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. 16, 2001
Filed:
Jul. 23, 1999
Will W. Mathews, Greenfield, IN (US);
Navistar International Transportation Corp, Chicago, IL (US);
Abstract
A method is described for matching the lands in a spool valve (,) for a fuel injector. The spool valve (,) has a valve body (,) forming an inside surface (,) to receive the spool (,). The inside surface is measured to locate the position of contact points on the valve body (,). A starting contact point (,) is selected from the contact points on the valve body (,). The starting contact point (,) is transposed to the spool (,). The other contact points are transposed to the spool (,), preferably by using the distances between the other contact points and the starting contact point on the valve body. Grind areas are identified on the spool (,) based on the starting contact point, the other contact points, and specifications for the spool. The grind areas are ground to form lands on the spool (,) that match lands on the valve body (,). Alternatively, the lands on the valve body (,) are made based on the contact points of the spool (,)