Patent ID: 8540054

Claim:
A system, comprising: a valve assembly, comprising: a rotary valve, comprising: a cylindrical valve body having a longitudinal axis; a first bore extending lengthwise through the cylindrical valve body along the longitudinal axis; a first opening extending radially into the cylindrical valve body to the first bore; a second opening extending radially into the cylindrical valve body to the first bore; a third opening extending radially into the cylindrical valve body to the first bore; a fourth opening extending radially into the cylindrical valve body to the first bore, wherein the third and fourth openings are circumferentially offset from one another about the longitudinal axis; and a valve block supporting the rotary valve, wherein the valve block comprises: a block body; a second bore extending into the block body, wherein the cylindrical valve body is disposed in the second bore, and the first and second bores are coaxial with one another along the longitudinal axis; a first passage extending into the block body to the second bore, wherein the first opening and the first passage are disposed at a first axial position along the longitudinal axis; a second passage extending into the block body to the second bore, wherein the second opening and the second passage are disposed at a second axial position along the longitudinal axis; and a third passage extending into the block body to the second bore, wherein the third and fourth openings and the third passage are disposed at a third axial position along the longitudinal axis, and the third axial position is spaced axially between the first and second axial positions; wherein the rotary valve is configured to selectively rotate between a first rotational position and a second rotation position, wherein the first rotational position fluidly couples the first opening with the first passage, fluidly uncouples the second opening from the second passage, fluidly couples the third opening with the third passage, and fluidly uncouples the fourth opening from the third passage, wherein the second rotational position fluidly uncouples the first opening from the first passage, fluidly couples the second opening with the second passage, fluidly uncouples the third opening from the third passage, and fluidly couples the fourth opening with the third passage.