Electromagnetic clutch
US5687823A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2027/001
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.