Patent ID: 8813783

Claim:
A valve ( 103 ), comprising: a housing ( 104 ) defining an internal bore ( 209 ) and plurality of fluid ports ( 107 a , 107 b , 108 a , 108 b ); a rotatable spool ( 210 ) positioned within the internal bore ( 209 ) and rotatable about a longitudinal axis (X-X) wherein the internal bore ( 209 ) comprises three or more cross-sectional diameters (D 1 , D 2 , D 3 ), and wherein the entire first canted seal ( 217 ) is positioned within a portion of the internal bore ( 209 ) comprising a single cross-sectional diameter when the first fluid port ( 107 a ) is sealed off from the second fluid port ( 107 b ) and wherein the entire second canted seal ( 218 ) is positioned within a portion of the internal bore ( 209 ) comprising a single cross-sectional diameter when the third fluid port ( 108 a ) is sealed off from the fourth fluid port ( 108 b ) and wherein transitional sections between the cross-sectional diameters (D 1 , D 2 , D 3 ) are at least partially rounded off at an intersection of a port and the internal bore ( 209 ); a first canted seal ( 217 ) positioned on the rotatable spool ( 210 ) at an angle (e) with respect to the longitudinal axis (X-X); and a second canted seal ( 218 ) positioned on the rotatable spool ( 210 ) at an angle (˜) with respect to the longitudinal axis (X-X).