Composite bearing material with polymer filled metal matrix interlayer of distinct metal particle sizes and method of making same
US4732818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Sep 29, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12063
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a composite bearing material comprising three layers: (1) a metal backing, (2) a porous metal interlayer bonded to the metal backing which includes bronze or other copper alloy particles from two distinct particle size ranges and (3) a PTFE based composition intermixed with and overlying the porous metal interlayer. In accordance with the method of the present invention, the porous metal interlayer substantially comprises a relatively non-homogeneous mixture of particles from the two distinct particle size ranges, wherein a substantial portion of the relatively fine powder is segregated adjacent the metal backing. The present invention includes a significant thickness of the PTFE based composition applied to and remaining above the surface of the porous metal backing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.