The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 1994
Filed:
Dec. 16, 1992
Gary Latorraca, San Diego, CA (US);
Puritan-Bennett Corporation, Carlsbad, CA (US);
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.