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:
Jan. 19, 1982
Filed:
Jul. 21, 1980
Richard S Knape, Grand Rapids, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An electromagnetic fuel injector has an axially extending guide pin fixed to an armature and slidably received in the solenoid pole piece to axially guide the armature during its movement thereof relative to the solenoid pole piece. The guide pin has a sleeve supported thereon for engagement at one end with a surface of the armature and extending at its opposite end axially outboard the armature for abutment against the solenoid pole piece whereby to serve as an abutment stop so as to establish a predetermined minimum working air gap between the opposed working surfaces of the armature and an associated solenoid pole piece. An armature return spring has one end thereof in abutment with a free end of the guide pin to bias the armature in an axial direction away from the solenoid pole piece and has its opposite end in abutment against an externally accessible abutment screw whereby the force of the armature return spring can be adjusted as desired. In a preferred embodiment, an additional spring is operatively positioned to assist the armature return spring.