High-efficiency, high-speed control unit for chain shifter
US5356349A · kind A · utility
11Cited by
13References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 8, 1993 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Oct 8, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H63/304
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control unit for a chain shifter uses a reversible electric selector motor to position a cam selector within a pawl guide housing so that a traveling pawl will be directed as necessary for chain shifting. The motor rotates a low mass eccentric, the eccentric providing sufficient angular force to actuate a spring-loaded latch key, the key positioning the cam selector. As the eccentric accelerates, it gains sufficient force until it impacts and moves one of a pair of latch arms holding the key in a central position, allowing the latch key to rotate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.