Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1989-11-13
1991-02-05
Rivell, John
Fluid handling
Line condition change responsive valves
Direct response valves
137512, 251337, F16K 1503
Patent
active
049896350
ABSTRACT:
A check valve with a reduced hold-open pressure includes a biasing device, such as a spring, directly connected to a pivoting clapper at one end and to the valve body at the other end. No intervening pivoting links are used between the spring and the clapper. Preferably, the clapper is connected only by being pivoted to the valve body and by the spring connecting it to the valve body.
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"Installation Maintenance and Parts Manual for Backfow Prevention Assemblies," Ames Co., Inc. pp. 7-8 and 12. Date unknown.
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CMB Industries, Inc.
Rivell John
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