Actuator for check valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 29, 2000
Grant Date -
N/A
app pub date -
May 18, 1998
filing date -
May 18, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An actuator is provided for a check valve, having particular utility in a dry fire control system. The check valve is responsive to a drop in the system air pressure occasioned by opening of one or more sprinkler heads in the fire control system. The movement of the actuator to its open position, establishes a water drain line therethrough, while advantageously also opening a previously sealed outlet for the pressurized air within the actuator. The actuator may respond to either the magnitude of system air pressure drop, or the rate of system air pressure drop.
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Cited Art Landscape
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