US4700049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wall-mounted electric hair dryer incorporating dual-voltage electric shaver outlets
Assignee: RICHARD H RUBIN TRUST A TRUST OF SOUTH AFRICA
•
Filing: 1985-08-12
•
Granted: 1987-10-13
•
Expires: 2005-08-12
Abstract
Abstract A wall-mounted hair dryer has a casing which contains a heating element, a motor, an impeller and associated electrical circuitry. There is a flexible air hose terminating in a handle having an outlet for directing hot air onto the person of a user. The handle can be secured detachably magnetically against the casing, and a switch is provided to switch on the hair dryer when the handle is detached from the casing and to switch it off when the handle is replaced. A electronic timer circuit is also provided to switch off the hair dryer after a predetermined period of operation. Two shaver outlets are mounted on the casing and are connected to a dual-voltage current-limited transformer supplying one of the outlets with mains voltage (e.g., 110 volts) and the other outlet with twice the mains voltage (e.g., 220 volts), with the current to the outlets being limited to 0.1 ampere by a current limiting device.
Inventors
- 👤 Richard H. Rubin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:05
CPC Classifications
A; A45; A45D; A45D20/00; A45D20/04; A45D20/08; A45D20/16; A45D20/22; A45D20/30; A45D20/52
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
a wall mounted hair dryer comprising: a casing having a cold air intake and a heated air outlet; said casing containing an impeller powered by an electric motor and an electric heating element coupled to the electric mains and arranged to draw cold air through said intake and provide heated air at said outlet; a flexible air hose having one end communicating with said outlet and another end having a handle terminating in a discharge air outlet for directing heated air at the person of the user; two shaver outlets mounted on said casing and connected to a dual-voltage current-limited transformer coupled to said electric mains, said transformer supplying one of said shaver outlets with said mains voltage and the other of said outlets with twice said mains voltage, the current supplied to both of said outlets being limited to substantially the current drain of an electric shaver, whereby an electric outlet can be replaced by a hair dryer and two safety electric outlets for shavers, one outlet at the normal voltage and the other at twice the mains voltage.
Claim 2
Dependent Claim
180 words
a wall mounted hair dryer comprising: a casing having a cold air intake and a heated air outlet; said casing containing an impeller powered by an electric motor and an electric heating element coupled to the electric mains and arranged to draw cold air through said intake and provide heated air at said outlet; a flexible air hose having one end communicating with said outlet and another end having a handle terminating in a discharge air outlet for directing heated air at the person of the user; two shaver outlets mounted on said casing and connected to a dual-voltage current-limited transformer coupled to said electric mains, said transformer supplying one of said shaver outlets with said mains voltage and the other of said outlets with twice said mains voltage, the current supplied to both of said outlets being limited to substantially the current drain of an electric shaver, whereby an electric outlet can be replaced by a hair dryer and two safety electric outlets for shavers, one outlet at the normal voltage and the other at twice the mains voltage.
Claim 3
Dependent Claim
19 words
The hair dryer of claim 1 wherein said transformer is coupled to said electric mains by a current-limiting device.
Claim 4
Dependent Claim
13 words
The hair dryer of claim 2 wherein said transformer is a center-tapped transformer.
Claim 5
Dependent Claim
21 words
The hair dryer of claim 2 wherein said current is limited to a substantially 0.1 ampere by said current limiting device.
Claim 6
Dependent Claim
108 words
The hair dryer of claim 1 further comprising: holding means for detachably securing said handle against said casing during periods of non-use; switching means operably associated with electrical circuitry located in said casing and coupled between said mains and said electric motor and heating element, said circuitry including means for switching on said hair dryer in response to detachment of said handle from said casing and means for switching off said hair dryer in response to replacement of said handle in said holding means; and a timer located in said casing and coupled to said circuitry to switch off said hair dryer after a predetermined period of operation.
Claim 7
Dependent Claim
31 words
The hair dryer of claim 5 wherein said mains supply AC current and said motor is a low voltage DC motor connected in series with said heating element and a rectifier.
Claim 8
Dependent Claim
19 words
The hair dryer of claim 6 wherein said transformer is coupled to said eletric mains by a current-limiting device.
Claim 9
Dependent Claim
13 words
The hair dryer of claim 7 wherein said transformer is a center-tapper transformer.
Claim 10
Dependent Claim
19 words
The hair dryer of claim 8 wherein said current is limited to substantially 0.1 ampere by said current-limiting device.
References Cited (Backward Citations)
US1452085A
Cited
FR794827A
Cited
GB487425A
Cited
US2646496A
Cited
US2698894A
Cited
US3076887A
Cited
US3384977A
Cited
US3449838A
Cited
FR2297387A1
Cited
US4195416A
Cited
FR2395677A7
Cited
US4276631A
Cited
FR2478973A1
Cited
US4366366A
Cited
EP0049825A2
Cited
WO1984001276A1
Cited
EP0126777A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |