Patent ID: 8936043
Filing Date: 2015-01-20
Classification: F16K,Y10T

Abstract:
1. A rotary valve comprising a valve block, a cavity having a radially extending wall provided by the valve block, a valve disk rotatably disposed in the cavity, the valve block having a first and a second flow passage set, the first and second flow passage sets being circumferentially spaced apart from one another relative to a longitudinal axis of the valve block and valve disk, the first and second flow passage sets each including at least four circumferentially spaced apart longitudinally extending flow passages opening longitudinally into the cavity, the valve disk including a first control passage, the valve disk having a first position in which the first control passage is aligned with two flow passages of the first set of flow passages in the valve block and a second position in which the first control passage is aligned with two flow passages of the first set of flow passages in the valve block, wherein a third flow passage and a fourth flow passage of each set of flow passages are interconnected by a connecting passage in the valve block in which the flow passages are disposed wherein the valve disk has a third position circumferentially spaced from the first and second positions the first control passage is aligned with one of the flow passages of the first set of flow passages and with one of the flow passages of the second set of flow passages when the valve disk is in the third position wherein each set of flow passages includes a fluid drain passage, a fluid inlet passage, a fluid outlet passage, the fluid inlet passage of each set of fluid flow passages is circumferentially intermediate the fluid drain passage and the fluid outlet passage along a minor arc through the fluid drain passage and the fluid outlet passage, the second position is circumferentially spaced from the first position in one rotational direction, and the third position is circumferentially spaced from the first position in a rotational direction opposite the one rotational direction.