U.S. patent number 3,650,041 [Application Number 04/839,932] was granted by the patent office on 1972-03-21 for hair dryer.
This patent grant is currently assigned to Rowenta-Werke Gesellschaft mit beschrankter Haftung. Invention is credited to Gotz Florian Strzelczyk.
United States Patent |
3,650,041 |
Strzelczyk |
March 21, 1972 |
HAIR DRYER
Abstract
A hair dryer of the hood type wherein the hood or bonnet is
collapsible into such a position after use so as to take up a
minimal of storage space. The bonnet is constructed of both stiff
and flexible parts arranged on either side of a thin substantially
rectangular casing. When the bonnet is used the parts fold
outwardly from either side of the case forming a full sized hair
dryer. When the bonnet is stored the parts are folded inwardly
forming a volume similar to a small attache case.
Inventors: |
Strzelczyk; Gotz Florian
(Muhlheim am Main, DT) |
Assignee: |
Rowenta-Werke Gesellschaft mit
beschrankter Haftung (Offenbach am Main, DT)
|
Family
ID: |
5704839 |
Appl.
No.: |
04/839,932 |
Filed: |
July 8, 1969 |
Foreign Application Priority Data
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Jul 11, 1968 [DT] |
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P 17 82 040.5 |
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Current U.S.
Class: |
34/99;
D28/16 |
Current CPC
Class: |
A45D
20/22 (20130101) |
Current International
Class: |
A45D
20/00 (20060101); A45D 20/22 (20060101);
A45d () |
Field of
Search: |
;34/96,97,98,99,100,101
;132/9 ;128/256 ;4/165 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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587,244 |
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Jan 1925 |
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FR |
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921,287 |
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Mar 1963 |
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GB |
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Primary Examiner: Matteson; Frederick L.
Assistant Examiner: Ramey; Harry B.
Claims
What is claimed is:
1. A hair dryer comprising in combination:
a generally U-shaped substantially rigid housing having air inlet
and air outlet openings and including air-blowing and heating means
for causing heated air flows to escape from said outlet openings;
and
a collapsible hood attached to said housing, said hood having two
halves disposed on opposite sides of the housing, each of said
halves comprising:
substantially rigid first stretching members having a width
substantially equal to the inner distance between the two branches
of the U-shaped housing and substantially rigid second stretching
members also having a width substantially equal to the inner
distance between the two branches of the housing, each of said
first stretching members being in the form of a plate hinged at one
edge to the base of said U-shaped housing and each of said second
stretching members being a bow member hinged at its ends to the
branches of said U-shaped housing for pivotal movement between a
first position in which the stretching members protrude laterally
from the housing and a second position in which the stretching
members are located substantially within the outline of the
housing, and flexible substantially air-impervious sheet material
secured to said housing and to said stretching members along the
lengths thereof,
said first position of the stretching members constituting the open
position of the hood and said second position the collapsed
position thereof.
2. The hair dryer according to claim 1 wherein each of said plates
is semicircularly shaped and hinged with its straight edge to the
base of the U-shaped frame.
3. The hair dryer according to claim 1 wherein said plates are made
of the same material as the frame.
Description
The invention relates to a hair dryer of the hood type for home use
which has the efficiency and other characteristics of a
professional hair dryer when in use and particularly to a bonnet
composed of stiff and flexible parts which allows the hair dryer to
be folded into a flat volume of minimal size for storage after
use.
BACKGROUND
There are known hair dryers of the general kind above referred to.
For instance, there are known hair dryers of the hood type having a
rigid bonnet made either of sheet metal or plastic. Other known
hair dryers of this general type have foldable or telescoping
bonnets in order to minimize storage space when not in use.
It has been found that notwithstanding the fact that the hair
dryers with foldable or telescoping bonnets need less storage space
when not in use as when being used, that these hair dryers still
require too much space for storage because the hair dryer when
collapsed is no smaller than its greatest diameter.
THE INVENTION
It is a broad object of the invention to provide a novel and
improved hair dryer of the general kind referred above to which has
enough efficiency when in use but which can be readily stored in
smallest space when not in use.
In accordance with the invention the hair dryer comprises a housing
having an air inlet and an air outlet duct, a communicating duct
connecting the inlet and outlet ducts, a fan driven by an electric
motor for drawing air through the inlet into the connecting duct,
an electric heating unit within the connecting duct heating the air
flowing through said connecting duct whereby said fan discharges
the heated air flowing through the outlet duct, a collapsible
hollow bonnet of a size to accommodate the head of a person when in
operative position, whereby said bonnet comprises both stiff and
flexible parts capable of being folded into a storage position
whereby said parts of said bonnet are placed within the outer
limitations of said housing, and mounting means for detachably
securing the bonnet to a standard in operative position.
According to a preferred embodiment of the invention the hair dryer
comprises a bonnet having at each half at least one reinforcing
member which could be folded out of the case at approximately
90.degree. .
In another specific embodiment of the invention the hair dryer has
a bonnet with platelike stiff parts forming an upper wall of the
bonnet when folded into its operative position.
A more specific object of the invention is to provide a novel and
improved hair dryer in which the plates of the bonnet are joined to
the housing pivotally and whereby preferably the plates are of the
same material as the housing. The plate and/or the hinges are
preferably made of plastic.
Another more specific object of the invention is to provide a novel
and improved bonnet for a hair dryer in which at the lower end of
the bonnet at either side of the housing at least one further
reinforcement member, for instance a curved piece, is pivotally
connected to the housing. The semicircular plates are omitted in
that case.
Another more specific object of the invention is to provide a hair
dryer in which the housing is the shape of a inverted "U"
overriding the bonnet, whereby the motor-fan unit of the
blower-type hair dryer is provided within the housing.
Still another more specific object of the invention is a hair dryer
which on one end of the housing is provided with a control member
for regulating the drying temperature and/or time. The scale of the
control member and/or the position of the control member itself may
be readable from below.
It is another object of the invention to have the heater unit
provided within the housing and that on the interior wall thereof
(next to the bonnet) air outlet ducts are provided.
According to another more specific object of the invention the
bonnet is provided with at least one air-discharge ring or bow.
Instead of providing specific air-discharge bows it is possible to
provide one or more reinforcement bows and/or semicircular plates
which are constructed as air-discharge members.
One further object of the invention is to provide a novel and
improved hair dryer having a double-walled bonnet.
In the accompanying drawings several preferred embodiments of the
invention are shown by way of illustration and not by way of
limitation.
In the drawings:
FIG. 1 is a perspective view of the hair dryer according to one
embodiment of the invention in operative position.
FIG. 1a shows part of the bonnet removed to illustrate the air
blowing and heating means of the dryer.
FIG. 2 is a view to a hair dryer according to FIG. 1 in a partially
folded position.
FIG. 3 is a perspective view of a hair dryer according to another
embodiment of the invention in operative position.
FIG. 4 is a view to a hair dryer according to FIG. 3 in storage
position.
Referring now to the figures more in detail FIG. 1 and 2 exemplify
a hair dryer of the hood type comprised of an inverted U-shaped
hollow housing preferably made of a suitable plastic.
In the operative position the main housing 1 is oriented as an
inverted "U." The bonnet or hood 5 is provided with two foldable
semicircular halves on either side of the housing 1.
Each half of the bonnet consists of a lower semicircular bow 9, a
foldable part 8, for instance, of a soft plastic and a semicircular
plate 6.
The plate 6 is hinged to the housing 1, for instance, by means of
an integral plastic hinge 7.
The bows 9 and the plates 6 can fold into the housing within the
direction of the arrows shown in FIG. 1. When parts 6 and 9 are
swung inwardly the soft material of part 8 folds in between.
When not in use the hair dryer according to the invention forms a
flat case requiring a minimal of storage space.
All parts essential for the use of the hair dryer are mounted
within the housing 1. The motor-fan-unit draws dry air through air
intake ducts 2.
The means for directing flows of hot air into the bonnet should be
visualized as conventional. As shown in FIG. 1a, they may comprise
a suction fan 14 having a fan blade 15 which sucks in cold air
through inlet 2. The sucked-in air is heated by suitable heating
means indicated by a grid 16 and directed into a duct 18 within the
housing. From this duct the air escapes through a plurality of
openings 17 into the bonnet.
Fixture 3 attaches the hair dryer to a mounting standard 13. When
using a telescopic standard this can be inserted into the housing
1.
The control member 4 for controlling or setting the temperature is
mounted on to the lower side of the housing 1 in a manner such that
it can be read from below.
An additional heating unit can be installed within the semicircular
plates, when additional performance is desired.
The air distribution system is not shown in details since there are
known many suitable embodiments. For instance all or part of the
inner three walls of the housing 1 can be provided with apertures
as slots which distribute the air within the bonnet relatively
uniformly in all directions. It is further possible to provide the
plates 6 with air outlets on their outer circumference. Plates 6
may be made either of one piece of plastic or of two pieces. A
further possibility is to make the bonnet double-walled and thus
using it for distribution and discharge of the air.
In the embodiment of FIGS. 3 and 4 is provided at least one further
reinforcing bow 12 between the housing 1 and the bow 10. Collapsing
of the bonnet is effected by swinging the bows 10 and 12 in the
direction of the arrow as shown in FIG. 3. The storage position of
the hair dryer is shown in FIG. 4.
The mounting of the motor-fan unit including the heater may be the
same as shown in FIGS. 1 and 2. The location of the temperature
and/or time control 4 is similar to FIGS. 1 and 2 in that the
setting and reading of this control can be made from below while
the hair dryer is in use.
The method of warm air distribution is in principle identical to
FIGS. 1 and 2.
The foregoing detailed description has been given for clearness of
understanding only, and no unnecessary limitations should be
understood therefrom as to modifications which may be obvious to
those skilled in the art.
* * * * *