US3724092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable hair dryer
Assignee: Hamilton Beach Inc
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Filing: 1971-07-12
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Granted: 1973-04-03
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Expires: 1991-07-12
Abstract
Abstract A portable hair dryer having a base generally comprising a molded casing housing a motor and centrifugal fan assembly, a heater element, air inlet openings for receiving ambient room air and delivering it to a duct connected to an air chamber having a plurality of outlet openings and contoured to receive the head of hair to be dried. The centrifugal fan is characterized by a plurality of radially extending upper blades and lower blades separated by an intermediate plate. The air inlet includes an upper opening in the casing for air delivery to the upper blades and a lower opening for air delivery to the lower blades with the air expelled by the fan into a fan chamber directing it to a generally enlarged duct to substantially increase the capacity of the fan and the volume of air delivered to the hair.
Inventors
- 👤 Cleerey E Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:58
CPC Classifications
A; A45; A45D; A45D20/00; A45D20/44
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
196 words
A hair dryer comprising: a. a base having an upper wall and a bottom wall with an intermediate wall inbetween to define upper and lower compartments, the walls having openings in vertical alignment, the openings in the upper and lower walls defining upper and lower air inlets respectively, b. fan motor means mountEd in the intermediate wall and having a vertical shaft mounting a centrifugal fan generally concentric with the openings and disposed in the lower compartment, the fan comprising a disc having generally radial upwardly and downwardly extending fins, c. a hood defining an air chamber contoured to receive a head of hair to be dried and means for supporting said hood above said base, d. conduit means connecting said lower compartment and said air chamber and permitting flow from said lower compartment to said air chamber, electric heating means disposed in said conduit means, whereby the volume of air passing over the heating element withdraws sufficient heat to dry the hair quickly and with no discomfort, and whereby should one of the air inlets become blocked, air passing from the other inlet and over the heating element will preclude overheating of the heating element.
Claim 2
Dependent Claim
196 words
A hair dryer comprising: a. a base having an upper wall and a bottom wall with an intermediate wall inbetween to define upper and lower compartments, the walls having openings in vertical alignment, the openings in the upper and lower walls defining upper and lower air inlets respectively, b. fan motor means mountEd in the intermediate wall and having a vertical shaft mounting a centrifugal fan generally concentric with the openings and disposed in the lower compartment, the fan comprising a disc having generally radial upwardly and downwardly extending fins, c. a hood defining an air chamber contoured to receive a head of hair to be dried and means for supporting said hood above said base, d. conduit means connecting said lower compartment and said air chamber and permitting flow from said lower compartment to said air chamber, electric heating means disposed in said conduit means, whereby the volume of air passing over the heating element withdraws sufficient heat to dry the hair quickly and with no discomfort, and whereby should one of the air inlets become blocked, air passing from the other inlet and over the heating element will preclude overheating of the heating element.
Claim 3
Dependent Claim
31 words
A hair dryer as described in claim 1 further including means for supporting the bottom wall so that the lower inlet is spaced above a supporting surface for the hair dryer.
Claim 4
Dependent Claim
34 words
The hair dryer of claim 1 wherein the lower compartment is further defined by an upright wall extending between said lower wall and said intermediate plate, said upright wall defining an expanded scroll contour.
Claim 5
Dependent Claim
128 words
A hair dryer including a base generally housing a motor and centrifugal fan assembly and a heater element, a hood describing an air chamber contoured for receiving a head of hair to be dried, combination support means for generally supporting said hood above said base accessible to a user and duct means for delivery of air from said base to said hood wherein the improvement comprises: air inlet means in said base for delivery of air to said fan, said inlet means including a first inlet for delivering air centrally to one side of said fan and a second inlet for delivering air centrally to the other side of said fan; and a fan chamber common to both sides of said fan and including an air outlet opening.
Claim 6
Dependent Claim
128 words
A hair dryer including a base generally housing a motor and centrifugal fan assembly and a heater element, a hood describing an air chamber contoured for receiving a head of hair to be dried, combination support means for generally supporting said hood above said base accessible to a user and duct means for delivery of air from said base to said hood wherein the improvement comprises: air inlet means in said base for delivery of air to said fan, said inlet means including a first inlet for delivering air centrally to one side of said fan and a second inlet for delivering air centrally to the other side of said fan; and a fan chamber common to both sides of said fan and including an air outlet opening.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |