# US 8,770,923 B2 · Fan assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,923 B2 - Document ID: US8770923B2 - Status: Granted - Kind: B2 - Application number: 12/559,661 - Filed: 2009-09-15 - Published: 2010-03-18 - Granted: 2014-07-08 - Earliest claimed: 2008-09-15 - Applicants: Richard Stewart - Inventors: Richard Stewart - Web page: https://patentgrep.com/patent/US8770923B2 ## CPC - F04D 25/10: the unit having provisions for automatically changing direction of output air - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) ## Abstract One embodiment of a fan assembly includes a housing having a base member and a lip member extending outwardly from the base member for defining an enclosure. The fan assembly may further include a toothed track assembly, a wheel assembly, a first motor, a second motor, and a fan member. The toothed track assembly includes a toothed track member disposed within the enclosure. The wheel assembly includes a pair of toothed wheels adapted to move on the toothed track member. The first motor is operatively coupled to the wheel assembly and is capable of rotating the pair of toothed wheels. The fan member is coupled to the wheel assembly, such that the fan member moves along the toothed track member when the first motor rotates the pair of toothed wheels on the toothed track member. The second motor is operatively coupled to the fan member for rotating the fan member. ## Claims ### Claim 1 A fan assembly comprising: a housing comprising, a base member, and a lip member extending outwardly from a periphery of the base member for defining an enclosure therebetween; a toothed track assembly disposed within the enclosure of the housing, the toothed track assembly comprising a toothed track member; a wheel assembly comprising a pair of toothed wheels disposed within the enclosure of the housing and adapted to move on the toothed track member; a first motor disposed within the enclosure of the housing and operatively coupled to the wheel assembly, the first motor being capable of rotating the pair of toothed wheels in one of a first direction and a second direction opposite to the first direction on the toothed track member; a fan member disposed within the enclosure of the housing and coupled to the wheel assembly, such that the fan member moves along the toothed track member when the first motor rotates the pair of toothed wheels on the toothed track member; and a second motor disposed within the enclosure of the housing and operatively coupled to the fan member for rotating the fan member. ### Claim 2 (depends on 1) The fan assembly of claim 1, wherein the toothed track has a single row of teeth, and wherein the toothed wheels of the wheel assembly are rotatably mounted so as to be spaced apart along the single row of teeth. ### Claim 3 (depends on 2) The fan assembly of claim 2 wherein the first motor is positioned between the toothed wheels of the pair of toothed wheels of the wheel assembly. ### Claim 4 (depends on 1) The fan assembly of claim 1 wherein the wheel assembly comprises an engagement mechanism connecting the toothed wheels of the pair of toothed wheels. ### Claim 5 (depends on 3) The fan assembly of claim 3 wherein the engagement mechanism comprises a first connector connected to a first toothed wheel of the pair of toothed wheels, a second connector connected to a second toothed wheel of the pair of toothed wheels, and a first shaft member connecting the first and second connectors. ### Claim 6 (depends on 5) The fan assembly of claim 5, wherein the first and second connectors comprise respective first and second “C” shaped eyelets. ### Claim 7 (depends on 6) The fan assembly of claim 6 wherein the track assembly comprises a pair of opposed engagement rails, and wherein each of the first and second “C” shaped eyelets is slidably coupled to a respective engagement rail of the pair of engagement rails. ### Claim 8 (depends on 4) The fan assembly of claim 4, wherein the first motor is attached to the engagement mechanism. ### Claim 9 (depends on 1) The fan assembly of claim 1, wherein the toothed wheels are positioned so as to move within the housing. ### Claim 10 (depends on 1) The fan assembly of claim 1 wherein an axis of rotation of the fan member is spaced apart from an axis of motion of the wheel assembly along the track member. ### Claim 11 A fan assembly comprising: a housing; a fan member positioned within the housing; and fan member moving means contained within the housing, the moving means including a track member positioned within the housing, and a motor positioned within the housing and operatively coupled to the fan member and to the track member for moving the fan member along the track member from a first location within the housing to a second location within the housing different from the first location. ### Claim 12 (depends on 11) The fan assembly of claim 11 wherein the fan member moving means further comprises a wheel assembly contained within the housing and operatively coupled to the track member and to the motor so as to be moveable by the motor along the track member and wherein the fan member is coupled to the wheel assembly so as to move with the wheel assembly. ### Claim 13 (depends on 11) The fan assembly of claim 11 wherein the track member has a single row of teeth. ### Claim 14 (depends on 13) The fan assembly of claim 13 wherein the fan member is movably mounted within the housing so as to direct a flow of air from the fan member in a first direction, and wherein the teeth of the single row of teeth extend from the track member in the first direction. ### Claim 15 (depends on 13) The fan assembly of claim 13 wherein the wheel assembly includes a first toothed wheel and a second toothed wheel aligned with each other so as to engage the single row of teeth during movement of the wheel assembly. ### Claim 16 (depends on 11) The fan assembly of claim 11 wherein the fan assembly is a man-portable fan assembly.