Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Reexamination Certificate
2007-02-20
2007-02-20
Keasel, Eric (Department: 3753)
Fluid handling
Destructible or deformable element controlled
Heat destructible or fusible
C137S079000, C137S457000, C137S512400, C220S088200, C431S346000, C048S192000
Reexamination Certificate
active
10834583
ABSTRACT:
A dry safety device for an inflammable gas comprises a case main body having a gas passage which terminates at one end in a primary side open port connectable to a source of inflammable gas and terminates at the other end in a secondary side open port connectable to a gas-fired appliance. A spindle undergoes sliding movement in the case main body between an open position for opening the gas passage and a closed position for closing the gas passage, and a spindle spring normally urges the spindle to the open position and permits the spindle to move to the closed position in response to a counter-flow pressure exerted on the spindle by a counter flow of inflammable gas directed from the secondary side open port to the primary side open port. A flame-extinguishing filter disposed in the gas passage extinguishes a back fire that may occur during a counter flow of inflammable gas, and a normally open shutoff valve disposed in the gas passage upstream from the filter closes the gas passage when an ambient temperature exceeds a given value.
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patent: 409021528 (1997-01-01), None
patent: 2001-289346 (2001-10-01), None
Kabushiki Kaisha Sanki
Keasel Eric
Schneider Craig M.
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