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:
Mar. 30, 1993
Filed:
Sep. 16, 1991
Alan C Green, Maidstone, GB;
Lucas Industries, Birmingham, GB;
Abstract
A fuel pumping apparatus for supplying fuel to an internal combustion engine has an injection pump supplied with fuel by a low pressure feed pump through an adjustable throttle. A fluid pressure operable piston is movable against the action of a spring to control the timing of delivery of fuel by the injection pump. Fuel under pressure is applied to the piston through a first fixed orifice from the feed pump. A second fixed orifice and a variable orifice are connected in series between a drain and the downstream side of the first fixed orifice. In parallel with the first fixed orifice is a constant pressure drop valve which maintains the pressure drops across the first fixed orifice substantially constant when the pressure drop has risen to a predetermined value.