[특허]Pressure relief cap

Bemis Manufacturing Company

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특허 상세정보

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Pressure relief cap

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B65D-051/16
미국특허분류(USC)	220/203.26; 220/203.28; 220/203.07; 220/203.01; 220/303
출원번호	US-0842234 (2010-07-23)
등록번호	US-8353418 (2013-01-15)
발명자 / 주소	Bork, Kevin W.
출원인 / 주소	Bemis Manufacturing Company
인용정보	피인용 횟수 : 7 인용 특허 : 34

초록
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A pressure relief cap engageable with a container includes a vent passage between an interior of the cap and an exterior of the cap. A two-way pressure relief valve is located along the vent passage and is configured to open automatically in response to a positive net interior pressure exceeding a first threshold pressure and in response to a negative net interior pressure exceeding a second threshold pressure. A manual actuator is actuable from the exterior of the cap to open the two-way pressure relief valve. A plug is positioned along the vent passage in series with the two-way pressure relief valve, movable between a first position in which the vent passage is open between the two-way pressure relief valve and the exterior of the cap and a second position in which the plug closes the vent passage between the two-way pressure relief valve and the exterior of the cap.

대표
청구항
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1. A pressure relief cap comprising: a body defining an attachment structure configured to sealingly engage with a container;a vent passage selectively providing fluid communication through the pressure relief cap between an interior of the pressure relief cap and an exterior of the pressure relief cap;a two-way pressure relief valve located along the vent passage and configured to open automatically in response to a positive net interior pressure exceeding a first threshold pressure and in response to a negative net interior pressure exceeding a second threshold pressure;a manual actuator actuable from the exterior of the pressure relief cap to open the two-way pressure relief valve; anda plug positioned along the vent passage in series with the two-way pressure relief valve, the plug being movable between a first position, in which the vent passage is open between the two-way pressure relief valve and the exterior of the pressure relief cap, and a second position, in which the plug closes the vent passage between the two-way pressure relief valve and the exterior of the pressure relief cap. 2. The pressure relief cap of claim 1, wherein the plug is a screw plug threaded into the vent passage. 3. The pressure relief cap of claim 1, wherein the plug is threaded into a portion of the vent passage provided in the manual actuator. 4. The pressure relief cap of claim 1, wherein the vent passage closable by the plug is the only vent passage between the two-way pressure relief valve and the exterior of the pressure relief cap such that, when the plug is in the second position, equalization of pressures on the interior and exterior sides of the cap via the two-way pressure relief valve cannot be achieved automatically and cannot be achieved manually. 5. The pressure relief cap of claim 1, wherein the body is formed with threads providing the attachment structure, and wherein the pressure relief cap further comprises an outer cover coupled to the body with a ratcheting pawl that limits installation torque. 6. The pressure relief cap of claim 5, wherein the threads formed in the body are female threads. 7. The pressure relief cap of claim 1, wherein the magnitude of the first threshold pressure is greater than the magnitude of the second threshold pressure. 8. The pressure relief cap of claim 1, wherein the two-way pressure relief valve includes a first valve member movable in response to a positive net interior pressure exceeding the first threshold pressure and a second valve member movable in response to a negative net interior pressure exceeding the second threshold pressure, and wherein the manual actuator is movable to selectively displace the second valve member from a sealed position to an open position. 9. The pressure relief cap of claim 1, wherein the plug includes an interior passage forming at least a portion of the vent passage. 10. A pressure relief cap comprising: a body defining an attachment structure configured to sealingly engage with a container;a vent passage selectively providing fluid communication through the pressure relief cap between an interior of the pressure relief cap and an exterior of the pressure relief cap;a pressure relief valve located along the vent passage and configured to open automatically in response to at least one of a positive net interior pressure and a negative net interior pressure exceeding a prescribed threshold;a manual actuator actuable from the exterior of the pressure relief cap to open the pressure relief valve, the manual actuator forming at least a portion of the vent passage; anda plug threadably engaged with the manual actuator and positioned in series with the pressure relief valve along the vent passage, the plug being threadably movable between a first position, in which the vent passage is open between the two-way pressure relief valve and the exterior of the pressure relief cap, and a second position, in which the plug closes the vent passage between the two-way pressure relief valve and the exterior of the pressure relief cap. 11. The pressure relief cap of claim 10, wherein the pressure relief valve is a two-way pressure relief valve configured to open automatically in response to a positive net interior pressure exceeding a first threshold pressure and in response to a negative net interior pressure exceeding a second threshold pressure. 12. The pressure relief cap of claim 11, wherein the magnitude of the first threshold pressure is greater than the magnitude of the second threshold pressure. 13. The pressure relief cap of claim 11, wherein the two-way pressure relief valve includes a first valve member movable in response to a positive net interior pressure exceeding the first threshold pressure and a second valve member movable in response to a negative net interior pressure exceeding the second threshold pressure, the manual actuator being movable to selectively displace the second valve member from a sealed position to an open position. 14. The pressure relief cap of claim 10, wherein the vent passage closable by the plug is the only vent passage between the pressure relief valve and the exterior of the pressure relief cap such that, when the plug is in the second position, equalization of pressures on the interior and exterior sides of the cap via the pressure relief valve cannot be achieved automatically and cannot be achieved manually. 15. The pressure relief cap of claim 10, wherein the body is formed with threads providing the attachment structure, and wherein the pressure relief cap further comprises an outer cover coupled to the body with a ratcheting pawl that limits installation torque. 16. The pressure relief cap of claim 15, wherein the threads formed in the body are female threads. 17. The pressure relief cap of claim 10, wherein the plug includes an interior passage forming at least a portion of the vent passage. 18. A pressure relief cap comprising: a body defining an attachment structure configured to sealingly engage with a container;a vent passage selectively providing fluid communication through the pressure relief cap between an interior of the pressure relief cap and an exterior of the pressure relief cap;a two-way pressure relief valve located along the vent passage and including a first valve member configured to open automatically in response to a positive net interior pressure exceeding a first threshold pressure and a second valve member configured to open automatically in response to a negative net interior pressure exceeding a second threshold pressure, the first threshold pressure exceeding the second threshold pressure in magnitude;a manual actuator actuable from the exterior of the pressure relief cap to open the two-way pressure relief valve by selectively displacing the second valve member from a sealed position to an open position, the manual actuator forming at least a portion of the vent passage; anda plug threadably engaged with the manual actuator and positioned in series with the two-way pressure relief valve along the vent passage, the plug being threadably movable between a first position, in which the vent passage is open between the two-way pressure relief valve and the exterior of the pressure relief cap, and a second position, in which the plug closes the vent passage between the two-way pressure relief valve and the exterior of the pressure relief cap. 19. The pressure relief cap of claim 18, wherein the plug includes an interior passage forming at least a portion of the vent passage. 20. The pressure relief cap of claim 18, wherein the vent passage closable by the plug is the only vent passage between the two-way pressure relief valve and the exterior of the pressure relief cap such that, when the plug is in the second position, equalization of pressures on the interior and exterior sides of the cap via the two-way pressure relief valve cannot be achieved automatically and cannot be achieved manually.

이 특허에 인용된 특허 (34)

이 특허를 인용한 특허 피인용횟수: 7

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Pressure relief cap

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이 특허에 인용된 특허 (34)

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Pressure relief cap

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이 특허에 인용된 특허 (34)

이 특허를 인용한 특허 피인용횟수: 7

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