Prestressed brake drum or rotor
US5664648A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1994 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Oct 4, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D65/127
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Uniformly distributed compressive stresses are induced in the machined surfaces of brake drums and brake rotors. The compressive stresses cancel residual tensile stresses induced in the surfaces by machining operations during fabrication. Cancellation of the surface tensile stresses delays formation of cracks during service brake use and extends the service life of the brake drum or rotor. Shot peening is an applicable prestressing process which also imparts a surface roughness that reduces the time required to burnish brake pads to match the shape of the drum or rotor surface. The reduction of burnishing time reduces the amount of surface cracking caused by surface heating by brake pad high spots as the high spots are ground down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.