Stair chair with an adjustable glide track resistance and braking device
US7520347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2006 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | May 11, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62B2301/256
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A stair chair for transporting a person up and down a flight of stairs and over a surface is disclosed. The stair chair comprising a main frame and a glide track assembly to support the stair chair for movement on the flight of stairs. The glide track assembly is pivotally connected to the main frame for pivotal movement between open and closed positions. The glide track assembly has at least one endless glide track. The stair chair also provides an adjustable glide track resistance and braking device which engages the endless glide track and is configured to infinitely adjust the amount of resistance applied to the endless glide track between 0 to 100% resistance and to set a desired rolling resistance applied to the endless glide track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.