Patent ID: 9334946
Filing Date: 2016-05-10
CPC Classification: F16H,F16K,Y10T

Claim Text:
1. A pressure regulator valve for use in an automatic transmission and wherein the valve is configured to be seated within a bore of a transmission so as to control fluid flow from a transmission pump to a torque converter, pressure regulator balance flow and flow to a pressure regulator dump circuit, the pressure regulator valve comprising a body including spaced first and second core portions from which first, second and third fluid flow controlling annular lands extend, the first land being formed at an inner end of the body for controlling pressure regulator balance fluid flow, the second land being spaced between the first and third lands for controlling fluid flow to a torque converter of a transmission, the second land having a rear continuously inwardly tapering conical surface that extends toward and terminates at an outer wall of the first core portion between the first and second lands, the third land being spaced from the second land for controlling fluid flow to a pressure regulator dump circuit, the third land having a rear inwardly tapering conical surface that terminates at an outer wall of the second core portion extending between the second and third lands, and a boost sleeve and spring supporting extension portion extending forward of the third land whereby the tapering surfaces of the second and third lands allow a variable flow rate to be established relative to the fluid flows being controlled thereby, and a blind hole extending from the inner end of the valve body through the first land and into the first core portion, and a balance assist spring mounted partially within the blind hole for providing force to continuously urge the pressure regulator valve against pressure regulating springs mounted about the extension portion of the valve when the pressure regulating springs are mounted within the boost sleeve surrounding the extension portion.