1990-08-31
1991-08-27
Makay, Albert J.
981151, E06B 702
Patent
active
050423673
ABSTRACT:
A revolving air lock controls the flow of air, and the passage of contaminants that may be entrained in the air, between two separate areas. The air lock comprises a base, a vertical shaft rotatably connected to the base at one end, and a bearing support apparatus to which the other end of the shaft is rotatably connected. At least two arcuate walls, having an axis generally coaxial with the axis of the shaft, are located generally concentric to and spaced apart from the shaft. The walls are configured to define at least two segments whereby entrance and exit to the air lock may be obtained. Each wall is connected to the bearing support apparatus and to the base with at least one of the walls having at least one aperture therethrough. A panel assembly comprises a plurality of panels with the inner edge of each panel connected to the shaft, such that each panel extends generally radially outwardly therefrom. A panel top edge engaging structure engages the top edges of the panels, providing a top end which closes that end of the air lock. Upon rotation of the shaft the outer edges of each pair of adjacent panels will be moved in a position adjacent to one wall to define the walls of a chamber. The top of the chamber is closed by the top end, and the bottom of the chamber is closed by a slidable engagement between the panel bottom edges and the base. An air mover, connected in air flow communication to the aperture, removes from the chamber a portion of the air particles entrained when that chamber includes that portion of the wall containing an aperture.
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patent: 4598495 (1986-07-01), Labarile
"Unit Heater Over Revolving Door Solves Entrance Heating Problem", by John G. Eadie, Heating Piping and Air Conditioning, May 1940.
Doerrler William C.
Makay Albert J.
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