IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0776387
(2013-02-25)
|
등록번호 |
US-9080680
(2015-07-14)
|
발명자
/ 주소 |
- Minato, Tod
- Kent, Ezra
- Quintana, Rafael
|
출원인 / 주소 |
- Little Firefighter Corporation
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
7 |
초록
▼
A gas shut-off valve assembly designed to automatically close gas flow in a gas conduit in response to a seismic vibration comprises a trigger mechanism disposed in a trigger mechanism housing, a springless sealing mechanism disposed in a valve housing, a latching mechanism configured to engage the
A gas shut-off valve assembly designed to automatically close gas flow in a gas conduit in response to a seismic vibration comprises a trigger mechanism disposed in a trigger mechanism housing, a springless sealing mechanism disposed in a valve housing, a latching mechanism configured to engage the springless sealing mechanism to keep the gas conduit open, and a pressure release valve. Upon sensing a seismic vibration, the trigger mechanism disengages the springless sealing mechanism from the latching mechanism. Simultaneously, the springless sealing mechanism swings down and rotates around an axis by gravitational force to close off gas flow in the conduit. To reopen gas flow, the pressure release valve is actuated to relieve accumulated gas pressure inside the valve housing and the springless sealing mechanism is manually reset to its original open position.
대표청구항
▼
1. A seismically activated gas shut-off valve assembly adapted to automatically maintain a gas conduit in a closed position in response to a seismic vibration comprising: a trigger mechanism disposed in a trigger mechanism housing, further comprising a weight platform, a weight, and a vertically mov
1. A seismically activated gas shut-off valve assembly adapted to automatically maintain a gas conduit in a closed position in response to a seismic vibration comprising: a trigger mechanism disposed in a trigger mechanism housing, further comprising a weight platform, a weight, and a vertically movable trigger bar initially in an upward position, wherein the weight is initially positioned on the weight platform;a flapper assembly rotatable around a horizontal axis and disposed in a valve housing;a latching mechanism configured to engage the flapper assembly to initially maintain the flapper assembly in an open position and support the trigger bar in the upward position; anda pressure release valve with operating means located outside of the valve housing,wherein upon a seismic vibration, the weight is vertically displaced from the weight platform onto the trigger bar, thereby pushing the trigger bar downward to force the latching mechanism to disengage the flapper assembly and allow the flapper assembly to rotate downward and close off gas flow until the pressure release valve is manually actuated and the flapper assembly is manually reset to its original open position, andwherein the flapper assembly is further attached to a parallel flat member having a latching shaft on one end and a reset shaft on the other end, wherein the flapper assembly and the parallel flat member are rotatable around a horizontal axis of the reset shaft. 2. The gas shut-off valve assembly of claim 1, wherein the trigger mechanism housing further comprises a rotatable horizontal trigger shaft attached to a trigger shaft turn screw and a wireform adjacent to the weight, such that the weight can be manually displaced from the weight platform and actuate the trigger mechanism. 3. The gas shut-off valve assembly of claim 1, wherein the trigger mechanism housing further comprises a monitoring glass window to visually confirm whether the gas shut-off valve is either open or closed. 4. The gas shut-off valve assembly of claim 1, further comprising a turn screw located outside of the valve housing configured to manually reset the flapper assembly to its original open position. 5. The gas shut-off valve assembly of claim 1, wherein the flapper assembly further comprises a circular disk. 6. The gas shut-off valve assembly of claim 1, wherein the reset shaft further comprises a reset shaft pin that intersects the horizontal axis of the reset shaft and forces the parallel flat member and the flapper assembly to rotate upward and reopen gas flow upon manual reset. 7. A seismically activated gas shut-off valve assembly adapted to automatically maintain a gas conduit in a closed position in response to a seismic vibration comprising: a trigger mechanism disposed in a trigger mechanism housing, further comprising a weight platform, a weight, and a vertically movable trigger bar initially in an upward position, wherein the weight is initially positioned on the weight platform;a springless sealing mechanism disposed in a valve housing, further comprising a flapper assembly attached to a parallel flat member having a latching shaft on one end and an reset shaft on the other end, wherein the flapper assembly and the parallel flat member are rotatable around a horizontal axis of the reset shaft;a latching mechanism configured to engage the latching shaft to initially maintain the flapper assembly in an open position and support the trigger bar in the upward position; anda pressure release valve with operating means located outside of the valve housing,wherein upon a seismic vibration, the weight is vertically displaced from the weight platform onto the trigger bar, thereby pushing the trigger bar downward to force the latching mechanism to disengage the latching shaft and allow the springless sealing mechanism to rotate downward and close off gas flow until the pressure release valve is manually actuated and the springless sealing mechanism is manually reset to its original open position. 8. The gas shut-off valve assembly of claim 7, wherein the trigger mechanism housing further comprises a rotatable horizontal trigger shaft attached to a trigger shaft turn screw and a wireform adjacent to the weight, such that the weight can be manually displaced from the weight platform and actuate the trigger mechanism. 9. The gas shut-off valve assembly of claim 7, wherein the reset shaft further comprises a reset shaft pin that intersects the horizontal axis of the reset shaft and forces the parallel flat member and the flapper assembly to rotate upward and reopen gas flow upon manual reset. 10. The gas shut-off valve assembly of claim 7, wherein the flapper assembly further comprises a circular disk. 11. The gas shut-off valve assembly of claim 7, wherein the trigger mechanism housing further comprises a monitoring glass window to visually confirm whether the gas shut-off valve is either open or closed. 12. The gas shut-off valve assembly of claim 7, further comprising a turn screw located outside of the valve housing configured to manually reset the flapper assembly to its original open position. 13. The gas shut-off valve assembly of claim 7, wherein the pressure release valve further comprises a pressure release valve button and a pressure release valve channel. 14. A method of automatically maintaining a gas conduit in a closed position in response to a seismic vibration using a gas shut-off valve assembly comprising: placing the gas shut-off valve assembly in a section of the gas conduit;providing a trigger mechanism that positions a weight onto a weight platform adjacent to a vertically movable trigger bar that is initially in an upward position and allows the weight to be vertically displaceable;providing a trigger mechanism housing that allows the weight to be vertically displaceable and unseated from the weight platform in response to seismic vibration, the weight dropping entirely off the weight platform and onto the trigger mechanism in response to seismic vibration;providing a springless sealing mechanism disposed in a valve housing that closes off gas flow due to a seismic vibration;disengaging the springless sealing mechanism to close off gas flow; andresetting the springless sealing mechanism to its original position by manual operation. 15. The method of claim 14, wherein the step of providing a springless sealing mechanism disposed in a valve housing that closes off gas flow due to a seismic vibration further comprises attaching a flapper assembly to a parallel flat member having a latching shaft on one end and an reset shaft on the other end, wherein the flapper assembly and the parallel flat member are rotatable around a horizontal axis of the reset shaft. 16. The method of claim 14, wherein the step of providing a trigger mechanism housing that allows the weight to be vertically displaceable and unseated from the weight platform in response to seismic vibration, the weight dropping entirely off the weight platform and onto the trigger mechanism in response to seismic vibration further comprises providing a rotatable horizontal trigger shaft attached to a trigger shaft turn screw and a wireform adjacent to the weight, such that the weight can be manually displaced from the weight platform and actuate the trigger mechanism. 17. The method of claim 14, wherein the step of providing a trigger mechanism that positions a weight onto a weight platform adjacent to a vertically movable trigger bar that is initially in an upward position further comprises securing the weight platform to an upper portion of a valve housing cover of the valve housing, placing the vertically movable trigger in a slot in the valve housing cover and securing a latching mechanism configured to initially engage the springless sealing mechanism in an open position and support the trigger bar in the upward position to the valve housing cover. 18. The method of claim 17, wherein the step of disengaging the springless sealing mechanism to close off gas flow comprises vertically displacing the weight from the weight platform onto the trigger bar upon sensing the seismic vibration, vertically pushing the trigger bar down and disengaging the springless sealing valve mechanism from the latching mechanism, and allowing the springless sealing mechanism to swing down by gravitational force to close off a valve opening of the gas shut-off valve assembly. 19. The method of claim 17, wherein the step of resetting the springless sealing mechanism to its original position by manual operation comprises providing a pressure release valve with operating means located outside of the valve housing, actuating the pressure release valve to relieve accumulated gas pressure, actuating a manual reset turn screw to rotate the springless sealing mechanism in an upward direction toward the valve housing cover, relatching the springless sealing valve mechanism to the latching mechanism, and manually pushing the trigger bar back to the upward position.
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