| 摘要 |
<p>1513698 Frangible pipe couplings AEROQUIP AG 23 Aug 1976 [5 Sept 1975] 35053/76 Heading F2G A coupling 10 comprises interconnected halves 12, 14 that separate by rupture of a rib 40 formed on one half 12 when the axial force, or in another embodiment axial or transverse force, on the coupling exceeds a predetermined value, the halves 12, 14 then automatically sealing by the action of pivotted valves 28, 28<SP>1</SP>. During assembly of the coupling 10 a wire 56 is inserted tangentially into a groove 54, 44 in the coupling after the halves 12, 14 are telescoped and locks them together by interfering with the rib 40 on trying to separate them. Axially movable valve supports 22, 22<SP>1</SP> within the halves 12, 14 are spring loaded 24 away from screw-threaded valve retainers 26, 26<SP>1</SP> and in the assembled coupling 10 about each other and hold the spring-loaded 34 pivotted valves 28, 28<SP>1</SP> open, ledged on lips 36 on the retainers 26, 261; separation of the halves 12, 14 allows the supports 22, 22<SP>1</SP> to move away from the retainers 26, 261 and the valves 28, 28<SP>1</SP> to close. An O-ring seal 48 is positioned between the halves 12, 14. In a second embodiment (Figs. 3-5 not shown) each half 12, 14 has a frangible rib and fits in a tubular part of a flanged connector being secured therein by a wire as before so as to be separable if the axial force exceeds a predetermined level. Each tubular part of the connector is weakened by slots so that it will break away if the shear force excedes a predetermined level; in this embodiment a tubular seal links the valve supports to minimize fluid loss on separation.</p> |
