Ventilation – Vehicle – Seat structure
Reexamination Certificate
1999-09-28
2001-08-21
Joyce, Harold (Department: 3749)
Ventilation
Vehicle
Seat structure
C297S180140, C297S452470
Reexamination Certificate
active
06277023
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention pertains to a motor vehicle seat with a ventilating device having an exhaust channel whose entrance is connected with a contact surface of the seat which is air permeable.
In the case of a motor vehicle seat of this well-known type (see, for example, WO 97/09 908), the entire current of air that is transported is drawn off directly from a contact surface through a covering that is equipped with openings and a mat that is permeable to air. The mat is protected from the area of the seat that surrounds it in a manner that is impervious to air. The current of air that flows through the covering and the air-permeable mat should encounter as little resistance as possible. A current of air that results from the effects of suction is frequently perceived as being not so unpleasant as one that is generated as the result of being blown upon; however, in the area that lies immediately opposite the fan, in particular, high rates of flow result, which are perceived as an unpleasant draft. By contrast, little air is drawn off from the areas that surround the intake opening. Across the contact surface, therefore, the result is a widely varied and unfavorable distribution of the current.
Taking this state of the art into account, it is an objective of the present invention to create a motor vehicle seat with a ventilating device that provides a comfortable seating environment, without the above-described drawbacks.
SUMMARY OF THE INVENTION
The present invention is a ventilating device for a motor vehicle seat wherein the ventilating device comprises an exhaust channel having an entrance connected with an air permeable contact surface and a porous air permeable mat adjacent the contact surface and an intake fan disposed in the exhaust channel and an intake channel terminating at the mat and having an intake opening and wherein a total air current drawn in by the intake fan and exiting the exhaust channel comprises a first air current drawn through the intake opening and a second air current drawn through the contact surface.
As a result of drawing in a partial air current that originates from the area surrounding the seat, which is conducted, in the longitudinal direction, through at least one constituent area of the mat, a negative pressure results beneath the contact surface of this relatively large area, which draws off a partial current of air from this area of the contact surface. For that reason, only very low rates of flow result on the contact surface, which are virtually imperceptible by the user of the seat. The constituent air current, which is drawn in from the surroundings, also brings the contact surface to a comfortable temperature. Any moisture that may be present can also be drawn off with the total current of air.
In one preferred embodiment of the invention, the intake channel, by means of which ambient air can be drawn in, is provided on a backrest, with a sufficient distance above the area of the loins so that no more than a comparatively small quantity of air is withdrawn from the sensitive area of the loins. The particularly sensitive neck area can be protected from drafts of air in the same manner by selecting the arrangement of the fan, by means of which the air is drawn in, accordingly.
REFERENCES:
patent: 2055843 (1936-09-01), Helfinstine
patent: 2430335 (1947-11-01), Hart
patent: 3506308 (1970-04-01), Fenton
patent: 4685727 (1987-08-01), Cremer et al.
patent: 5102189 (1992-04-01), Saito et al.
patent: 41 12 631 C1 (1992-04-01), None
patent: 197 37 636 A1 (1999-03-01), None
patent: 0 217 752 (1987-04-01), None
patent: 97/09908 (1997-03-01), None
Connolly Bove Lodge & Hutz
Faurecia Autositz GmbH & Co. KG
Joyce Harold
LandOfFree
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