Undermattress laths having spring type connections
US5058224A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1989 |
| Grant date | Oct 22, 1991 |
| Priority date | — |
| Expiry date | Aug 11, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C23/066
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An undermattress which includes a frame which is spanned in a transverse direction by a plurality of laths which are supported on the frame at each end, so as to be yieldable in a direction of loading of the undermattress, by structure that holds a plurality of laths via joints (3,4,7) which are each formed from a joint pin (3) having a spherical or ellipsoidal joint head (4) and a guide bush (7). Each joint head (4) is fitted into a respective guide bush (7) and is shaped for enabling movement of the joint pin (3) relative to the guide bush (3) in every direction. In this way, sufficient freedom of movement is provided to enable the laths to be held without tilting on the frame even under unilateral loading.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.