Patent ID: 8776637
Filing Date: 2014-07-15
Classification: F16D,F16H,F16L,Y10T

Abstract:
1. A fluid retention assembly for a vehicle transmission, the fluid retention assembly comprising: a valve housing having a first portion, a second portion, a third portion, and defining a central bore having a sealing portion, wherein the first portion is substantially cylindrically shaped and has a first diameter, the second portion is adjacent the first portion and has a substantially cylindrical shape that is coaxial with the first portion and has a second diameter that is larger than the first diameter of the first portion, and wherein the third portion is adjacent the second portion and has a substantially cylindrical shape that is coaxial with the first and second portions; a first member disposed at least partially in the central bore of the valve housing and including a shaft portion and a sealing portion opposing the sealing portion of the valve housing; a second member that is substantially disc shaped and defines a plurality of fluid apertures, wherein the second member is attached to the shaft portion of the first member opposite the sealing portion; and a biasing member disposed at least partially in the central bore of the valve housing coaxial with the first member and having a biasing force that biases the sealing portion of the first member against the sealing portion of the valve housing, and a hydraulic assembly, wherein the hydraulic assembly includes a housing, a fluid passageway in hydraulic communication with an exterior of the housing, and a hydraulic distribution system in hydraulic communication with the fluid passageway, and wherein the first portion of the valve housing is sealed to the fluid passageway and the second portion of the valve housing is sealed to the housing of the hydraulic assembly, and wherein an ingress of dust and contaminants to the fluid passageway of the hydraulic assembly is substantially restricted when the external net force on the first and second members is less than the biasing force of the biasing member; and wherein a bi-directional fluid flow between the first portion and the third portion of the valve housing is substantially restricted in the absence of an external net force on the first and second members and the bi-directional fluid flow is substantially unrestricted when the external net force on the first and second members exceeds the biasing force of the biasing member.