| 摘要 |
<p>992,277. Valves. EDWARD VALVES Inc. Sept. 20, 1962 [Feb. 28, 1962], No. 35811/62. Heading F2V. An inclined chamber 16 between an inlet 12 and an outlet 14, which forms an elliptical opening 17 with the latter, houses a movable valveclosure member consisting of a cap 70 with a guide-ring 72 and a threaded plug 66 held in place by welding 75. The plug 66 has a frusto-conical end that co-operates with a seat 78, both surfaces being of hardened abrasion resisting material. The lower end of the plug 66 incorporates an integral or builtup guide ring 82. Both guide rings 72, 82 are a close clearance fit in the chamber 16, and may be of hardened or wear-resistant material. The ring 82 also acts to throttle flow through the outlet. As applied to a manually operable lift-valve with a threaded spindle 36, the latter is connected to the cap 70 through a joint which permits the spindle to rotate independently of the closure member. The spindle 36 is provided with a packing 40 engaged by a gland 44 which is associated with a split ring 48 positioned by a flange member 52 with ears which are externally bolted to ears on the valve yoke 20 whereby the packing is compressed. The threaded part of the spindle is engaged in a yoke nut threaded and welded in position. Specification 767,435 is referred to.</p> |
