Abstract: A personnel lift for use in spray booth systems having a partially enclosed work platform capable of X, Y, and Z axis mobility within the spray booth system and a flexible air supply conduit connecting the partially enclosed work platform to an air inlet manifold for supplying fresh air to the work platform.

Abstract: Apparatus for monitoring the speed of movement of at least one sash door of a laboratory fume hood is disclosed. The speed of movement of a sash door is detected and an alarm signal is generated if the speed of movement exceeds a predetermined value while increasing the size of the uncovered opening of the fume hood.

Abstract: A directional vent register having a primary grill in a generally conventional position in a top plate which pivots to expose and open a secondary grill which directs the air in a forward direction.

Abstract: An air vent for use in a motor vehicle passenger compartment, and in particular to an air vent with an air grill that can be rotated to a closed position. A housing has a first pivot bearing to which is connected a carrier with a second pivot bearing. An air grill with vanes has generally spherical peripheral surfaces and is connected to the second pivot bearing. The air grill may then be rotated about two orthogonal axes within the housing to vary the direction of the air flow entering the passenger compartment. The central vane has a circular periphery, and the air grill may also be rotated to a position in which this vane makes a seal with a compliant sealing section within the housing to close off the flow of air through the air vent.

Abstract: An apparatus reduces the harmful effects of environmental tobacco smoke when a person smoking tobacco and a non-smoking person occupy the interior of a motor vehicle. The apparatus has three components. The first component is a transparent plastic curtain that divides the interior of the motor vehicle into one area containing a smoking person and one area containing the non-smoking person. The second component is an electric exhaust fan that is hung in the area of the interior containing the smoking person. The third component is a tube running from the exhaust end of the fan to a location outside the interior of the motor vehicle.

Abstract: An adjustable damper for controlling air flow between portions of a building includes a plurality of vanes positioned in a frame opening, which vanes are selectively, simultaneously rotatable between open and closed positions. A reversible motor and an actuating linkage on one side of the damper drives a first vane axle about an axis, and a vane linkage on the opposite side, rotates the other vanes along with the first vane. The actuating linkage includes a shaft which is offset from the first vane axis, which shaft is turned by the motor between open and closed positions. A linkage arm pivotally connects the shaft and the vane axle and the linkage arm is bent at an angle such that, when the shaft is rotated to the closed position, the linkage arm is rotated to an over center position in which it securely latches the vanes in a closed position.

Abstract: A window fan capable of permitting the flow of air in one of at least three different patterns, including intake, exhaust and a simultaneous exchange of air. The fan includes a housing, having front section including a forward inner wall, and a back section having a rearward outer wall. The housing further includes a pair of opposed projecting side walls having an elongated opening. Positioned within the elongated opening within the side walls are a pair of side panel assemblies comprised of expandable, accordion-style side panels secured within a side panel frame. Directional air flow through the housing is effectuated through the use of at least one impeller having a plurality of blades, located within the housing, in combination with a pair of rotatable C-shaped ducts.

Abstract: An adjustable damper for controlling air flow from one area to another includes a rectangular frame forming an opening with a number of movable vanes positioned to selectively close off or open up the opening. Positioned between each pair of vanes in the frame is a stationary pitot-static sensing vane. Each pitot-static sensing vane can also be shaped as an air foil and includes an upstream chamber connected to a ram air input aperture and a downstream chamber connected to a downstream static aperture. Each of the chambers is connected to one portion of a pressure sensing instrument, such as, for example, a diaphragm type differential pressure sensor, in order to sense air flow velocity across the damper.

Abstract: A multipiece housing for a monitor having a first section with a plurality of projections, and a second section having a plurality of receptacles for receiving the plurality of projections during the assembly of the housing. Each receptacle includes an air duct enabling air to flow bidirectionally between outside the housing and inside the housing after being assembled. Separate sections of the multipiece housing are completely assembled by hand and without using any special tools. Each receptacle includes a pair of parallel guide rails and a slanted surface which guide each receptacle into a slot in the corresponding projection. Joints formed between the separate sections, while enabling air to pass, prohibit accidental access to the internal components of the monitor. Snap features are included on one of the sections to assist in securing together the first and second sections during assembly.

Abstract: A vent cover assembly for a side vent of a recreational vehicle which includes a frame to be mounted at the vent opening and a vent cover removably retained within the frame. The frame has a planar main wall which forms a rectangular-shaped central opening and rectangularly-shaped and vertically spaced apart air inlets at each lateral side of the central opening. The vent cover is removably retained within the central opening of the frame such that a front surface of the vent cover is co-planar with a front surface of the frame. The vent cover has a planar main wall which forms a plurality of rectangularly-shaped and vertically spaced apart air inlets. The air inlets of the frame effectively form extensions of the air inlets of the vent cover.

Abstract: A one-way flap-type vehicle ventilation valve comprises a generally planar molded plastic sealing flap for overlying a flow opening formed through a vehicle body panel. The flap is formed in a two shot molding process to have a rigid plastic main body with a resilient plastic seal lip about its periphery. A plastic support shaft is molded integrally with the main body and is spaced therefrom by integral support webs. A plastic support is pivotally joined to the support shaft by connecting portions of the bracket that are molded about the ends of the support shaft. Fasteners extend from the bracket for joining the valve to the vehicle body panel. The fasteners include end portions for passing through holes formed through the vehicle body panel adjacent the flow opening.

Abstract: A fail-safe closed damper for installation in a system of ducts. The damper includes at least one damper blade connected to a spring-loaded shaft. A power-actuated unit is employed to disengage a coupling which interconnects the spring-loaded shaft to an operating linkage. The use of the power-actuated unit ensures that the damper will be tripped at the appropriate predetermined temperature and will not be affected by the large frictional forces imparted on the components of the damper by the biasing spring or by such external factors as dust, humidity and dirt. The damper employs a sensor having dual sensing devices and which is centrally disposed in the duct to ensure receipt of a representative sample of airflow. The damper further includes a damper blade position indicator for sensing whether the damper blade is open or closed.

Abstract: A fabric air diffuser and a method for diffusing air comprises a frame adapted to be connected to the end of an air supply duct. Mounted within the frame is a flat, open-weave, fabric sheet. The fabric sheet redirects and scatters air passing through the openings in the weave by changing the direction and velocity of the air upon exiting the sheet.

Abstract: A portable and disposable operating environment including at least one substantially flexible material panel which is removably secured to a rigid support so as to define and drape over an operating area. The portable and disposable operating environment also includes at least one flow through passage which is structured to receive a supply of purified air therein and direct it into the operating area defined by the flexible material panel. The purified air is structured to continuously flow into at least one flow through passage defined in the flexible material panel so that there is continuous sterile air circulation within the operating area defined thereby.

Abstract: In order to be able to obtain in spite of individual adjustment possibilities for defined directions of air flow a uniform front design on the interior side that is not disturbed by different positions of deflecting fins or adjusting elements, deflecting fins (L1 to L6) behind a flow direction-neutral front baffle (F) can be driven into a corresponding dwelling position by a brief adjusting pivot motion with subsequent resetting of the front baffle (F).

Abstract: Two flap halves are made of a plastic material and are connected with one another to form a one-piece injection-molded part by means of a film hinge injection molded along a lateral edge of the two flap halves. The two flap halves are foldable together about a hinge axis of the film hinge and being fixable in this folded-together position by means of fixing elements.

Abstract: Apparatus and method for removing stale air from a residence or other enclosed space, and replacing that air with fresh air from outside the enclosed space. Stale air outlets are placed at the ceiling in one or more locations throughout the enclosed space and ducts connect those outlets to an air vent elevated in relation to the stale air outlets. An inlet air passage extends between a fresh air inlet located outside the enclosed space, and the air return side of a forced-air heating/cooling unit in the enclosed space. Warm air rises to the ceiling within the enclosed space, increasing in pressure and flowing through the stale air outlets to the relatively lower-pressure outside air. This air flow induces an inward flow of fresh air into the system. The outgoing and incoming air flows move through a heat exchanger, allowing thermal recovery of heat due to differential temperatures between the two air flows.

Abstract: A jet fan arrangement for ventilating tunnels and the like in which the axis of the fan is positioned at an angle to the supporting surface so as to blow air away from the supporting surface. When the flow of air through the fan is reversed, the angle of inclination of the axis of the fan is automatically changed so that the direction of flow of air remains away from the supporting surface.

Abstract: An automatic programmed ventilation control system for operating a fan includes a fan drive circuit; a duty, cycle control circuit including means for selecting a duty cycle and means for setting the selected duty cycle; a timing circuit including means for selecting the time of day and means for setting the selected time of day; a fan speed control circuit including means for selecting a fan speed and means for setting the selected fan speed; and a manual override switch circuit for overriding the set duty cycle and fan speed for operating the fan at a predetermined speed for a preselected period of time.

Abstract: A ventilator which includes a male member is telescopically received within a female housing. The male member is longer than the passage in the female housing such that the male member protrudes from the passage of the female housing. Radial air flow passages are positioned at both the first end and the second end of the male member. Relative movement of the male member and the female housing in a first direction diminishes the area of radial air flow passages exposed to air flow from the first end of the female housing while increasing the area of the radial air flow passages exposed to air flow from the second end of the female housing. Relative movement in a second direction diminishes the area of radial air flow passages exposed to air flow from the second end of the female housing while increasing the area of the radial air flow passages exposed to air flow from the first end of the female housing.