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:
May. 09, 2000
Filed:
Jul. 30, 1999
Applicant:
Inventors:
Robert D Straub, Lowell, MI (US);
Werner Faupel, Wyoming, MI (US);
Assignee:
Diesel Technology Company, Kentwood, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417505 ; 251 50 ; 251 64 ;
Abstract
A fuel pump or injector has a control valve with a piston valve body axially movable over a motion displacement interval defined by first and second sub-intervals. A first control valve spring causes the piston valve body to be biased toward the unactuated position whenever the piston valve body is in the first sub-interval. A second control valve spring causes the piston valve body to be biased into damped engagement with the valve stop whenever the piston valve body is in the second sub-interval.