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:
Aug. 31, 1982
Filed:
Jan. 13, 1981
Ivor Fenne, Greenford, GB;
Lucas Industries Limited, Birmingham, GB;
Abstract
A fuel injection nozzle unit includes a differential valve member biased by a spring to a closed position and opened to allow fuel flow through an outlet by fuel under pressure from an inlet. The spring is housed within a spring chamber and fuel leaking into this chamber is vented to the inlet when delivery of fuel has ceased. A relief valve is provided which has a valve element having a surface exposed to the pressure in the chamber and an opposing surface exposed to the pressure exterior of the nozzle unit. The valve element is biased to a closed position by a spring and it controls flow along a path from the chamber to the inlet. The flow path also incorporates a non-return valve. The valve element is set to lift from its seating at a pressure which is greater than the residual pressure in the inlet plus the pressure required to open the non-return valve.