Apparatus for securing a closure Patent #: 4745708
ApplicationNo. 272071 filed on 11/16/1988
US Classes:49/395, Plural; e.g., gang34/242, Chamber seals49/402Closure overlies portal frame
ExaminersPrimary: Bennett, Henry
Assistant: Sollecito, John M.
Attorney, Agent or Firm
International ClassE05C 009/00
AbstractA door for sealing an aperture in a heated, pressurized chamber to prevent passage of gases through the aperture. A flexible door plate is sized to cover the aperture. A door frame is provided with frame members positionable around the circumference of one face of the door plate. Releasable fasteners are provided for releasably fastening the door plate and the door frame over the aperture to sandwich the door plate between the aperture and the door frame. A plurality of adjustable tightening members are disposed at intervals around the door frame for adjustably tightening the door frame against the door plate at each such interval.