Oil-free chain
US7775925B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Jan 10, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16G13/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An oil-free chain has bushings which protrude from the outer surfaces of the inner link plates into which they are press-fit, and extend into bushing supporting bores formed in the inner surfaces of the outer link plates of the chain. These bushing supporting bores are formed by a pressing operation which produces offsets in portions of the outer plate, so that, as the bushing supporting bores are formed in the inner surfaces of the outer plates, bosses are simultaneously formed on the outer surfaces. The connecting pins of the chain are press-fit into pin holes in these bosses. The bushing supporting bores are formed without removal of material by machining, and therefore the strength of the outer plates is not compromised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.