Patents by Inventor Lloyd W. Braa

Lloyd W. Braa 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).

  • Drum and cable mechanisms for opening/closing greenhouse vent
    Patent number: 4630397
    Abstract: A control mechanism for opening and closing a window sash or like element pivotally mounted in a frame. The mechanism has a drive member mounted for rotation with an elongated drive shaft and a housing mounted on the drive member for rotation relative to the drive member and the elongated shaft. The housing includes a retaining mechanism which is subtended by a first portion of the drive member. A rod for reciprocating movement in response to rotation of the drive member is located between the retaining mechanism and the first portion of the drive member and held in direct contact with the drive member by the retaining mechanism.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: December 23, 1986
    Assignee: Roper Corporation
    Inventors: George J. Dean, Jr., Robert S. Klaeser, Lloyd W. Braa