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US 6,000,910 AGranted
Electric fan
AssigneeYoung Jun Ahn
InventorSoon Suk Ahn
Life of this patent
Estimating the term…
Abstract
The present invention relates to an electric fan employing three impellers which are so implemented as to receive the driving force of the motor and, more particularly, to an electric fan equipped with the second crank device and the convex surfaced driving bevel friction wheel and driven bevel friction wheel to swing the fan impeller shaft up-down repeatedly and right or left simultaneously, and to an electric fan that has the carrying handle or the carrying handle with the wheels for the convenience of moving, and also to an electric fan that can separate the upper body from the lower body to establish itself as a short up-right standing type, an attache-to-ceiling type, or an attach-to-wall type, and to an electric fan that can get rid of blowing reaction by a stabilizer and, thus, stabilize the swing movement of the fan impeller.
Claims32
An electric fan comprising an upper body and a lower body which is removably attached to said upper body as a support, said upper body comprising:
- a cylindrical housing including a housing axis, an upper plate, a middle supporting plate, and a lower plate, said plates extending perpendicular to said housing axis and being spaced from each other along said housing axis, and a wall plate which circumscribes an outer circumference of each of said upper, middle and lower plates;
- a driving motor including an upper driving shaft and a lower driving shaft, said driving motor being coaxially mounted to the axis of said housing and secured between said upper plate and said middle supporting plate, wherein a free end of the upper driving shaft passes through said upper plate and extends out of said housing, and said lower driving shaft extends downward and passes through said middle supporting plate;
- a rotary disk including a trident flange and a cylindrical part turnably mounted around said upper driving shaft;
- a plurality of fan impeller shafts arranged at an angle to the upper driving shaft of the motor for receiving a driving force from the upper driving shaft;
- base brackets pivotally secured to the flange of said rotary disk for supporting a respective one of the fan impeller shafts;
- fan clutch devices arranged at said base brackets so that each of the fan impeller shafts can independently receive the driving force of said upper driving shaft;
- a motor clutch device located between said middle supporting plate and said lower plate of the housing for selectively transmitting a driving force of said lower driving shaft to a first crank device;
- said first crank device being capable of making said rotary disk swing orthogonally around said upper driving shaft;
- a stabilizer for countering a blowing reaction force of a plurality of fan impellers and for stabilizing a swing movement of the fan impellers;
- and
- a control switch including an interrupting electric connector mounted on one side of said housing;
- and
- said lower body comprising:
- a substantially flat base plate for supporting the weight of said upper body;
- and
- a supporting rod comprising a lower hollow cylindrical member fixedly secured to a central portion of said base plate, an extendible upper cylindrical member inserted into said lower cylindrical member, a compression spring arranged beneath said extendible upper cylindrical member, and an upper end of said upper cylindrical member being removably secured to a central portion of the lower plate of the housing.
13 more elements
An electric fan comprising:
- a cylindrical housing including a housing axis, an upper plate, a middle supporting plate, and a lower plate, said plates extending perpendicular to said housing axis and being spaced from each other along said housing axis, and a wall plate which circumscribes an outer circumference of each of said upper, middle and lower plates;
- a driving motor including an upper driving shaft and a lower driving shaft, said driving motor being coaxially mounted to the axis of said housing and secured between said upper plate and said middle supporting plate, wherein a free end of the upper driving shaft of the motor passes through said upper plate and extends out of said housing, and said lower driving shaft extends downward and passes through said middle supporting plate;
- a rotary disk including a trident flange and a cylindrical part turnably mounted around said upper driving shaft;
- a plurality of fan impeller shafts arranged at an angle to the upper driving shaft of the motor for receiving a driving force from the upper driving shaft;
- base brackets that are pivotally secured to the flange of said rotary disk for supporting a respective one of the fan impeller shafts;
- fan clutch devices arranged at said base brackets so that each of the fan impeller shafts can independently receive the driving force of said upper driving shaft;
- a motor clutch device located between said middle supporting plate and said lower plate of the housing for selectively transmitting a driving force of said lower driving shaft to a first crank device;
- said first crank device being capable of making said rotary disk swing orthogonally around said upper driving shaft of the motor;
- a stabilizer for countering a blowing reaction force of a plurality of fan impellers and for stabilizing a swing movement of the fan impellers;
- a plurality of carrying handles centered around the housing axis and foldably secured on a bottom of said lower plate of the housing;
- and
- a control switch including an interrupting electric connector mounted on one side of said housing.
9 more elements
An electric fan comprising an upper body and a supporting bracket which is removably secured on said upper body, said upper body comprising:
- a cylindrical housing including a housing axis, an upper plate, a middle supporting plate, and a lower plate, said plates extending perpendicular to said housing axis and being spaced from each other along said housing axis, and a wall plate which circumscribes an outer circumference of each of said upper, middle and lower plates;
- a driving motor including an upper driving shaft and a lower driving shaft, said driving motor being coaxially mounted to the axis of said housing and secured between said upper plate and said middle supporting plate, wherein a free end of the upper driving shaft passes through said upper plate and extends out of said housing, and said lower driving shaft extends downward and passes through said middle supporting plate;
- a rotary disk including a trident flange and a cylindrical part turnably mounted around said upper driving shaft;
- a plurality of fan impeller shafts arranged at an angle to the upper driving shaft of the motor for receiving a driving force from the upper driving shaft;
- base brackets pivotally secured to the flange of said rotary disk for supporting a respective one of the fan impeller shafts;
- fan clutch devices arranged at said base brackets so that each of the fan impeller shafts can independently receive the driving force of said upper driving shaft;
- a motor clutch device located between said middle supporting plate and said lower plate of the housing for selectively transmitting a driving force of said lower driving shaft to a first crank device;
- said first crank device being capable of making said rotary disk swing orthogonally around said upper driving shaft;
- a stabilizer for countering a blowing reaction force of a plurality of fan impellers and for stabilizing a swing movement of the fan impellers;
- a control switch including an interrupting electric connector mounted on one side of said housing;
- and
- a supporting bracket comprising an attaching member operatively connected to said upper body for hanging said upper body to a wall or a ceiling.
9 more elements
Dependencies are inferred from the claim text.