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:
Oct. 17, 1995
Filed:
Apr. 28, 1994
Robert J Herbst, Avon, OH (US);
Duane R Johnson, Wellington, OH (US);
AlliedSignal Truck Brake Systems Company, Elyria, OH (US);
Abstract
A compressed air system includes an air dryer which dries compressed air before the compressed air is communicated to a reservoir. The air dryer includes a desiccant which is purged by using air stored in the reservoir. A pressure reference purge control valve is installed between the air dryer and the reservoir and includes a housing which defines a pressure reference volume. A pressure which is a function of the highest pressure level communicated to the reservoir is trapped in the reference volume. The valve permits purging only until a pressure is reached which is a predetermined pressure drop below the reference pressure level, whereupon purging is terminated.