Sprocket construction for a zero caternary chain
US4487088A · kind A · utility
11Cited by
10References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1982 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Mar 29, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19972
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A sprocket construction for a zero caternary chain. In a zero caternary chain, a tensioning system is utilized to prevent caternary or slack in the chain and as a result of the high degree of tensioning, the bushings of the chain ride against the roots of the sprocket teeth. To prevent erosion of the sprocket teeth and bushings, the root diameter is modified to provide an enlarged operating pitch diameter for a predetermined increase in pitch length of the link. The pitch line clearance is enlarged so that it is equal to 2% to 25% of the working pitch diameter and produces a pressure angle of 20.degree. to 40.degree..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.