Cam guide drive mechanism for power-assisted chairs
US5314238A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Sep 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S297/10
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A power-assisted chair is disclosed having a linear actuation drive mechanism. A cam member is linearly moveable upon rotation of a power screw for selectively actuating a lift and tilt mechanism for causing forward lifting and tilting movement of the chair when the motor is operated in a first direction. Rotation of the screw shaft in a second opposite direction acts to lower the chair to the normal seating position. Continued rotation in the second direction causes sequential operative extension of a leg rest assembly followed by angular reclining movement of the chair. This sequential operation of the leg rest assembly and the reclining linkage are independent and may be easily disabled to selectively eliminate either of the features. In addition, an adjustment mechanism is provided for permitting the extended position of the leg rest assembly to be easily and simply adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.