A power vent is disclosed including a housing assembly having a base and a cylindrical, open ended shroud joined to the base and within which is supported a fan assembly. A wire frame is molded into the inner peripheral surface of the shroud to reinforce the shroud and also provide a bracket for supporting the motor of the fan assembly. A molded plastic hood including hood support brackets is securable to the shroud so that the assembly may be employed as a roof vent. In another embodiment, the base of the housing may be shaped to receive a louver assembly and the assembly may be used as a gable end vent.
An apparatus for mounting a portable ventilation fan at an access port in the wall of an enclosure. The apparatus comprises a fixable base plate having a first opening extending therethrough, and which is detachably mounted to the port with the first opening in alignment with the port opening. A swing plate having a second opening extending therethrough is pivotably coupled to the base plate for pivotal movement between a closed position in which the first and second openings are aligned and an open position. The fan is detachably coupled to the swing plate so that the fan is in alignment with the second opening, whereupon when the swing plate is in the closed position, the fan is operable to promote a flow of air through the access port via the first and second openings. A retaining mechanism yieldably retains the swing plate in the closed position so as to resist fan reactionary forces tending to pivotably displace the swing plate from the closed position, while permitting the swing plate to be readily pivoted to the open position by personnel seeking to enter or exit the enclosure via the access port in an emergency.
A readily portable fan device which is usable both as a cooling fan for circulating ambient air and as a device for increasing the flow of air through a register, comprises a housing containing both a fan impeller and an electric motor for driving the impeller, the housing having a skirt surrounding a bottom air inlet and capable of at least partially sealing a space around such register, the fan directing air upwardly through an outlet aperture when resting on the skirt. The device has another floor engaging surface perpendicular to the plane of the skirt on which the device may rest with its air inlet open to the ambient air. The impeller blades and the outlet aperture are specially designed to maximize air throughput.
A whole house ventillator which can be installed without framing and cutting joists. Struts below the fan blade serve as a support for a fan motor and for a venturi. Adjustable pre-cut sleeving fits over the joists and around the fan to eliminate framing. A shutter assembly may be surface-mounted to the ceiling below the joists.
A whole house attic ventilating fan is disclosed which is installable within an opening in the ceiling of the house from below. A plenum box is installable against the attic-side of the ceiling sheathing in register with the opening with the plenum box having a venturi opening therein. A venturi is secured to the top of the plenum box and a fan motor and fan assembly is mounted within the venturi, the fan assembly being secured to a pair of joists by means of arms extending outwardly through openings in the venturi. The plenum box may fit between adjacent joists or may accommodate one or more joists if these joists extend across the opening in the ceiling. A method of installing the fan within the ceiling from below without the necessity of access to the attic crawl space is also disclosed.
A device comprising a rotor and fan rotatably mounted on a shaft which is rigidly fixed relative to a vehicle surface. The device is fixable on a vehicle surface by means of two clamping portions which are moveable towards each other along the shaft to press against a surface between them.
