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:
Apr. 20, 2004
Filed:
May. 06, 2002
Applicant:
Inventors:
Richard E. Schnell, Oswego, IL (US);
Hubert Schaber, Rutesheim, DE;
Assignee:
Ross Operating Valve Company, Troy, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 2/000 ;
U.S. Cl.
CPC ...
F15B 2/000 ;
Abstract
A control valve system in which main valves are actuated and deactuated by operation of pilot valves. Actuation of pilot valves causes actuation of the main valves, which enables fluid pressure to be output from the control valve system. The main valves must shift within a predetermined time period in order to prevent an error condition. A timing chamber stores a predetermined amount of fluid to define a time period in which the main valves must shift.