Metal deforming – Process – Tube making or reshaping
Reexamination Certificate
2001-06-29
2003-04-15
Larson, Lowell A. (Department: 3725)
Metal deforming
Process
Tube making or reshaping
C072S479000, C029S523000
Reexamination Certificate
active
06546779
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to forming tools and more particularly to a tool for forming an armature guide eyelet disposed in a solenoid actuated fuel injector with a feature that limits rotation of the closure assembly of the fuel injector.
BACKGROUND OF THE INVENTION
It is believed that tools exist for forming the inside diameter of an armature guide eyelet. The armature guide eyelet that is disposed in a fuel injector, is such an eyelet. These tools form a uniform inner diameter of the armature guide eyelet. The uniform inner diameter fails to limit rotation of the closure assembly within the fuel injector.
It would be beneficial to provide a tool to form a non-uniform armature guide eyelet for use in a fuel injector to limit rotation of a closure assembly of the fuel injector.
BRIEF SUMMARY OF THE INVENTION
The present invention provides a tool for forming an armature guide eyelet. The armature guide eyelet that is formed by the tool is disposed in a solenoid actuated fuel injector to limit relative rotation between the closure member and its support member. The tool preferably includes a body having a working end, a support end and at least one sizing rib disposed along a longitudinal axis. The at least one sizing rib has a perimeter with a first portion and a second portion. The first portion has a substantially constant distance D
c
from the longitudinal axis. The second portion has a varying distance D
v
from the longitudinal axis.
Further, the present invention also provides a method of forming an armature guide eyelet to be used in a solenoid actuated fuel injector. The method can be achieved by aligning at least one non-uniform sizing rib and an armature guide eyelet having a constant inner diameter along a longitudinal axis, and forming the constant inner diameter of the armature guide eyelet into a non-uniform inner diameter with the at least one non-uniform sizing rib.
REFERENCES:
patent: 3017793 (1962-01-01), Appel
patent: 4262271 (1981-04-01), Bowers et al.
patent: 4331317 (1982-05-01), Kamai et al.
patent: 4382554 (1983-05-01), Hofmann
patent: 4394964 (1983-07-01), Ecomard et al.
patent: 4679017 (1987-07-01), Mishler et al.
patent: 4701993 (1987-10-01), Bradley et al.
patent: 4771627 (1988-09-01), Speakman
patent: 4871989 (1989-10-01), Gross
patent: 4934170 (1990-06-01), Easterbrook et al.
patent: 5127584 (1992-07-01), Sczomak
patent: 5875972 (1999-03-01), Ren et al.
patent: 6199539 (2001-03-01), Pearlman et al.
patent: 6227457 (2001-05-01), Oliver
Patent Appln. No. 09/770,980, Jack D. Oliver, filed Jan. 26, 2001, pending.
Larson Lowell A.
Siemens Automotive Corporation
LandOfFree
Eyelet sizing tool for a needle/armature rotation limiting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Eyelet sizing tool for a needle/armature rotation limiting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eyelet sizing tool for a needle/armature rotation limiting... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3098451