Drying and gas or vapor contact with solids – Apparatus – For hair on head
Patent
1996-07-25
1998-02-24
Bennett, Henry A.
Drying and gas or vapor contact with solids
Apparatus
For hair on head
A45D 0000
Patent
active
057201072
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to an air-moving pulsator for an electric hair dryer which, for the purpose of creating a pulsing action in the air stream, includes a rotor rotatably supported in a substantially tubular housing portion and having an impeller adapted to be impacted by the air stream exiting from the hair dryer.
BACKGROUND
A pulsator of this type is known from DE 32 25 944 A1. (which corresponds to Canadian Application 1 183 345) This pulsator includes a rotor mounted coaxially with the air outlet of the hair dryer housing and including a plurality of parallel vanes as well as one vane arranged at right angles to these vanes. In this arrangement, the parallel vanes are of approximately like inclination, whereas the vane disposed perpendicular thereto is inclined in opposite directions on opposite sides of the axis of rotation. When the air stream exiting from the hair dryer impinges upon one of the inclined surfaces of the perpendicularly arranged vane, rotation is imparted to the rotor, with the parallel vanes then creating a swirl in the exiting air stream. This air stream is intended to create a pulsing separating and lifting action of the hair to be dried. It is a disadvantage in this arrangement that the respective opposed inclinations of the rectangularly disposed vane involve a complex rotor manufacture, necessitating an intricately shaped injection mold, because these parts are formed by high volume injection molding techniques. Equally, these inclined surfaces of the perpendicularly disposed vane add to the weight of the rotor, thus making more difficult the drive of the rotor in particular in a low-dimensioned hair dryer as regards the volumetric rate of air flow. In addition, in this pulsator configuration the pulsation frequency is not selectively adjustable, that is, variable, which is a serious disadvantage for the user.
SUMMARY OF INVENTION
It is therefore an object of the present invention to improve upon a known pulsator to the effect that the rotor affords ease of construction in a straightforward way and that the air stream exiting from the pulsator is variable.
This object is accomplished in that there is arranged upstream of the rotor, as seen when looking in the discharge direction of the air stream, a stator provided with movable vanes for varying the pulsation frequency and adapted to impart rotation to the air stream abut its axis. The stator acts to orientate the air in a rotating path, whereby air effectively strikes the impeller driving the rotor, thereby creating the desired pulsing action. The movable vanes for varying the pulsation frequency enable the user to adjust the pulsation frequency to different intensities as required, with the attendant advantage of enabling the hair to be lifted and/or fluffed to a greater or lesser degree, depending on the thickness of the hair or the degree of drying. In a particular setting, the pulsation of the air stream is canceled entirely, thus enabling the hair dryer to be used in the conventional manner, without requiring the pulsator to be detached from the hair dryer. The rotor itself needs no additional special parts to generate the rotary motion, that is, the swirl in the air stream. Thus, a pulsator of this type is essentially suitable for use on any hair dryer, including hair dryers having a low volumetric rate of air flow, for producing a pulsing air stream and, moreover, it can be manufactured with relative ease.
Advantageously, the stator includes air-directing blades whose angular position relative to a longitudinal axis of the pulsator is variable. By varying the angular position of the air-directing blades relative to the pulsator axis, the intensity of the swirl imparted to the air stream is likewise varied, that is, the air stream is caused to rotate about its own axis at variable velocities, thus causing the rotor to rotate at equally variable velocities.
An adjustment possibility for the air-directing blades affording ease of construction is provided by arranging for each of the air
REFERENCES:
patent: 4019260 (1977-04-01), Levy et al.
patent: 4132360 (1979-01-01), Lee, Jr.
patent: 4295283 (1981-10-01), Tomaro
patent: 5392528 (1995-02-01), McDougall
Herzog Karl
Rolf Wilfried
Bennett Henry A.
Braun Aktiengesellschaft
Doster Dinnatia
Podszus Edward S.
LandOfFree
Adjustable pulsator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable pulsator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable pulsator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1868424