| 摘要 |
<p>1,274,369. Valves. LEONARD VALVE CO. 29 June, 1970 [23 Dec., 1969], No. 31472/70. Heading F2V. A hot and cold water mixing valve has two inlets 13, 14 and an outlet 16. A yoke 64, which has a long-lead thread connection with a manually-operated temperature control sleeve 100, has the stems 71, 83 of hot and cold water onoff valve members 75, 89, that co-operate with screw-in seats 77, 91, secured thereto. The bottom of the sleeve 100 has a closure surface 103 and a cut-away portion (104) acting as a flow channel which co-operate with hot and cold water ports 41, 42 that are connected respectively to the inlets via passage 43, one side of pressure-equalizing spool valve 50, 51, passage 34 and seat 77 and via passage 44, the other side of pressure equalizing valve 50, 51, passage 35 and seat 91. A separately manually-operated volume control stem 115 is rotatable within the sleeve 100 and has a mixing chamber 120 with flow ports 121, 122 in the sides thereof and which individually co-operate with flow port 105 in the sleeve to permit flow to outlet chamber 17. Operation of knob 170 to rotate the sleeve 100 acts to move the two valve members 75, 89 off their seats to permit flow and simultaneously adjusts the proportion of hot and cold water entering mixing chamber 120 from ports 41, 42. Pressure equalizing valve 50, 51 acts to maintain the set temperature by inversely varying the flow of hot and cold water with respect to the pressure excess of each flow with regard to the other. The volume of mixed water is adjusted by rotation of knob 140.</p> |
