locking a noncompressible fluid (oil) in a chamber to cause the push rod assembly to become solid enough to overcome the valve spring and the other included forces and to open the valve. This invention also provides that an engine may be tested at the location in which it is operated and a lifter mechanism provided with a helical orifice having an appropriate length on a plug assembly.
    Type: Grant
    Filed: June 2, 1982
    Date of Patent: August 21, 1984
    Inventor: Howard J. Kopel