Back to results
US 5,509,385 AGranted
Hydraulic lash adjuster metering valve
AssigneePrecision Engine Products Corp.
InventorDavid J. LaVieri
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePrecision Engine Products Corp.
InventorDavid J. LaVieri
Estimating the term…
A hydraulic lash adjuster for use in internal combustion engines has a cylindrical body with an internal chamber and a hollow plunger cap which is reciprocal within the body. One end of the plunger cap extends outwardly from the body and there is a fluid passage extending through the plunger cap end to communicate with the hollow interior of the plunger cap. There are fluid pressure feed openings in side walls of the body and plunger cap to supply fluid to the hollow interior of the plunger cap. There is a spring urging the plunger cap outwardly from the body. The plunger cap hollow interior has a generally conical metering valve seat at the internal termination of the plunger cap end fluid passage. There is a metering valve positioned within the plunger cap hollow interior and with a generally semi-spherical metering surface formed and adapted to seat against the metering valve seat. The semi-spherical metering surface has a fluid passage formed therein communicating with the plunger cap end fluid passage and the hollow interior of the plunger cap whereby a metered amount of fluid is provided from the interior of the plunger cap to the outwardly-extending end thereof during vehicle internal combustion engine operation.
In a hydraulic lash adjuster for use in internal combustion engines, a cylindrical body having an internal chamber, a hollow plunger cap reciprocal in said body and having one end thereof extending outwardly from the body, a fluid passage extending through said plunger cap and in communication with the hollow interior of the plunger cap, fluid pressure feed openings in side walls of the body and plunger cap to supply fluid to the hollow interior of said plunger cap, spring means urging said plunger cap outwardly from said body, characterized by said plunger cap hollow interior having a generally conical metering valve seat at an internal termination of said plunger cap end fluid passage, and a metering valve positioned within said plunger cap hollow interior and having a metering surface, at least in part generally semi-spherical, formed and adapted to seat against said metering valve seat, said metering surface having a fluid passage formed therein communicating with said plunger cap end fluid passage and the hollow interior of said plunger cap, whereby a metered amount of fluid is provided from the interior of said plunger cap to the outwardly extending end thereof during vehicle combustion engine operation.
Dependencies are inferred from the claim text.