Telescoping upright
US5553550A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1994 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Mar 30, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47B2200/0056
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
h An extruded aluminum upright support of a first, vertically elongated, extruded, integral, outer upright member and a second, vertically elongated, extruded, inner upright member telescopically arranged with each other, the outer member having a pair of spaced outer bearing channels, the inner member having a second pair of bearing channels; a first pair of bearings positioned in the first pair of bearing channels and extending laterally into the second pair of bearing channels; and a second pair of bearings positioned in the second pair of bearing channels and extending laterally into the first pair of bearing channels. The bearings are laterally expandable and contractible relative to bearing channels into which they extend. The bearings have two faces in the shape of a laterally oriented V at an obtuse angle to each other cooperable with wedge-shaped spacers each having a sloped face engaging one of the two faces, one of the spacers being axially fixed, and a threaded actuator engaging the other of the spacers whereby the threaded actuator can be employed to linearly move the spacers toward or away from each other to laterally expand or contract the bearings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.