Tuning machine with reduced backlash and end play
US4974481A · kind A · utility
Inventor
Key dates
| Filing date | Nov 22, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Nov 22, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10D3/14
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tuning machine is provided with an adjustable bearing surface for eliminating mesh backlash and end play which gradually develope between the worm and worm gear over years of service. The worm is held against the worm gear by a pair of saddle bearings formed on a sliding retainer. When the bearing wear develops an unacceptable backlash or end play develops, the retainer is loosened and repositioned closer to the worm. In the new position the worm is returned to its original intimate engagement with the worm gear. Simultaneously, the worm, is axially centered due to opposed bevel surfaces on the worm and saddle bearings. The new worm to worm gear mesh is free of backlash and endplay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.