# US 2013/0156582 A1 · Rotation control device of multi-rotor ceiling fan

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- Number: US 2013/0156582 A1
- Document ID: US20130156582A1
- Status: Published application
- Kind: A1
- Application number: 13/331,669
- Filed: 2011-12-20
- Published: 2013-06-20
- Earliest claimed: 2011-12-20
- Inventors: Cliff WANG
- Web page: https://patentgrep.com/patent/US20130156582A1

## CPC

- F04D 25/088: {Ceiling fans}
- F04D 25/105: {by changing rotor axis direction, e.g. oscillating fans (interconnecting rotary motion and oscillating motion F16H)}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A rotation control device of a multi-rotor ceiling fan includes a fixed unit. The fixed unit is provided with a fixed gear. The fixed unit is pivotally connected with a movable unit. A driving member is fixed to the movable unit. The driving member has a driving gear. The driving gear meshes with the fixed gear. The driving member is provided with at least one pair of support rods. The distal ends of the support rods are respectively connected with a fan. The driving member brings the movable unit to turn at a constant speed relative to the fixed unit for the fans to revolve round the fixed unit, producing stable airflow to the surrounding by 360-degree rotation.

## Claims

### Claim 1

A rotation control device of a multi-rotor ceiling fan, comprising:
a fixed unit having a housing, the housing having an accommodation room and an opening at one side thereof, the housing further having an axial hole at another side thereof, the fixed unit comprising a shaft connected to the axial hole, the shaft being provided with a power supply portion;
a fixed gear fixed to the fixed unit, the fixed gear having a fixed toothed portion which is disposed round the shaft;
a movable unit comprising a seat member which is pivotally connected to the shaft, the movable unit comprising at least one pair of support rods extending outward from the seat member and disposed relative to the shaft, distal ends of the support rods being respectively connected with a fan, the seat member of the movable unit being provided with a load portion, the load portion getting contact with the power supply portion; and
a driving member fixed to the movable unit and having a motor, the motor being electrically connected to the load portion, the motor being further connected with a driving gear, the driving gear having a driving toothed portion, the driving toothed portion meshing with the fixed toothed portion.

### Claim 2 (depends on 1)

The rotation control device of a multi-rotor ceiling fan as claimed in claim 1, wherein the fixed gear is an annular member, the annular member having an outer annular surface and an opposing inner annular surface, the outer annular surface of the annular member being fixed to the opening of the housing, the inner annular surface having the fixed toothed portion thereon.

### Claim 3 (depends on 1)

The rotation control device of a multi-rotor ceiling fan as claimed in claim 1, wherein the fixed gear is a disc member, the disc member having a through hole at a central portion thereof for connection of the shaft, the disc member being fixed to the shaft, the disc member having the fixed toothed portion around an outer wall thereof.