Height control mechanism
US4621868A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1985 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Sep 6, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S297/03
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A control mechanism for a hydraulic lifting assembly for supporting articles of furniture. The hydraulic lifting assembly includes a base, a support column secured to the base, a variable volume chamber, a fixed volume chamber and a control valve mechanism. The fixed and variable volume chambers are interconnected by a flexible conduit. The control valve mechanism includes a cam secured to a rotatable rod which is positioned so that, by rotating the rod, the cam will selectively pinch off the flexible conduit and prevent fluid flow therethrough. A spring is provided for normally urging the cam against the flexible conduit to pinch off the conduit. The control may be located in any convenient location due the flexibility of the conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.