192 clutches and power-stop control – Clutches – Operators
Patent
1996-03-28
1997-11-18
Pitts, Andrea L.
192 clutches and power-stop control
Clutches
Operators
310 68C, 310 92, F16D 2704
Patent
active
056878230
ABSTRACT:
An electromagnetic clutch for a compressor in an air conditioning apparatus for an automobile. A temperature fuse unit 13 is arranged in an electric circuit for an electromagnetic coil of the clutch for opening the circuit when a temperature increase is generated due to an occurrence of seizing. The temperature fuse unit 13 is arranged in a coil housing 4 at a location adjacent a frictional surface 2a of a rotor of the clutch and an inner sleeve portion 4a of the coil housing 4. During normal operation of the clutch, heat around the electromagnetic coil is transmitted to the coil housing of an increased heat conductivity, made of a magnetizing metal materials, thereby preventing the temperature around the temperature fuse 13 from being increased. At an occurrence of seizing of the compressor, heat generated by a sliding contact between an armature 8 and rotor 2 is quickly transmitted to the temperature fuse 13 via an end of the inner sleeve portion 4b of the coil housing 4, which allows the temperature fuse to be instantly melted and thus opened.
REFERENCES:
patent: 4045761 (1977-08-01), Peterson
patent: 4771198 (1988-09-01), Aschberger et al.
Ito Yutaka
Kinoshita Masahiro
Nakagawa Juneichi
Shingai Hidetaka
Suzuma Kimio
Nippondenso Co. Ltd.
Pitts Andrea L.
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