| 摘要 |
<p>1,196,329. Valves. PATINVEST PATENTUND INVESTMENT A.G. 27 July, 1967 [29 July, 1966], No. 34643/67. Heading F2V. [Also in Divisions G1 and G2-G3] An axially movable valve member 3 is provided with a resilient independently-movable sealing washer 6 adapted to co-operate with seat 2 either as the result of movement of member 3 or under the control of solenoid-actuated valve member 13 which varies the pressure behind the washer, fluid has access to the rear of the washer via aperture 7 and projections 9. When the valve is fully closed, the rear of the washer obturates orifice 10. During normal use, the washer responds to variations in inlet pressure to maintain the flow rate constant. In the thermostatic flow mixer of Fig. 3, sealing washers 40, 41 operable as above to control hot and cold inlets 23, 24 are carried in pockets in an annular member 28 which is axially adjustable to determine the flow rate by handle 37 via nut 32. A thermally-sensitive plastics diaphragm 52 acts via pin 55 and lever 53 on pilot valves 44, 45 controlling washers 40, 41, the set temperature being determined by knob 62 which varies the load exerted on diaphragm 52 by spring 60. When fully closed, needles 72 in the inlets cooperate with the washer apertures 46 to define check valves. In Fig. 5, handle 37 effects axial adjustment of member 28 through a ball cage 76 co-operating with an inclined race 77. The thermally-sensitive diaphragm 52 is carried by rocking disc 74 which is coated at 75 to co-operate directly with orifices 42, 43. Leaf spring 73 loads disc 74.</p> |
