US4508958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling fan with heating apparatus
Assignee: WING TAT ELECTRIC MANUFACTURING Co Ltd A Co OF HONG KONG
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Filing: 1982-12-16
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Granted: 1985-04-02
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Expires: 2002-12-16
Abstract
Abstract An improved ceiling fan including a housing to be hung down from a ceiling and a motor having a stationary stator and a rotatable rotor which rotates a number of blades to create a stream of air. One or more electrical heating elements are positioned within the housing and around the outside of the rotor. A radial fan arrangement generates a flow of air through the housing, over the heating elements, and out into the stream of air created by the rotation of the blades.
Inventors
- 👤 Frederick S. C. Kan
- 👤 Kam Wing Li
- 👤 Kong Ping P. Lau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/088
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
129 words
A ceiling fan for optionally heating or cooling a room comprising a housing adapted to be suspended from a ceiling and including an aperture arranged so that air can flow through the housing; a motor disposed within the housing and having a stationary stator and a rotatable rotor; a selectively energizable electric heating element disposed within the housing and spaced from the motor; first fan means attached to the rotor and disposed exteriorly of the housing for generating a relatively large volume air flow on the exterior of the housing; and second fan means for generating a relatively small volume flow and positioned to pass the small volume air flow over the heating element and through the housing aperture so that the small volume air flow can be heated.
Claim 2
Dependent Claim
129 words
A ceiling fan for optionally heating or cooling a room comprising a housing adapted to be suspended from a ceiling and including an aperture arranged so that air can flow through the housing; a motor disposed within the housing and having a stationary stator and a rotatable rotor; a selectively energizable electric heating element disposed within the housing and spaced from the motor; first fan means attached to the rotor and disposed exteriorly of the housing for generating a relatively large volume air flow on the exterior of the housing; and second fan means for generating a relatively small volume flow and positioned to pass the small volume air flow over the heating element and through the housing aperture so that the small volume air flow can be heated.
Claim 3
Dependent Claim
31 words
A ceiling fan as claimed in claim 1 wherein said second fan means is connected to the rotor of said motor such that said second fan means rotates with said rotor.
Claim 4
Dependent Claim
55 words
A ceiling fan as claimed in either claim 1 or claim 2 wherein said second fan means comprises a radial fan element positioned within the housing and around the outside of the motor so that air passes over the heating elements and is emitted into the stream of air generated by said first fan means.
Claim 5
Dependent Claim
35 words
A ceiling fan as claimed in claim 3 wherein the flow of air through the housing is emitted in a tangential and radial direction into the stream of air generated by the first fan means.
Claim 6
Dependent Claim
46 words
A ceiling fan as claimed in claim 1 wherein said first fan means includes blades mounted on said rotor such that they rotate above the area where the heated air is emitted from the housing aperture, causing the heated air to move in a downward direction.
Claim 7
Dependent Claim
46 words
A ceiling fan as claimed in claim 1 wherein the first fan means includes blades mounted on the rotor such that they rotate below the area where the heated air is emitted from the housing aperture, causing the heated air to move in an upward direction.
Claim 8
Dependent Claim
121 words
A ceiling fan comprising a housing adapted to be suspended from a ceiling and including an aperture arranged so that air can flow through the housing; a motor disposed within the housing and having a stationary stator and a rotatable rotor; an electric heating element disposed within the housing and spaced from the motor; first fan means attached to the rotor and disposed exteriorly of the housing for generating a relatively large volume air flow on the exterior of the housing; and second fan means for generating a relatively small volume air flow and positioned to pass the small volume air flow over the heating element and through the housing aperture so that the small volume air flow can be heated.
Claim 9
Dependent Claim
121 words
A ceiling fan comprising a housing adapted to be suspended from a ceiling and including an aperture arranged so that air can flow through the housing; a motor disposed within the housing and having a stationary stator and a rotatable rotor; an electric heating element disposed within the housing and spaced from the motor; first fan means attached to the rotor and disposed exteriorly of the housing for generating a relatively large volume air flow on the exterior of the housing; and second fan means for generating a relatively small volume air flow and positioned to pass the small volume air flow over the heating element and through the housing aperture so that the small volume air flow can be heated.
Claim 10
Dependent Claim
29 words
A ceiling fan as claimed in claim 7 wherein said second fan means is connected to the rotor of said motor such that said means rotates with said rotor.
Claim 11
Dependent Claim
54 words
A ceiling fan as claimed in either claim 7 or claim 8 wherein said second fan means comprises radial fan element positioned within the housing and around the outside of the motor so that air passes over the heating elements and is emitted into the stream of air generated by said first fan means.
Claim 12
Dependent Claim
36 words
A ceiling fan as claimed in claim 9 wherein the flow of air through the housing aperture is emitted in a trangential and radial direction into the stream of air generated by the first fan means.
Claim 13
Dependent Claim
46 words
A ceiling fan as claimed in claim 7 wherein said first fan means includes blades mounted on said rotor such that they rotate above the area where the heated air is emitted through the housing aperture, causing the heated air to move in a downward direction.
Claim 14
Dependent Claim
46 words
A ceiling fan as claimed in claim 7 wherein the first fan means includes blades mounted on the rotor such that they rotate below the area where the heated air is emitted from the housing aperture, causing the heated air to move in an upward direction.
Claim 15
Dependent Claim
38 words
The ceiling fan of claim 7 wherein said first fan means comprises a number of fan blades rotatable by said rotor, said blades including supplementary portions of increased angularity disposed towards the center of rotation of said blades.
Claim 16
Dependent Claim
142 words
A ceiling fan for optionlly heating and cooling a room comprising a housing adapted to be suspended from a ceiling and including a plurality of apertures arranged so that air can flow through the housing; a motor disposed within the housing and having a stationary stator and a rotatable rotor; an electric heating element disposed within the housing and spaced from the motor; first fan means attached to the rotor and disposed exteriorly of the housing for generating a relatively large volume air flow on the exterior of the housing; second fan means for generating a relatively small volume flow and positioned to pass the small volume air flow over the heating elements and through the housing apertures; and means for energizing and deenergizing the heating element independently of the motor so that the small volume air flow can be optionally heated.
Claim 17
Dependent Claim
142 words
A ceiling fan for optionlly heating and cooling a room comprising a housing adapted to be suspended from a ceiling and including a plurality of apertures arranged so that air can flow through the housing; a motor disposed within the housing and having a stationary stator and a rotatable rotor; an electric heating element disposed within the housing and spaced from the motor; first fan means attached to the rotor and disposed exteriorly of the housing for generating a relatively large volume air flow on the exterior of the housing; second fan means for generating a relatively small volume flow and positioned to pass the small volume air flow over the heating elements and through the housing apertures; and means for energizing and deenergizing the heating element independently of the motor so that the small volume air flow can be optionally heated.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-01 | 1988-10-01 | 1989-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-01 | 1992-10-01 | 1993-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-01 | 1996-10-01 | 1997-04-02 | $7700.00 | Window Closed / Lapsed |