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US4308670A Expired / Lapsed US ⏱️ 0.0 years remaining

Axial fan hair dryer

Assignee: Gillette Co LLC
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Filing: 1980-09-15
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Granted: 1982-01-05
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Expires: 2000-09-15
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Abstract

Abstract A hand-held portable axial fan hair dryer having an air inlet and an air outlet is provided with a shield and collar assembly proximate the air inlet to substantially prevent hair knotting and tangling. Hair styling attachments, such as a comb or brush, may be removably attached proximate the air outlet.

Inventors

  • 👤 James V. Bonnema

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 07:43
CPC Classifications
A; A45; A45D; A45D20/00; A45D20/04; A45D20/08; A45D20/10; A45D20/12; A45D20/48; A45D20/50

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 191 words
A portable hair dryer comprising a handle portion and an air flow portion, said air flow portion defining an air inlet and an air outlet, said air flow portion including a motor driven axial fan assembly wherein said axial fan is driven by said motor through a connecting motor shaft which passes through said axial fan, and stationary substantially air-impervious shield means for blocking the line of sight path to the portion of said motor shaft between said axial fan and said air inlet, said shield means being disposed about and substantially enveloping the portion of said motor shaft beyond said axial fan, an inlet structure mounted in said air inlet, said shield means including a mounting post around which loose hair, which gets through said air inlet structure, tends to collect, wherein said shield means is connected to said inlet structure at said mounting post, and collar means disposed between said axial fan assembly and said motor and affixed to said fan assembly for movement therewith wherein said collar means blocks the line of sight path to the portion of said motor shaft between said axial fan and said motor.
Claim 2
Dependent Claim 191 words
A portable hair dryer comprising a handle portion and an air flow portion, said air flow portion defining an air inlet and an air outlet, said air flow portion including a motor driven axial fan assembly wherein said axial fan is driven by said motor through a connecting motor shaft which passes through said axial fan, and stationary substantially air-impervious shield means for blocking the line of sight path to the portion of said motor shaft between said axial fan and said air inlet, said shield means being disposed about and substantially enveloping the portion of said motor shaft beyond said axial fan, an inlet structure mounted in said air inlet, said shield means including a mounting post around which loose hair, which gets through said air inlet structure, tends to collect, wherein said shield means is connected to said inlet structure at said mounting post, and collar means disposed between said axial fan assembly and said motor and affixed to said fan assembly for movement therewith wherein said collar means blocks the line of sight path to the portion of said motor shaft between said axial fan and said motor.
Claim 3
Dependent Claim 19 words
The hair dryer as in claim 1 wherein said air outlet includes means for releasably receiving associated styling attachments.
Claim 4
Dependent Claim 25 words
The hair dryer as in claim 2 wherein said air inlet is of generally circular shape and said air outlet is of generally rectangular shape.
Claim 5
Dependent Claim 29 words
The hair dryer as in claim 1 wherein said inlet structure is cross shaped and further including a screen member disposed over the upstream side of said inlet structure.
Claim 6
Dependent Claim 28 words
The hair dryer as in claim 1 wherein said collar means includes side walls extending beyond the bottom portion of the downstream side of said axial fan assembly.
Claim 7
Dependent Claim 277 words
A portable hair dryer comprising a dryer housing having a handle portion and an air flow portion, said air flow portion defining an air inlet of generally circular shape and defining a single air outlet of generally rectangular shape adapted to releasably receive a mating attachment, said air flow portion including an axial fan means, including a fan mounted on a motor through a motor shaft which passes through said fan, said fan being axially disposed within said air flow portion for drawing a stream of air into said air inlet, through said air flow portion and out said air outlet, said axial fan means being aligned with said air outlet to cause the stream of air to pass directly from said axial fan means through said air outlet without change of direction, and means for substantially preventing hair entanglement from said air inlet including stationary substantially air-impervious, dome shaped shield means for blocking the line of sight path to the portion of said motor shaft between said axial fan and said air inlet, said shield means being disposed about and substantially enveloping the portion of said motor shaft beyond said fan, an inlet structure mounted in said air inlet, said shield means including a mounting post around which loose hair, which gets through said inlet structure, tends to collect, wherein said shield means is connected to said inlet structure at said mounting post, and collar means disposed between said axial fan and said motor and affixed to said fan for movement therewith wherein said collar means blocks the line of sight path to the portion of said motor shaft between said axial fan and said motor.
Claim 8
Dependent Claim 277 words
A portable hair dryer comprising a dryer housing having a handle portion and an air flow portion, said air flow portion defining an air inlet of generally circular shape and defining a single air outlet of generally rectangular shape adapted to releasably receive a mating attachment, said air flow portion including an axial fan means, including a fan mounted on a motor through a motor shaft which passes through said fan, said fan being axially disposed within said air flow portion for drawing a stream of air into said air inlet, through said air flow portion and out said air outlet, said axial fan means being aligned with said air outlet to cause the stream of air to pass directly from said axial fan means through said air outlet without change of direction, and means for substantially preventing hair entanglement from said air inlet including stationary substantially air-impervious, dome shaped shield means for blocking the line of sight path to the portion of said motor shaft between said axial fan and said air inlet, said shield means being disposed about and substantially enveloping the portion of said motor shaft beyond said fan, an inlet structure mounted in said air inlet, said shield means including a mounting post around which loose hair, which gets through said inlet structure, tends to collect, wherein said shield means is connected to said inlet structure at said mounting post, and collar means disposed between said axial fan and said motor and affixed to said fan for movement therewith wherein said collar means blocks the line of sight path to the portion of said motor shaft between said axial fan and said motor.
Claim 9
Dependent Claim 27 words
The hair dryer as in claim 6 wherein said collar means includes side walls extending beyond the bottom portion of the downstream side of said axial fan.

References Cited (Backward Citations)

GB1057574A Cited
US3261107A Cited
GB1218060A Cited
US3800810A Cited
GB1414891A Cited
US3857016A Cited
US3840030A Cited
NL7600647A Cited
SU615252A1 Cited
US4195217A Cited
GB1546318A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-01-04 1985-07-06 1986-01-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-01-04 1989-07-06 1990-01-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-01-04 1993-07-06 1994-01-05 $7700.00 Window Closed / Lapsed

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