Staircase lift
US4756387A · kind A · utility
Inventor
Key dates
| Filing date | Jan 30, 1987 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Jan 30, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B9/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A staircase lift includes upper and lower support girders fixedly disposed along stairs, vertical rods disposed between the support girders, inclined support rods fixed on the vertical rods, a load receiver in the form of a platform or a seat with a back panel, the load receiver being movably supporting on the upper and lower support girders, a flat drive housing disposed on the back panel of the load receiver, and a motor-driven drive disposed in the drive housing, the drive including bolts having ends supported in endless grooves formed in the drive housing, a closed endless circle of guide sleeves supported on the bolts, a pair of gear wheels driving the bolts, and a plurality of support rollers equidistantly disposed in the circle of guide sleeves, extending from the drive housing and cooperating with the bolts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.