Patent ID: 8783995

Claim:
A coupling device for coupling an input shaft to an output shaft, comprising: a housing having a first end and a second end, the first end being longitudinally spaced from the second end; a first set of splines defined along an inner wall of the housing, the first set of splines disposed near the first end configured for engaging splines of the input shaft; a second set of splines defined along the inner wall of the housing, the second set of splines disposed near the second end for engaging splines of the output shaft; a first outlet defined in the housing near the first end and a second outlet defined in the housing near the second end; a central region defined within the housing between the first set of splines and the second set of splines, the central region including a first inlet defined in the inner wall between the shoulder and the first set of splines through which fluid can be received therein; and a portion of the inner wall protruding inwardly into the central region, the portion forming a shoulder configured to force fluid to flow around the shoulder and through the central region to the first and second sets of splines; wherein, the length of the first set of splines is substantially the same as the length of the second set of splines; further wherein, the first set of splines is longitudinally spaced from the second set of splines such that the central region is defined therebetween, and the first set of splines form at least part of the first outlet and the second set of splines form at least part of the second outlet wherein the first inlet, central region, first outlet and second outlet are fluidly coupled to one another.