System for controlling the position of an inflatable bedrest positioned under a mattress
US6715172B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2002 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Dec 11, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C20/048
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
There is provided a bedrest including an inflatable bladder, a compressor assembly and a microprocessor based controller for inflating and deflating the bladder. The compressor assembly has several stages reducing the volume of air. The compressor assembly includes a housing having an air intake, a motor and a centrifugal blower for passing air into a valve assembly. When inflating, the air passes under pressure through the centrifugal blower, past the motor and through a check valve into the valve assembly and through air outlet that is connected to an air supply tube. In a preferred embodiment, the valve assembly is equipped with a solenoid relief valve for use when deflating the bladder. The microprocessor based controller enables an individual to inflate or deflate the bladder to any desired amount with a simple control. In addition, the hand controlled microprocessor permits computer programming so that the mattress can be automatically raised and lowered to different levels during different periods of time. An additional feature is that one does not need to simply continue to hold the switch down in order to raise or lower the bladder portion but instead can press a simple bu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.