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Document |
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7487922 |
Windmill damper operator
A small windmill is provided upstream of a damper in an air duct. When air flows in the duct it rotates the windmill. The windmill shaft is connected by a cable to the damper operator through a...
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7089958 |
Damper vane
A damper unit for an air circulation system. The damper unit includes a frame defining an air flow opening, a damper vane for opening and closing the air flow opening, and a drive mechanism for...
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6895719 |
Floor-mounted disposable system with moveable dust loosening rib insert
A dust and debris disposal system has a floor-mounted housing adapted to be mounted over an opening formed in a floor for receiving debris particles swept thereto, and a set of dust loosening ribs...
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5595536 |
Shutter assemblies particularly adapted for use on yachts
A shutter assembly for an opening adapted to admit light and/or air. The shutter assembly utilizes laterally spaced base members that define a base plane which extends across the opening. The base...
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4643081 |
Louver system with adjustable slats, featuring removable modular slat clips
The louver system disclosed is of a basic type with adjustable-angle slats arranged between two uprights (1) provided with holes in which swivel mounts (3) are located for the receipt of clips (5)...
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4313650 |
Apparatus for controlling light and heat transference for greenhouses
Apparatus for controlling light and heat transference to and from a greenhouse comprising a plurality of light-weight, rigid, insulative, slats operable to be selectively opened or closed in...
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4203566 |
Air inlet control for aircraft or the like
An air inlet control inset in the skin or outer wall surface of an aircraft or the like. The control device has an open position in which it is able to capture ram air flowing over the wall surface...
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4199898 |
Closure apparatus with snap-in seal strips
A snap-in metal strip, longitudinally bent into a V shape with the upper ends of both arms of the V being turned outward to the horizontal, thus creating longitudinal lips on the strip, is used to...
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4175480 |
Wall ventilator construction
An improved ventilator construction for use in masonry wall openings to ventilate interior spaces of a building, such as a basement or crawl space of a home, wherein the ventilator construction is...
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4056048 |
Emergency ventilation means for confined livestock areas
An emergency ventilation means for confined livestock areas comprised of a plurality of louvered openings which are normally closed by means of electrical motors having a high gearing ratio. When...
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4038781 |
Jamb seal
A louver assembly has a plurality of louver blades and pivot shafts pivotally supported for adjustable movement between open and closed position in a frame which includes two opposed vertical side...
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3919814 |
Openable panel structure suitable for use either as roofing or as a curtainwall for buildings
Openable panel structure comprises a rectangular frame to which panels are hinged along their diagonal axes, in order to cause overlapping of the sides of two adjacent panels with respect to each...
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3874114 |
Plantbed cover assembly
Disclosed is a plantbed cover composed of two rectangular frames hinged together along one side margin and at their corners adapted to be fastened so that their hinged margin is above the opposite...
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3830146 |
VENTILATOR CONTROL SYSTEM
A system for controlling the ventilation of an enclosure such as a poultry or livestock house is disclosed. The system includes a ventilator mounted in a wall of the enclosure. Pressure difference...
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3528606 |
TEMPERATURE RESPONSIVE FOUNDATION VENTILATOR
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3426653 |
FOLDING LOUVERED CLOSURES
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3372514 |
Side sealing members for operating louver assemblies
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3366032 |
Damper apparatus including inflatable sealing member
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3350996 |
Adjustable fire louvre
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3346007 |
Gas flow control louvres
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3324785 |
Decorative shutter construction
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3287852 |
Louvered ventilator device
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3085491 |
Room ventilating apparatus
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3008520 |
Adjustable louvered ventilator
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2894445 |
Wind-responsive louver construction
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2834280 |
Louver
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2823600 |
Air control device for a building having air conditioning
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2789792 |
Louver type fences
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