Acoustics – Sound-modifying means – Housing or enclosure
Reexamination Certificate
2000-12-01
2001-12-18
Dang, Khanh (Department: 2837)
Acoustics
Sound-modifying means
Housing or enclosure
C181S202000
Reexamination Certificate
active
06330930
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a container for the noise-muffling accommodation of a unit to be installed in a vehicle, such as an electric motor, pneumatic pump or the like, which includes two container parts. Each part is formed by foam parts and fitted together to form a closed housing. The parts can be clipped to the vehicle bodywork for assembly on neighbouring parts of the vehicle.
Units to be installed in vehicles, such as pneumatically operating pumps, electric motors, hydraulic units and the like, which generate relatively loud operational noises during operation, are to be vibrationally decoupled from the carriers that accommodate them, for example bodywork parts of a motor vehicle, in order at least substantially to eliminate the transmission of body noise and significantly minimize airborne noise.
For this purpose, it is known to embed such units in a container made from foamed plastic of at least two parts. The container is secured in the vehicle by being permanently clamped, latched or snap-fitted to or clipped into adjacent vehicle parts (DE 44 22 384 A1).
SUMMARY OF THE INVENTION
The object of the present invention is to provide a container that can be securely closed and secured in the vehicle without the need for separate closure and securing members.
This object is achieved, according to the invention, by a U-shaped holder which is partially integrated into one container part foamed in place. The legs of the U of the holder each have a clipping member on mutually opposite wall parts of the container part to support it. The legs extend beyond the aperture edge of the latter to clip together the two container parts. A flange projects outwards from these wall parts to secure the container in a gap in the bodywork. At least one supporting shoulder projects laterally outward from the container part flange on its side remote from the respective clipping member. The supporting shoulder is moulded on to a spring tongue cut out of the leg of the U. The supporting shoulder, when the container is installed, is supported on a marginal part of the bodywork gap located between the flange and the supporting shoulder.
The provision of the holder arranged on one container part and its simultaneous equipment with the legs of a U serving to clip the two container parts together enables the simplest possible container handling, both for opening and closing the container and for its installation and removal, the only means necessary for these purposes being the provision of a U-shaped holder integrated into one container part.
Accordingly, the design according to the invention makes it possible also to manage with a small number of individual parts and part numbers. An important advantage in terms of weight can be achieved here if the container is formed by a rigid plastic component which is preferably injection-moulded from fibre glass reinforced nylon (nylon 6).
In order to be able to dispense, when inserting the container in the gap in the bodywork, with the need to press the spring tongues manually inwards to clip the container on the bodywork, it is advantageous to form the supporting shoulders of the legs of the U with a wedge-shaped taper in the direction opposite to the adjacent flange.
Designing the supporting shoulders in such a way that the supporting shoulders are each formed by numerous webs moulded onto the spring tongues of the legs of the U with lateral spacing, offers the advantage of economizing on plastic.
An effective, automatic securing of the container lid in its closed position can advantageously be achieved if the clipping members possess an engagement member at the free end extending at right angles towards the container part to be clipped. The engagement member engages over a supporting shoulder moulded into the adjacent wall part of this container part.
It is advantageous here if the engagement member forms one leg of an end piece of the clipping members which is of V-shaped cross-sectional design. The other leg of the clipping members projects over the wall part of the container, and if the supporting shoulder of the container part to be clipped forms a wall part of a recess of this container part, which is likewise approximately V-shaped in cross section, and into which the engagement member can be latched with positive locking.
In a further, advantageous embodiment of the invention, it is finally proposed to design the container parts in such a way that they form, in the clipped-together state, a cuboid container and that the holder of U-shaped cross section is provided on one container part in a manner such that the clipping members of the legs of its U in each case extend on one of its long wall parts beyond its aperture edge.
From the following detailed description, taken in conjunction with the drawings and subjoined claims, other objects and advantages of the present invention will become apparent to those skilled in the art.
REFERENCES:
patent: 3882951 (1975-05-01), Conley
patent: 4914929 (1990-04-01), Shimazaki
Polic Marko
Weikert Gunther
Daimler-Chrysler AG
Dang Khanh
Kenyon & Kenyon
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