Patents by Inventor Merle M. Sheriff

Merle M. Sheriff 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: 4541325
    Abstract: A telescopic hydraulic cylinder comprises a hollow base member arranged to be supported pivotally on a mount, as by trunnions, the base member including a removable end closure at its rearward end. The interior surface of the base member incorporates a set of machined grooves which removably mount a set of rings that act as a stop, a fluid seal, a bearing and a wiper for the largest of a plurality of telescoping cylinder stages each incorporating a similar set of internal machined grooves and rings which cooperate with the adjacent smaller stage. The smallest stage receives a piston closed at its forward end which mounts a connector for attachment to a load to be moved.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: September 17, 1985
    Assignee: Hydraulic Technology Corporation
    Inventor: Merle M. Sheriff
  • Patent number: 4516468
    Abstract: A double acting telescopic hydraulic cylinder comprises a hollow base member arranged to be supported pivotally and including a removably end closure at its inner end. The interior surface of the base member incorporates a set of machined grooves which removably mount a set of rings that act as a stop, a fluid seal, a bearing and a wiper for the largest of a plurality of telescoping cylinder stages each incorporating a similar set of internal machined grooves and rings which cooperate with the adjacent smaller stage. The smallest telescopic cylinder stage receives a hollow telescopic piston stage closed at its inner and outer ends. An internal groove on the inner end of each telescoping cylinder stage removably mounts a lifting ring for engaging the next smaller stage. An external groove on the inner end of each stage removably mounts a guide bearing ring for cooperation at its forward end with the stop ring of the adjacent larger stage.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: May 14, 1985
    Assignee: Hydraulic Technology Corporation
    Inventor: Merle M. Sheriff