A pressure indicating device for detecting and isolating leakage of toxic and/or pyrophoric gasses from within various packages is disclosed. The device can affix to a user port of a cylinder package. The device has a flexible disc-like structure which is fine tuned to outwardly flex in response to
A pressure indicating device for detecting and isolating leakage of toxic and/or pyrophoric gasses from within various packages is disclosed. The device can affix to a user port of a cylinder package. The device has a flexible disc-like structure which is fine tuned to outwardly flex in response to a build-up of pressure of the gas exerted against the disc-like structure. The flexed disc contacts a movable pin and pushes the push outwards from within the device. The outward movement of the pin pierces a paper seal extending over the device, thereby indicating a leak from within the valving of the package. The device withstands the pressure exerted against it, thereby also isolating the leak of the pressurized gas.
대표청구항▼
1. A pressure indicating device for recording and isolating a leak of pressurized gas from a closed valve of a gas cylinder, comprising: a housing defined, in part, by an upper housing portion and a lower housing portion, the upper housing portion characterized by an inner channel extending therethr
1. A pressure indicating device for recording and isolating a leak of pressurized gas from a closed valve of a gas cylinder, comprising: a housing defined, in part, by an upper housing portion and a lower housing portion, the upper housing portion characterized by an inner channel extending therethrough, and the lower housing portion characterized by a gas flow channel extending therethrough, the lower housing portion disposed within a user port of the cylinder valve;a movable pin disposed within the interior channel of the upper housing portion;a solid diaphragm in a neutral state disposed between the upper and the lower housing portions, the diaphragm having a bottom surface and a top surface, the top surface of the solid diaphragm oriented towards the pin, and the bottom surface of the solid diaphragm oriented towards the lower housing portion, wherein the bottom surface is in fluid communication with the gas flow channel, the diaphragm sealed in place along an edge thereof;a seal extending along an outer surface of the upper housing through which the pin is configured to extend when said pin is in the activated state;wherein the solid diaphragm is configured to flex from a neutral state to an activated state towards the pin in response to a predetermined activating pressure exerted against at least a portion of the bottom surface of the diaphragm, the diaphragm in the activated state flexing a sufficient amount against the pin so that a portion of the top surface of the diaphragm urges the pin from within the inner channel a sufficient axial distance through the upper housing so as to move the pin externally of the housing, thereby allowing the pin to pierce the material and visually indicate the leak of the pressurized gas from within the interior volume of the cylinder. 2. The device of claim 1, further comprising a stabilizing material disposed within an interior volume of the upper housing portion, the stabilizing material being substantially stationary and surrounding one or more surfaces of the pin. 3. The device of claim 2, wherein a predetermined gap exists between the stabilizing material and the pin, the pin configured to slidably move towards the stabilizing material when the diaphragm moves from the neutral state to the activated state. 4. The device of claim 1, further comprising a reservoir defined in part by the lower housing portion and the bottom surface of the diaphragm. 5. The device of claim 4, wherein the gas flow channel terminates into the reservoir. 6. The device of claim 1, wherein the device has a pre-defined first gap between at least a portion of the bottom surface of the stabilizing material and the top surface of the diaphragm in the neutral state. 7. The device of claim 1, wherein the device has a pre-defined third gap between a surface of the lower housing portion and the bottom surface of the diaphragm in the activated state. 8. The device of claim 1, wherein the diaphragm in the activated state is maintained in the flexed configuration whereby the bottom surface of the diaphragm is spaced apart from the lower housing with the bottom surface of the diaphragm at a pressure equal to or greater than the predetermined activating pressure. 9. A system for isolating and indicating a leak of pressurized gas, comprising: a cylinder for holding a pressurized gas;a user pathway defined in part by a valve body affixed to an upper part of the cylinder;a pressure indicating cap having an upper housing and a lower housing mated thereto, the lower housing threadably engaged within the user pathway of the cylinder, the lower housing having a gas flow channel configured to receive a flow of the pressurized gas;the cap further comprising a disc disposed between the upper housing and the lower housing, the disc having a periphery fixably attached to corresponding edge portions of the upper and the lower housing;a movable pin situated within the upper housing, the pin spaced apart a predetermined distance from the top surface of the disc;wherein the top surface of the disc is configured to flex from a neutral state towards the pin in response to a predetermined accumulation of pressure within the gas flow channel that is exerted against the bottom surface of the disc, the top surface of the disc flexed a sufficient amount to exert a force that pushes the pin outwardly from the upper housing in an axial direction so as to record a pressure leak. 10. The system of claim 9, further comprising a stabilizing material disposed within the upper housing, the stabilizing material having a channel into which the pin slidably engages. 11. The device of claim 10, further comprising a central axis of the device extending through the gas flow channel, the main body portion of the disc and the axially extending portion of the movable pin. 12. The device of claim 10, wherein the stabilizing material has a rigidity greater than the disc. 13. The device of claim 10, wherein the disc in the neutral state has the bottom surface substantially in contact with the lower housing, and the disc in the flexed state has at least a portion of the bottom surface spaced away from the lower housing with a corresponding portion of the top surface in contact with the pin and the stabilizing material. 14. The system of claim 9, wherein the gas flow channel terminates into a reservoir. 15. The device of claim 9, further comprising a seal extending along an outer surface of the upper housing through which the pin is configured to extend when said pin is in the activated state. 16. The device of claim 9, wherein the pin comprises a spring coiled around the pin. 17. The device of claim 16, wherein the spring is wound to a pressure sufficient to prevent axial extension of the pin from within the upper housing in the absence of the predetermined accumulation of pressure within the gas flow channel exerted against the bottom surface of the disc. 18. The device of claim 9, wherein the disc is maintained in a flexed configuration, wherein the bottom surface of the disc is spaced apart from the surface of the lower housing. 19. The device of claim 18, wherein the bottom surface of the disc is at cylinder pressure or lower.
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이 특허에 인용된 특허 (5)
Nixon Ronald A. (Mansfield OH) Yagher ; Jr. Charles (Lexington OH), Combined pressure cutoff and pressure relief valve.
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