official journal of the patent office - Controller General of Patents ...

(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) APPLICATION No: 892/CHE/2004A
(22) Date of filing of Application:03/09/2004 (43) Publication Date: 09/06/2006
(54) Title of the invention:
DYNAMICALLY-MONITORED
DOUBLE VALVE WITH RETAINED
MEMORY OF VALVE STATES.
(51)International classification:F 15 B 20/00
(31) Priority Document No.10/660,993
(32) Priority Date:12/09/2003
(33) Name of priority country:USA
(87) WIPO No. :
(61) Patent of addition to
Application No. :
Filed on:
(62) Divisional to
Applcation No.:
Filed on:
(71) Name of Applicant
ROSS OPERATING VALVE COMPANY,
Address of Applicant:
1250 BOULEVARD,TROY,MI 48084,,
U.S.A.
(72) Name of the Inventor(s):
RUSSELL,NEIL,E.
FOSTER,JOSEPH,E.
(57)Abstract
A double valve for controlling a machine tool has a memory such that when the valve is in its normal deactuated state
and the inlet air supply is cycled (e.g., turned from on to off or from off to on), then the valve remains in the
deactuated (i.e., ready to run) state. When the valve is in a faulted state (e.g., intermediate position) and the inlet air
supply is cycled, then the valve remains in the faulted state. The memory is achieved by a balanced condition of the
movable valve elements when in the normal deactuated position and an unbalanced or latched condition when in the
intermediate or faulted position.
The Patent Office Journal 09/06/2006 10835