초록 ▼

The present invention provides an oil pressure relief valve having grooves along the wall of the piston. These grooves channel pressurized oil through areas of the vents which are most susceptible to debris buildup. This channeling of pressurized oil acts to flush the vents and wipe away debris. As

The present invention provides an oil pressure relief valve having grooves along the wall of the piston. These grooves channel pressurized oil through areas of the vents which are most susceptible to debris buildup. This channeling of pressurized oil acts to flush the vents and wipe away debris. As a result, the valves are able to operate freely.

대표청구항 ▼

[ What is claimed is:] [1.] A pressure relief valve for a lubrication system of a vehicle, comprising:a housing having a generally cylindrical bore, said cylindrical bore having a first end and a second end, said first end having an external passageway for conducting lubricant from a high pressure s

[ What is claimed is:] [1.] A pressure relief valve for a lubrication system of a vehicle, comprising:a housing having a generally cylindrical bore, said cylindrical bore having a first end and a second end, said first end having an external passageway for conducting lubricant from a high pressure side of said lubrication system into and out of said cylindrical bore;a piston disposed within said cylindrical bore, said piston biased toward said external passageway by a biasing member, and said piston in a sealing relationship therewith, said piston having a piston bore in an end of said piston proximate said external passageway, said piston having at least one hemispherically shaped vent hole disposed on an external surface of said piston and passing into said piston bore, said hemispherical shape defining two corner portions, said piston having at least one groove extending along said external surface of said piston and intersecting said vent hole; andsaid cylindrical bore having an aperture disposed therein, said lubricant forcing said piston against said biasing member and positioning said groove to provide fluid communication between said groove and said piston bore when said lubricant is at a predetermined pressure.