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:
Jun. 07, 2011
Filed:
Jan. 29, 2008
Mario Ricco, Casamassima, IT;
Raffaele Ricco, Valenzano, IT;
Antonio Gravina, Valenzano, IT;
Marcello Gargano, Valenzano, IT;
Sergio Stucchi, Valenzano, IT;
Onofrio DE Michele, Valenzano, IT;
Mario Ricco, Casamassima, IT;
Raffaele Ricco, Valenzano, IT;
Antonio Gravina, Valenzano, IT;
Marcello Gargano, Valenzano, IT;
Sergio Stucchi, Valenzano, IT;
Onofrio De Michele, Valenzano, IT;
C.R.F. Societa Consortile per Azioni, Orbassano, IT;
Abstract
The injector comprises a balanced metering servovalve to control a rod for the opening/closing of a nozzle. La servovalve has a valve body with a control chamber radially delimited by a tubular portion and fitted with an outlet passage that is opened/closed by an axially movable shutter. The servovalve is also integral with an axial stem, provided with a lateral surface, through which the outlet channel exits. The shutter is coupled to the stem in an axially sliding manner and, when it closes the outlet passage, it is subjected to substantially null axial fuel pressure. The outlet passage has a calibrated segment distanced from the shutter and close to a bottom wall of the control chamber. The calibrated segment is carried by an element fixed to the valve body in correspondence to an axial segment of the outlet passage.