| 摘要 |
<p>A valve bush for a dynamic multi-port valve comprises a plurality of separately formed hollow cylindrical plastics segments (33, 34, 35) interengaged in end-to-end relationship to form the bush, the or each intermediate set of small diameter apertures being in the form of a plurality of apertures, for example rectangular slots, defined by facing end surfaces of two adjacent segments (33/35 and 34/35) and by a plurality of spaced fingers (42, 43, 44, 45) extending axially from said end surfaces. A bush of the invention for a five port valve will comprise three such segments, and a bush for a three port valve will comprise two such segments. <IMAGE></p> |
