Abstract: A ventilation fan that functions as a wheel for movements. The generally cylindrical fan housing is pivotally coupled to a triangular handle. The handle may be manually grasped to roll the fan towards an operative position. The handle may be positioned in a temporary storage position, and an inverted, operative position where the drum is elevated for stable use. The drum-shaped fan rolls on its own, and the fan radius becomes the rolling radius. The preferred handle is attached to suitable bearings secured to the guards at the center of each side of the fan. When the destination is reached, the handle is deployed upside-down to function as a support stand, and the fan remains in a stable orientation without moving or shifting its position during operation.

Abstract: High volume, belt-driven ventilation fans in which the bladed propeller assembly and the drive motor are operationally mounted upon a unitary structure. In one form of the invention a box-fan comprises a generally cubicle, or parallelepiped housing. In an alternative barrel fan the tubular housing is cylindrical. Both fans comprise a pair of rigid, vertically upright, parallel rails within their interior. A rigid, X-profiled mounting unit is fastened between the rails to mount both the propeller and the motor. The unitary mount comprises a rigid, central mandrel that coaxially receives the propeller assembly axle. Pairs of diverging arms extending away from each side of the mandrel are fastened to the rails within the fan interior. One of the arms pivotally supports a deflectable wing upon which the motor is mounted. The propeller assembly comprises a pulley-driven blade centered within the housing and an axle captivated within the mandrel.

Abstract: A direct drive cooling fan employs a specially configured, X-shaped mounting chassis to securely mount the drive motor. The preferred fan comprises a parallelepiped housing protectively enclosing an internal subframe securing a drive motor and a propeller. A reinforcing edge circumscribes the housing front and rear to facilitate guard coupling. The subframe comprises two parallel elongated brackets, each formed of channel material. Each strut comprises several regularly spaced apart follower slots to which the X-shaped mounting chassis is mounted. The preferred mounting chassis comprises a pair of complimentary brackets welded to opposite sides the drive motor shell. The brackets comprise a curved, interior cradle that flushly mates with the circumferential periphery of the drive motor. The brackets have wings at either end of the cradle terminating in tabs laying parallel with the subframe brackets. An attachment hole on each tab allows for the attachment of the mounting chassis to the subframe brackets.

Abstract: A fan using tensionable safety guards combined with a universal subframe to enhance fan servicing. The preferred fan comprises a parallelepiped housing protectively enclosing an internal subframe securing a drive motor and fan propeller. A reinforcing edge circumscribes the housing front and rear to facilitate guard coupling. The edge comprises an angled brace adjacent to a peripheral lip penetrated by several spaced-apart slits. Fastener orifices penetrate the housing adjacent the slits. A displaceable clip resides in each slit. A clip anchor mates with a fastener that permits an operator to displace the clip outwardly and inwardly to selectively tension the safety guards that cover the housing front and rear. Each guard comprises a rectangular wire mesh. Each clip defines an arcuate cradle that captivates a portion of a safety guard. A transverse notch in each cradle captivates another portion of the guard to firmly seat it.

Abstract: A tube axle fan assembly comprising a tubular housing and resiliently deformable, convex guards that removably, snap fit to each fan end. A motor and associated components are mounted in the housing upon a bracket having two spaced-apart feet that form a triangular brace. A pivoted bracket mounts the motor such that the pull of gravity tends to tighten the drive belt entrained about the pulleys. The housing comprises a cylindrical, hollow body having input and output ends with diameters smaller than the guard outside diameter. A reinforcing channel is formed in each end of the housing to retain the seated guard. Each guard comprises a circular wire frame that assumes a dome-like configuration. Each guard has a series of radially spaced-apart spokes emanating from a central hub which must be arched to clear the smaller diameter of the housing. The spokes are reinforced by a continuous wire spiral that circumscribes the hub.

Abstract: A fan using tensionable safety guards combined with a universal subframe to enhance fan servicing. The preferred fan comprises a parallelepiped housing protectively enclosing an internal subframe securing a drive motor and fan propeller. A reinforcing edge circumscribes the housing front and rear to facilitate guard coupling. The edge comprises an angled brace adjacent to a peripheral lip penetrated by several spaced-apart slits. Fastener orifices penetrate the housing adjacent the slits. A displaceable clip resides in each slit. A clip anchor mates with a fastener that permits an operator to displace the clip outwardly and inwardly to selectively tension the safety guards that cover the housing front and rear. Each guard comprises a rectangular wire mesh. Each clip defines an arcuate cradle that captivates a portion of a safety guard. A transverse notch in each cradle captivates another portion of the guard to firmly seat it.

Abstract: A power-assisted lift platform for a chair includes a base, a lift frame, left and right side lift linkages and an electrically powered linear actuator connected between the base and the lift frame. The chair may be mounted to the lift frame. The lift linkages are pivotally connected at their forward ends to the base and at their rear ends to the lift frame. The lift linkages are arranged so that when the actuator is extended, the lift frame and chair are raised in a generally vertical path to reduce the fore-to-aft motion of the occupant's feet from the rest or seated position. While raising the occupant, the mechanism also tilts the occupant forwardly and transfers the occupant's center of gravity forwardly, more directly over his or her ankles to provide greater stability to the occupant in alighting from or entering the chair.