Variable function devices
US6513784B2 · kind B2 · utility
12Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2001 |
| Grant date | Feb 4, 2003 |
| Priority date | — |
| Expiry date | Dec 18, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16M11/2014
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system for performing a variable function such as a variable spring resistance comprises a plurality of selectively operable spring devices and movable actuator means for selecting/deselecting devices over a range of movement of the actuator means. The actuator means includes stepped drives for selecting/deselecting at least one of the spring devices at a predetermined ratio with respect to another of the devices whereby spring devices can be selected to operate individually or in combination by movement of the actuator means to provide multiple levels of spring resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.