Patents by Inventor John S. Eckersley

John S. Eckersley 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: 4650043
    Abstract: A telescopic hydraulic shock absorber including a base valve assembly having a valve body with three arcuate slots which lie between two concentric valve seats which are overlain by a flat annulus constituting a recuperation valve. This valve is normally held in contact with the valve seats by a recuperation valve spring. A passage of complex shape extends through the center of the valve body and the mouth of the passage at the lower end is surrounded by an annular valve seat. A compression valve pin with a shank cooperates with the valve seat to form a compression valve and the shank is guided in a valve guide located in a counterbore in the aperture. The valve guide comprises a solid ring portion having six integral projections. There is an annular clearance between the valve pin and the part of the passage which is in communication with an annular space between the ring portion and the part of the passage through the passageways between the projections of the valve guide.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: March 17, 1987
    Assignee: Jonas Woodhead Limited
    Inventor: John S. Eckersley