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发明授权
US4732188A Fuel tank cap with pressure/thermal relief 失效
带压力/热释放的油箱盖

Fuel tank cap with pressure/thermal relief
摘要：
A valve plug (22, 22a, 22b) is biased inwardly by a spring (78, 78a, 78b) to close an opening (6, 6a, 6b) in a tank. A stem (32, 32a, 32b) extends axially inwardly from the plug (22, 22a, 22b). The stem (32, 32a, 32b) has an inner portion (36, 36a, 36b) which is mechanically interlocked with an outer portion (52, 52a, 52b) to directly transmit axial forces created by the spring (78, 78a, 78b). Fusible material (66, 66a, 66b) holds the stem portions (36, 36a, 36b, 52, 52a, 52b) in an interlocking position but carries only relatively small loads. The plug (22, 22a, 22b) and stem (32, 32a, 32b) move against the force of the spring (78, 78a, 78b) to relieve pressure. At elevated temperatures, the fusible material (66, 66a, 66b) melts to allow the stem portions (36, 36a, 36b, 52, 52a, 52b) to separate and the plug (22, 22a, 22b) and outer stem portion (52, 52a, 52b) to move away from the opening (6, 6a, 6b).
摘要（中）：

阀塞（22,22a，22b）被弹簧（78,78a，78b）向内偏压以封闭箱体中的开口（6,6a，6b）。 杆（32,32a，32b）从插头（22,22a，22b）轴向向内延伸。 杆（32,32a，32b）具有与外部部分（52,52a，52b）机械地互锁的内部部分（36,36a，36b），以直接传递由弹簧（78,78a，78b）产生的轴向力 ）。 可熔材料（66,66a，66b）将杆部（36,36a，36b，52,52a，52b）保持在互锁位置，但仅承载相对较小的载荷。 插塞（22,22a，22b）和杆（32,32a，32b）抵抗弹簧（78,78a，78b）的作用力移动以减轻压力。 在升高的温度下，可熔材料（66,66a，66b）熔化以允许茎部分（36,36a，36b，52,52a，52b）分离并且插头（22,22a，22b）和外部茎部分 52,52a，52b）离开开口（6,6a，6b）。

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