Fluid handling – Destructible or deformable element controlled – Destructible element
Reexamination Certificate
2000-10-16
2002-01-29
Buiz, Michael Powell (Department: 3753)
Fluid handling
Destructible or deformable element controlled
Destructible element
C137S070000, C137S073000, C137S080000, C169S057000, C169S058000
Reexamination Certificate
active
06341616
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to fluid control valves and more particularly to a high temperature fire hazard fluid release valve.
1. Field of the Invention
Relief valves for protecting equipment and piping under pressure greater than a predetermined value for releasing or stopping the flow of fluid are well known. However, there is a need for a heat responsive valve to be connected with a fluid conducting line which is responsive to excessive heat such as, heat generated by a fire in which a heat responsive element forms a fuse for moving a valve from a closed fluid flow position to an open position or vice versa.
2. Description of the Prior Art
The prior art generally reveals a plurality of heat responsive valves, commonly referred to as sprinkler valve heads, which are connected with a fluid fire retardant, usually water, which is released to control the fire in response to a predetermined temperature melting a fusible link maintaining the sprinkler head valve in a closed position which when melted by excessive heat allows fluid to be sprayed into a predetermined area for controlling fires.
This invention provides a valve which controls the flow of fluid by allowing fluid flow therethrough and responsive to the fluid being monitored by a heat fusible plug maintaining a fluid pressure responsive relief valve which monitors the fluid pressure, whether flowing or stopped, and releases the same in responsive to excessive fluid pressure but has the additional feature of a heat fusible plug maintaining a pressure responsive collapsible pin in a valve closed or open position in accordance with the type of valve being used whether inline permitting fluid flow or a right angle valve preventing fluid flow.
I am not aware of any prior art valve disclosing this pressure responsive, heat fusible plug type relief valve.
BRIEF SUMMARY OF THE INVENTION
A valve body having bolt flanges for connection with a pipeline forms a fluid passageway between the bolt flange ends. A body bore inline with the inlet port intersects the fluid passageway and forms a shoulder and sleeve-like valve seat mating and mismating with a piston type valve, having a piston rod slideably projecting axially outward through a central bore in a valve bonnet head. A pressure responsive collapsible pin projects axially outward from the end of the piston rod, opposite the piston and is slidable in a bore in a plate. The plate is supported in parallel spaced relation with the valve bonnet by a plurality of bolts forming a pin cage means. Sleeves surrounding the posts maintain the plate in spaced relation with the bonnet head and an axial threaded bore in the plate receives a bushing having an axial bore slideably surrounding the other end portion of the collapsible pin. An axial threaded opening in the plate bushing is filled with a heat fusible alloy, such as babbitt.
The principal object of this invention is to provide a pressure control relief valve having a fuse plug maintaining a pressure responsive collapsible pin holding a valve in a seated or unseated position which further includes a heat fusible plug which releases an end portion of the collapsible pin for sliding movement outwardly of the valve and allowing a valve to open for releasing fluid through the valve.
REFERENCES:
patent: 1960272 (1934-05-01), Lovekin
patent: 2637333 (1953-05-01), Houston, Jr. et al.
patent: 4896690 (1990-01-01), Taylor
patent: 5551470 (1996-09-01), Duvall
patent: 242584 (1962-12-01), None
patent: 2100350 (1982-12-01), None
Buiz Michael Powell
Krishnamurthy Ramesh
Rhea Robert K.
LandOfFree
Fire protection fluid relief valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fire protection fluid relief valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire protection fluid relief valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2835612