Height adjustable apparatus with control arm
US8321976B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2008 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Oct 5, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G7/012
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention has a deck supported by at least one parallelogram. When two parallelograms are used, the first has first and second levers and a drag link, and the second has third and fourth levers and a second drag link. Each parallelogram is raised and collapsed with an actuator. The first lever and the fourth lever each have an arm with an interface. The actuators are pivotally and movably connected to the interfaces and pivotally connected to the drag links. The location of the actuators relative the interfaces is controlled with control arms. The control arms have ends that are connected to the respective drag link and each rotates at an offset circular path about a central point of the adjacent levers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.