| 摘要 |
A dispensing apparatus for dispensing a measured amount of a first fluid into a flow of a second fluid comprises a main fluid flow conduit through which the second fluid flows, drive means mounted at least partially in the conduit such that the flow of the second fluid acts on a portion of the drive means, and pump means connected to and driven by the drive means, the pump being arranged to dispense an amount of the first fluid into the conduit, wherein the amount of the first fluid that is dispensed by the pump means in a given time is dependent on the flow rate of the second fluid acting on the drive means. The drive means maybe a wheel 20 having a plurality of blades 26. The pump means may comprise a cylinder and piston and the drive means may comprise a gear and crank to convert the rotational movement of the wheel into linear motion. |
