Ratio control for toroidal-type traction drive incorporating lost motion cam actuator
US6656081B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2002 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Feb 27, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/6648
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A ratio control for a toroidal-type traction drive comprises toroidal discs defining a toroidal cavity. Traction roller assemblies have pivot trunnions rotatably supporting traction rollers. A ratio control element is provided, which is positionable to establish various ratios between the toroidal discs. A feedback structure is connected to the ratio control element and includes a ratio control valve to hydraulically control the traction roller assemblies, and a cam follower. A feedback cam is provided, which cooperates with the cam follower. A lost motion cam actuator is provided between a predetermined pivot trunnion and the feedback cam to permit limited independent deflected movement of the predetermined pivot trunnion from the pivot axis thereof without requiring corresponding movement of the feedback cam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.