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:
Jul. 26, 1983
Filed:
Feb. 23, 1981
Dennis A Wilber, Elizabethtown, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
A fuel injector and valve assembly (2) including a unit injector (4) having a main pumping plunger (10) and a shuttle piston (14) selectively connected to the pumping plunger by means of a hydraulic link controlled by a ball-type solenoid operated valve (28). The valve includes a housing (58) containing a valve cavity (76) in which a ball (78) is positioned for movement between a closed position and open position in less than one millisecond to control the timing and metering function of the fuel injector (4). The ball (78) is biased to the closed position by a spring (88) and is moved to an open position by an operator stem (98) biased by a stronger opposing spring (116) surrounding the operator stem (98). The operator stem (98) is withdrawn by energization of solenoid (118) to allow the ball (78) to be moved to the closed position by the ball spring (88). An extremely simple structural configuration is employed including inner and outer valve housing members (62,72) arranged to form valve cavity (76) when assembled and including an operator housing (90) connected in a manner to allow the retracted position of the operator stem (98) to be adjusted by simple relative rotational movement of the operator and valve housings (58,90).