Saw chain with wear link
US4873903A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 1988 |
| Grant date | Oct 17, 1989 |
| Priority date | — |
| Expiry date | Jul 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/925
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Saw chain is assembled with wear links for improving the resistance of saw chain to abrasion from the saw bar. In one embodiment, the wear links are mounted one beside each steel side link in the chain and are constructed to ride along the outer surfaces of the pair of parallel rails upon which the side links also ride as the chain is driven around the bar. The wear links, however, are formed of a material that better resists abrasion than steel but consequently has less tensile strength. To assure that the tensile load on the chain is assumed by the steel side links while the chain is supported on the bar by the wear links, the wear links have oblong pin openings of the same height but of greater length than the circular openings of the side links. In a second embodiment, the wear links are mounted on both sides of each drive link rather than beside each side link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.