Title of Invention

HYDRAULIC DOUBLE VALVE

Abstract A control valve system (10) in which main valves (12,14) are actuated and deactuated by operation of pilot valves (24, 26). Actuation of pilot valves (24,26) causes actuation of the main valves (12,14) which enables fluid pressure to be output from the control valve system (10). The main valves (12,14) must shift within a predetermined time period in order to prevent an error condition. A timing chamber (38) stores a predetermined amount of fluid to define a time period in lwhich the main valves (12,14) must shift.
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Documents:

261-cal-2002-granted-abstract.pdf

261-cal-2002-granted-claims.pdf

261-cal-2002-granted-correspondence.pdf

261-cal-2002-granted-description (complete).pdf

261-cal-2002-granted-drawings.pdf

261-cal-2002-granted-examination report.pdf

261-cal-2002-granted-form 1.pdf

261-cal-2002-granted-form 18.pdf

261-cal-2002-granted-form 2.pdf

261-cal-2002-granted-form 26.pdf

261-cal-2002-granted-form 3.pdf

261-cal-2002-granted-form 5.pdf

261-cal-2002-granted-letter patent.pdf

261-cal-2002-granted-reply to examination report.pdf

261-cal-2002-granted-specification.pdf

261-cal-2002-granted-translated copy of priority document.pdf


Patent Number 221563
Indian Patent Application Number 261/CAL/2002
PG Journal Number 26/2008
Publication Date 27-Jun-2008
Grant Date 25-Jun-2008
Date of Filing 06-May-2002
Name of Patentee ROSS OPERATING VALVE COMPANY
Applicant Address 1250 KIRTS BOULEVARD, TROY, MICHIGAN
Inventors:
# Inventor's Name Inventor's Address
1 SCHABER, HUBERT DROSSELWEG 22, D-71227 RUTESHEIM
2 SCHNELL, RICHARD E. 5171 RESERVATION ROAD, OSWEGO, ILLINOIS 60543
PCT International Classification Number F15C
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 60/288,853 2001-05-04 U.S.A.