Patents by Inventor Allan B. Larson

Allan B. Larson 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: 5525295
    Abstract: A microbial barrier isolation system for enclosing and decontaminating equipment so that the equipment may be used in handling or otherwise contacting biologically-sensitive materials such as parenteral solutions and solids. The barrier system is formed with a lower cavity, an upper chamber separated from the inner cavity by filters, an air return conduit, means for supplying dry, heated air to heat the system and means for using steam and hydrogen peroxide to decontaminate the internal parts of the system. The decontamination process involves using dry air to heat the internal equipment of the system to reduce water condensation and then introducing saturated steam and peroxide at a positive pressure slightly above atmospheric pressure. The internal equipment, including all surfaces, is exposed to the steam and peroxide sterilant for a sufficient time to decontaminate the equipment and the system is cooled down with cool, sterile air.
    Type: Grant
    Filed: August 27, 1992
    Date of Patent: June 11, 1996
    Assignees: Despatch Industries Limited Partnership, TL Systems Corporation
    Inventors: Irving J. Pflug, Allan B. Larson, Hans L. Melgaard
  • Patent number: 4508148
    Abstract: A pharmaceutical filler apparatus (20) is disclosed. The pharmaceutical filler apparatus (20) cooperates with a conveyor (22) conveying containers to position each of the containers proximate a fluid delivery conduit (36) for receipt of fluid. The present invention further includes a reservoir (42) positioned above the containers at a predetermined height, the fluid being maintained in the reservoir at a constant level. The pharmaceutical apparatus (20) further includes a quick acting pinch valve (50) associated with the fluid delivery (36) for opening and closing the fluid delivery conduit (36). The pinch valve apparatus (50) includes a biasing spring (98) for biasing a valve apparatus (50) into a first position whereby the fluid delivery conduit (36) is closed. A cam actuator apparatus (54) cooperates with the pinch valve apparatus (50) to position the pinch valve (50) in a second position whereby the fluid delivery conduit (36) is opened.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: April 2, 1985
    Assignee: TL Systems Corporation
    Inventors: Hans W. Trechsel, Allan B. Larson, John A. Ryerse