Drive configuration for stair lifts
US6435308B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 12, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Mar 12, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B9/0815
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A drive configuration for stair lifts is described. The drive configuration has a load-bearing configuration which is mounted displaceably on a first (bottom) guide rail and a second (top) guide rail. A drive unit interacts with a drive rail. The drive rail is formed by a perforated bar which has engagement openings spaced apart at regular intervals in the longitudinal direction and also has two uninterrupted, mutually opposite running surfaces. The drive unit has two gearwheel-shaped drive wheels which are disposed opposite one another, and accommodate the perforated bar with a radial contact-pressure force between them. The drive wheels have drive surfaces which are uninterrupted in the circumferential direction and radially projecting drive protrusions, the drive protrusions interacting with the engagement openings in a form-fitting drive connection and the drive surfaces interacting with the running surfaces in a force-fitting drive connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.