Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
1998-12-31
2001-02-06
Walberg, Teresa (Department: 3742)
Pumps
Motor driven
Electric or magnetic motor
C439S153000, C439S351000
Reexamination Certificate
active
06183222
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention concerns an electric fan assembly for vehicle air conditioning systems, of the type defined in the preamble to the main claim.
These electric fan assemblies are conventionally constituted by an actual electric fan comprising an electric motor and a fan impeller fitted to the rotating shaft of the aforesaid motor, and a casing therefor which is usually made from plastics material.
The casing is intended to contain and protect the various parts of the electric motor and fan; the part of the casing which surrounds the impeller, commonly known as a collector scroll cowling, is formed so as to convey the air stream produced towards distribution ducts.
In the known arrangements, the electric motor is connected to an electric power supply by means of a connector comprising a first section formed integrally with the casing and a second section connected to an electrical supply cable and cooperating with the first section in a coupling configuration.
While assembling the electric motor on the assembly, it is necessary to connect the motor electrically to the first section of the connector.
The main problem of the arrangements known until now is that this connection is complex due to the necessity of operating in a poorly-accessible place, and is subject to polarity inversion errors.
A further disadvantage of this arrangement is that, once mounted, the connecting wires between the brushes and the connector are too long and can prevent the apparatus operating correctly.
SUMMARY OF THE INVENTION
The object of the invention is to avoid these disadvantages by simplifying the operations for mounting the electric motor in the casing, at the same time reducing costs and time, and to improve the reliability of the entire electric fan assembly.
According to the invention, these objects are achieved by an electric fan assembly for vehicle air conditioning system. The arrangement according to the invention consists in forming the entire connector separately from the casing, in particular by connecting the wire terminals of the brushes of the electric motor to the first section of the connector body without using long connecting wires, and providing this latter with means for the direct snap-engagement on to the brush-holder assembly of the electric motor itself.
This pre-assembled unit can thus easily be inserted into a housing provided in the casing until the first connector section faces its own seat formed integrally with the casing itself. The engagement of a second connector section through the seat also prevents the axial sliding of the electric fan with respect to the casing.
REFERENCES:
patent: 4160576 (1979-07-01), Vettori
Izzo Antonio
Marchesani Cesario
Campbell Thor
Magneti Marelli Climatizzazione S.p.A.
Sughrue Mion Zinn Macpeak & Seas, PLLC
Walberg Teresa
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