Patents by Inventor Allan Louis Lorenc

Allan Louis Lorenc 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).

  • Slotted spool valve
    Patent number: 6810664
    Abstract: A slotted spool valve for a speed control apparatus offering rapid response to prevent speed searching and cogging at low speed settings. Round port spool valve arrangements are replaced with a valve arrangement having rectangular-shaped ports. Response of the rectangular-shaped ports provides for rapid and sufficient fluid flow or bypass with less movement of a control shaft than that required for use with round port spool valve arrangements.
    Type: Grant
    Filed: November 4, 2002
    Date of Patent: November 2, 2004
    Assignee: Rawson Control Systems, Inc.
    Inventor: Allan Louis Lorenc