Bed apparatus
US6058533A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 17, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Sep 17, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G2203/726
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A bed includes a base, a frame supported on the base for relative movement about a horizontal pivot axis between raised and lowered positions, and a drive assembly for driving movement of the frame. The drive assembly includes a drive box supported on the base for pivotal movement about a horizontal axis parallel to the pivot axis of the frame, a motor supported in the drive box, a pair of laterally spaced sleeves supported in the drive box for rotation about horizontal axes that are perpendicular to the pivot axis of the frame, a pair of transmission elements connected between an output shaft of the motor and the sleeves for rotating the sleeves in unison with one another when the motor is operated, and a pair of screws supported in the sleeves for relative rotational movement. The screws each include a distal end that is secured to the frame for pivotal movement about an axis parallel to the pivot axis of the frame such that rotation of the sleeves in a first direction extends the screws, moving the frame toward the lowered, supine position, and rotation of the sleeves in the opposite direction retracts the screws, moving the frame toward the raised upright position. A wheel chai…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.