Clutch plate, friction clutch, and coupling device
US6920968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2002 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Nov 8, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2300/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A friction clutch has a plurality of iron inner clutch plates and a plurality of iron outer clutch plates. Both the clutch plates have sliding surfaces which are friction-engaged each other. A thin carbon film in a diamond form, which functions as a solid lubricant, is formed on each of the sliding surfaces of the outer clutch plates by a known method such as the Chemical Vapor Deposition method. A known nitride treatment or quenching and tempering treatment is applied to the sliding surfaces of the inner clutch plates. A coupling device has a pilot clutch mechanism with the friction clutch and an electromagnetic actuator. As a result, the friction clutch is resistant to wear and the coupling device is excellent in durability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.