Height adjustable apparatus
US7849538B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 2007 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Jan 14, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61G7/012
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention has a deck and a mid-frame, connected by first and second levers. An arm of the first lever has an interface. These levers are connected with a drag link. An actuator is pivotally and movably connected to the interface and pivotally connected to the drag link. The location of the actuator relative the interface is controlled with a control arm. The deck, mid-frame and first set of levers comprise a first parallelogram. Third and fourth levers are connected to the mid-frame. The fourth lever has an arm with an interface. These levers are connected with a drag link. An actuator can be pivotally and movably connected to the interface and pivotally connected to the drag link. The location of the actuator relative the interface is controlled with a control arm. The bases, mid-frame and second set of levers comprise a second parallelogram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.