Patents Assigned to H. D. Baumann Assoc., Ltd.
  • 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.