Adjustable bed having adjustable height legs with synchronization feature
US5134731A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1991 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Feb 7, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19735
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An adjustable bed comprises a head end, a foot end, and a planar mattress portion extending therebetween. The head end and foot end feature a drive screw and nut housing assembly. Each head end and foot end features tubes which are slidingly received within the head end and foot end. The tubes are attached via a cable to the nut housing. Upon rotation of the drive screw, the nut housing rises or descends, thereby adjusting the height of the bed. The translational movement of the nut housing along the drive screw is limited by a drive screw pin at the upper and lower extremities of each drive screw. The drive screw pin selectively engages a similar slip nut pin located on a slip nut which is received within the nut housing. Frictional force between the slip nut and the nut housing is maintained by a pair of pressure plates which are compressively received within the nut housing. The compressive force between the slip nut and the nut housing is adjusted by means of a pair of set screws and springs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.