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:
May. 22, 2007
Filed:
Apr. 21, 2005
Mario Ricco, Valenzano, IT;
Sisto Luigi DE Matthaeis, Valenzano, IT;
Adriano Gorgoglione, Valenzano, IT;
Alfonso Di Meo, Valenzano, IT;
Mario Ricco, Valenzano, IT;
Sisto Luigi De Matthaeis, Valenzano, IT;
Adriano Gorgoglione, Valenzano, IT;
Alfonso Di Meo, Valenzano, IT;
Abstract
A control servo valve () is housed inside the casing of an internal combustion engine fuel injector (), and has an actuator (), a control chamber () communicating with a fuel inlet () and with a fuel outlet passage (), and a shutter () movable along an axis () by the actuator () between a closed position and an open position to close and open the outlet passage () respectively; the servo valve () also has a fixed axial rod () interposed between the actuator () and the control chamber (); the outlet passage () comes out through an outer lateral surface () of the axial rod (); and the shutter () is defined by a sleeve which slides axially on the outer lateral surface (), and, in the closed position, closes the outlet passage () so as to be subjected to a zero axial resultant force by the pressure of the fuel.