US3674980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Divided flow hairdryer
Assignee: Ronson Corp
•
Filing: 1968-05-09
•
Granted: 1972-07-04
•
Expires: 1988-05-09
Abstract
Abstract A hairdrying device having an electrically driven fan mounted therein for blowing ambient air, two distinct internal air flow paths which terminate at a common output orifice, in one of which is mounted an electric resistance heating element, and an air flow regulator movably disposed common to both paths and located adjacent the common output orifice for mixing the hot and cold air streams in a ratio, according to the user''s desire, which is infinitely variable. The air flow regulator is in the form of a shutter which is larger than the output end of the air flow paths and has an open portion and a solid portion in which the open portion covers one of the paths and the solid portion covers the other in any desired ratio.
Inventors
- 👤 Ernest Francis Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:10
CPC Classifications
A; A45; A45D; A45D20/00; A45D20/18
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
207 words
A hairdryer which comprises: a a housing having an input orifice and an output orifice; b. driving means mounted within the housing; c. air moving means connected to the driving means and located adjacent the input orifice; d. walls mounted within the housing, surrounding the air moving means defining a first and a second path, the paths extending from adjacent the air moving means to adjacent the output orifice; e. a heating element mounted within one of the paths for heating air passing therethrough; f. a shutter, greater in size than the output orifice end of the paths, movably mounted within the housing in slidable engagement with the output orifice end of the paths and having an open portion and a solid portion; 1. the open portion covering one of the paths and the solid portion covering the other path at one extreme of shutter travel; and 2. the solid portion covering the path formerly covered by the open portion of the shutter at the other extreme of shutter travel; g. means for energizing the driving means and the heating element; and h. actuating means for selectively moving the shutter from one extreme of its travel to the other extreme or to any intermediate position of travel.
Claim 2
Dependent Claim
207 words
A hairdryer which comprises: a a housing having an input orifice and an output orifice; b. driving means mounted within the housing; c. air moving means connected to the driving means and located adjacent the input orifice; d. walls mounted within the housing, surrounding the air moving means defining a first and a second path, the paths extending from adjacent the air moving means to adjacent the output orifice; e. a heating element mounted within one of the paths for heating air passing therethrough; f. a shutter, greater in size than the output orifice end of the paths, movably mounted within the housing in slidable engagement with the output orifice end of the paths and having an open portion and a solid portion; 1. the open portion covering one of the paths and the solid portion covering the other path at one extreme of shutter travel; and 2. the solid portion covering the path formerly covered by the open portion of the shutter at the other extreme of shutter travel; g. means for energizing the driving means and the heating element; and h. actuating means for selectively moving the shutter from one extreme of its travel to the other extreme or to any intermediate position of travel.
Claim 3
Dependent Claim
59 words
the solid portion covering the path formerly covered by the open portion of the shutter at the other extreme of shutter travel; g. means for energizing the driving means and the heating element; and h. actuating means for selectively moving the shutter from one extreme of its travel to the other extreme or to any intermediate position of travel.
Claim 4
Dependent Claim
59 words
the solid portion covering the path formerly covered by the open portion of the shutter at the other extreme of shutter travel; g. means for energizing the driving means and the heating element; and h. actuating means for selectively moving the shutter from one extreme of its travel to the other extreme or to any intermediate position of travel.
Claim 5
Dependent Claim
25 words
A hairdryer according to claim 1 wherein: a. the shutter has a rack gear formed at one end thereof; and b. the actuating means comprises:
Claim 6
Dependent Claim
13 words
a pinion mounted on the shaft in meshing engagement with the rack gear.
Claim 7
Dependent Claim
13 words
a pinion mounted on the shaft in meshing engagement with the rack gear.
Claim 8
Dependent Claim
12 words
a pinion mounted on the shaft in meshing engagement with the rack.
Claim 9
Dependent Claim
12 words
a pinion mounted on the shaft in meshing engagement with the rack.
Claim 10
Dependent Claim
133 words
the tail portion thereof extending to adjacent the output orifice; b. a first side wall mounted within the housing substantially parallel to the tail portion of the deflector wall and extending from adjacent the beginning of the curved portion of the deflector wall to adjacent the output orifice; c. a second side wall mounted within the housing, substantially parallel to the tail portion of the deflector wall, between the first side wall and the deflector wall and extending from adjacent the opening of the curved portion of the deflector wall to adjacent the output orifice to define the first path and the second path, which paths receive the air flow centripitally forced by the air moving means around the interior of the deflector wall and through the opening in the curved portion thereof.
Claim 11
Dependent Claim
133 words
the tail portion thereof extending to adjacent the output orifice; b. a first side wall mounted within the housing substantially parallel to the tail portion of the deflector wall and extending from adjacent the beginning of the curved portion of the deflector wall to adjacent the output orifice; c. a second side wall mounted within the housing, substantially parallel to the tail portion of the deflector wall, between the first side wall and the deflector wall and extending from adjacent the opening of the curved portion of the deflector wall to adjacent the output orifice to define the first path and the second path, which paths receive the air flow centripitally forced by the air moving means around the interior of the deflector wall and through the opening in the curved portion thereof.
Claim 12
Dependent Claim
13 words
a pinion mounted on the shaft in meshing engagement with the rack gear.
Claim 13
Dependent Claim
13 words
a pinion mounted on the shaft in meshing engagement with the rack gear.
Claim 14
Dependent Claim
13 words
a pinion mounted on the shaft in meshing engagement with the rack gear.
Claim 15
Dependent Claim
13 words
a pinion mounted on the shaft in meshing engagement with the rack gear.
Claim 16
Dependent Claim
81 words
the leg section of the shutter having a rack gear formed thereupon; c. a control knob rotatably mounted on the housing having a shaft extending into the housing; and d. a pinion mounted on the shaft of the control knob in meshing engagement with the rack gear so that rotation of the control knob will cause the shutter to be slidably and selectively moved from one extreme of its travel to the other extreme or to any intermediate position of travel.
Claim 17
Dependent Claim
81 words
the leg section of the shutter having a rack gear formed thereupon; c. a control knob rotatably mounted on the housing having a shaft extending into the housing; and d. a pinion mounted on the shaft of the control knob in meshing engagement with the rack gear so that rotation of the control knob will cause the shutter to be slidably and selectively moved from one extreme of its travel to the other extreme or to any intermediate position of travel.
Claim 18
Dependent Claim
68 words
A hairdryer according to claim 1 wherein: a. the housing has an opening communicating with the path containing the heating element; and b. the shutter has an extension mounted thereupon which seals the opening when the open portion of the shutter covers the path containing the heater element and leaves the opening fully uncovered when the solid portion of the shutter covers the path containing the heating element.
Claim 19
Dependent Claim
25 words
A hairdryer according to claim 3 wherein: a. the sHutter has a rack gear formed at one end thereof; and b. the actuating means comprises:
Claim 20
Dependent Claim
27 words
A hairdryer according to claim 1 wherein the walls further comprise: a. a deflector wall formed in the shape of the numeral ''''9,'''' mounted in the housing;
Claim 21
Dependent Claim
25 words
A hairdryer according to claim 5 wherein: a. the shutter has a rack gear formed at one end thereof; and b. the actuating means comprises;
Claim 22
Dependent Claim
68 words
A hairdryer according to claim 5 wherein: a. the housing has an opening communicating with the path containing the heating element; and b. the shutter has an extension mounted thereupon which seals the opening when the open portion of the shutter covers the path containing the heater element and leaves the opening fully uncovered when the solid portion of the shutter covers the path containing the heating element.
Claim 23
Dependent Claim
25 words
A hairdryer according to claim 7 wherein: a. the shutter has a rack gear formed at one end thereof; and b. the actuating means comprises:
Claim 24
Dependent Claim
39 words
A hairdryer according to claim 1 which further comprises: a. a guide formed in the housing adjacent to the output orifice end of the paths; and in which b. the shutter is T-shaped and movably mounted in the guide;
Claim 25
Dependent Claim
68 words
A hairdryer according to claim 9 wherein: a. the housing has an opening communicating with the path containing the heating element; and b. the shutter has an extension mounted thereupon which seals the opening when the open portion of the shutter covers the path containing the heater element and leaves the opening fully uncovered when the solid portion of the shutter covers the path containing the heating element.
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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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |