Patents by Inventor Leo I. St. Martin, Jr.

Leo I. St. Martin, Jr. 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).

  • Low flow control valve
    Patent number: 4434965
    Abstract: Low flow control valve having contoured cylindrical plug means cooperating with a semi-elastic sleeve, the latter being suitably retained within a valve orifice capable of providing not only tight shut-off, but also no clearance between said valve plug and orifice when the plug is retracted so that all fluid passes by a profiled portion of said plug. Said sleeve type sealing means is further pressure assisted by line fluid to enhance the aforementioned sealing capability.
    Type: Grant
    Filed: January 22, 1982
    Date of Patent: March 6, 1984
    Assignee: H. D. Baumann Assoc., Ltd.
    Inventor: Leo I. St. Martin, Jr.