| 摘要 |
<p>1,080,260. Valves. ROSS OPERATING VALVE CO. July 8, 1966 [Oct. 14, 1965], No. 30872/66. Heading F2V. A spool valve comprises an inlet 14, work ports 15, 16 and exhaust ports 17, 18, the spool 21 having lands 32-34 co-operating with 0- rings 39, 41, 42, 43. The latter are held in place by resilient spacers 44-48, each spacer comprising a pair of end rings (52, 53) connected by four equally-spaced, axially extending bars (54-57). The bar (57) adjacent a port spans the diameter of the port and extends radially outwardly relative to the other bars so that when the spacer is inserted in the bore 19 this bar (57) snaps into the port to locate the spacer. The bar (57) may be wider than the other bars so that it may be easily identified. Movement of the spool is effected by means of pistons 22 located in end-caps 24 supplied at 27.</p> |
