| 摘要 |
<p>1,067,848. Valves. SLOAN VALVE CO. Dec. 6, 1963 [Sept. 27, 1963], No. 48389/63. Addition to 1,054,055. Heading F2V. Improvement to the slow closing valve of Specification 1,054,055 is effected by maintaining atmospheric pressure in the dash-pot chamber 30 by means of an opening 53, through the cover 32, to a chamber 54 sealed therefrom by a thin flexible diaphragm 51; the dash-pot piston 34 additionally being provided with a sealing ring 50. The seating member 12 is also provided with an 0-ring 55 and the valve seating portion of the rubber sleeve member 10 is made in two sections; the nose portion 56 of a soft synthetic rubber moulded to a bushing 57 to which the member 10, of flexible, stiff material, is clamped by a washer 60 by threaded engagement of stem 13.</p> |
