Patents by Inventor Michael C. Blaha

Michael C. Blaha 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: 5103528
    Abstract: A refrigration, foam sealing bushing is provided for use within a refrigeration door cavity. The bushing is formed of a male member, and a female member. The male member includes a head portion, an upper shank portion, a reduced lower shank portion, and a disc-like member. The female member is formed of a tubular section having an open upper end and an open lower end. The tubular section has an axially extending bore which extends between the open upper end and the open lower end for telescopingly receiving the lower shank portion of the male member. Passageways are formed between the outer surface of the reduced lower shank portion and inner surface of the axially extending bore of the tubular section for permitting air to escape from the door cavity but yet preventing foam insulation from escaping during the injection of the foam insulation into the door cavity.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: April 14, 1992
    Assignee: Illinois Tool Works Inc.
    Inventors: William J. Olson, James S. Zielinski, Michael C. Blaha