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:
Apr. 28, 1987
Filed:
Sep. 25, 1985
John H Gieseking, Detroit, MI (US);
United Technologies Diesel Systems, Inc., Springfield, MA (US);
Abstract
An electromagnetically-actuated fuel injector of the type having a spring-biased flat armature and a ball valve element is provided with an improved arrangement for preventing wobble or flutter of the armature, particularly during operation. The armature and ball valve are urged to the closed position by a helical coil spring coaxially aligned with and acting in compression against the armature. The end of the spring in engagement with the armature is modified or formed such that it includes a portion which is inclined axially from a plane normal to the axis of the armature so as to concentrate most of the axial spring force at the location where it engages the armature. As that location is to one side of the axis of the armature, the remote, or opposite, edge of the armature forms a pivot with a stationary part of the injector and reduces or eliminates armature wobble.