System and method for operating a respirator compressor system under low voltage conditions
US5368019A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1992 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Dec 16, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2205/063
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The system and method for operating an AC respirator compressor system at substantially subnormal line voltages includes a compressor, an accumulator, a solenoid unload or dump valve used to reduce the pressure at the outlet of the compressor, a check valve located downstream from the solenoid, a relief valve, a pressure sensor, and an AC voltage sensor. In a preferred embodiment, the compressor constantly supplies compressed air to the ventilator system, monitoring the accumulator pressure and activating the solenoid unload valve as required to maintain an acceptable range of pressure in the accumulator. In another preferred embodiment the compressor system can also be operated in an intermittent, or standby mode, to supply compressed air as needed. The respirator compressor system can maintain an acceptable range of pressure in the accumulator even during periods of low AC line voltage by monitoring both the accumulator pressure and the AC line supplying voltage to the respirator compressor system, and modulating the action of the solenoid unload valve to achieve low AC voltage operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.