Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2009-06-25
2011-10-18
Huynh, Hai (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C123S490000, C239S585300, C251S129160
Reexamination Certificate
active
08037869
ABSTRACT:
The injector comprises a balanced metering servovalve for controlling a rod for opening/closing a nebulizer. The servovalve has a valve body having a control chamber provided with an outlet passage that is opened/closed by an axially mobile open/close element. The open/close element is made of a single piece with a bushing separate from an armature plate of an electromagnet. The bushing is coupled to a stem in an axially slidable way for closing an exhaust duct in communication with the outlet passage The open/close element is kept in a closed position by a spring that acts upon the bushing through an intermediate body connected thereto. The armature plate can be displaced with respect to the bushing between a flange of the intermediate body and a shoulder of the bushing, for eliminating the rebounds of the open/close element upon closing of the servovalve.
REFERENCES:
patent: 5203538 (1993-04-01), Matsunaga et al.
patent: 5820101 (1998-10-01), Ricco
patent: 6109541 (2000-08-01), Beatty et al.
patent: 6315531 (2001-11-01), Schwarz
patent: 7013876 (2006-03-01), Puckett et al.
patent: 7513445 (2009-04-01), Ricco et al.
patent: 7954787 (2011-06-01), Ricco et al.
patent: 2009/0320801 (2009-12-01), Ricco et al.
patent: 2010/0162992 (2010-07-01), Ricco et al.
patent: 2010/0186708 (2010-07-01), Ricco et al.
patent: 198 20 341 (1998-05-01), None
patent: 10 2004 050 992 (2006-04-01), None
patent: 0690958 (1996-01-01), None
patent: 0 851 116 (1998-07-01), None
patent: 0851114 (1998-07-01), None
patent: 1045135 (2000-10-01), None
patent: 1820958 (2007-08-01), None
patent: 1 916 414 (2008-04-01), None
patent: 1 918 568 (2008-05-01), None
patent: 2010007667 (2010-01-01), None
European Search Report dated Nov. 2, 2009, as issued in application No. 08173039.2-1263.
U.S. Appl. No. 12/491,345, Feb. 23, 2011, Notice of Allowance.
European PO; search report in foreign application (EP 08425458.0) to which priority is claimed by the present application; Nov. 28, 2008.
U.S. Appl. No. 12/491,345, Aug. 20, 2010, Office Action.
De Michele Onofrio
Gargano Marcello
Lepore Domenico
Mazzarella Carlo
Ricco Mario
C.R.F. Societa Consortile per Azioni
Huynh Hai
Workman Nydegger
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