IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0420008
(1989-10-10)
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발명자
/ 주소 |
- Gabrlik Zdenek (Seattle WA) Morris John M. (Auburn WA) Oliphant Timothy L. (Federal Way WA) Green Charles J. (Vashon WA) Phillips Nelson O. (Vashon WA 4)
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출원인 / 주소 |
- GT Development Corporation (Tukwila WA 02)
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인용정보 |
피인용 횟수 :
1 인용 특허 :
0 |
초록
▼
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 oute
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).
대표청구항
▼
A pressure relief valve for a tank comprising: a valve plug positioned outwardly of an opening in the tank defined by a tank body portion; biasing means for biasing the valve plug axially inwardly into a position in which it closes the opening; said biasing means comprising a spring; and said spr
A pressure relief valve for a tank comprising: a valve plug positioned outwardly of an opening in the tank defined by a tank body portion; biasing means for biasing the valve plug axially inwardly into a position in which it closes the opening; said biasing means comprising a spring; and said spring having an inner end located axially inwardly of the valve plug and the opening, and an outer end that engages said body portion; and a structure forming an interconnection between the valve plug and said inner end of said spring; said structure including an abutment that abuts said inner end of said spring, and fusible material positioned to maintain said interconnection; said spring being resilient to allow said structure and the valve plug to move outwardly in response to increased pressure in the tank to relieve pressure in the tank; and said fusible material being located inwardly of the valve plug and being meltable at elevated temperatures exceeding a predetermined level, to release said interconnection to allow the valve plug to move outwardly away from the opening.
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