| 摘要 |
A fluid jet control nozzle comprises a plastics sleeve 30 screw-threaded co-axially upon a cylindrical metal body 10. Inlet and outlet bores 11, 12 in the body communicate with a sealed annular chamber formed between the sleeve and the body, and a valve constituted by co-acting frusto-conical surfaces 34, 23 respectively provided in the sleeve and on the body prevents or permits the flow of water from the inlet to the outlet depending upon the axial position to which the sleeve is moved upon the body by virtue of the screw thread. <IMAGE> |
