Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1981-12-14
1984-02-14
Ruehl, Charles A.
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
73 37, G01L 2700, G01M 1900
Patent
active
044308841
ABSTRACT:
A method testing a marine hydraulic release of the type used to secure life rafts and the like to ships comprising placing the hydraulic release on a tension stand and applying tension to it to approximate service conditions, characterized in that the method further comprises placing a load cell in direct line with the hydraulic release on the tension stand, the load cell being connected to a tension indicating device, and gradually increasing the tension on the hydraulic release unit by a desired level as determined by the load cell output on the indicating device, thereafter release testing the tensioned hydraulic release unit under superatmospheric air pressure and tension approximating actual service conditions while the hydraulic release and load cell remain undisturbed and under tension. Prior to the application of the air pressure, by monitoring the tension indicating device while the hydraulic release and load cell are under tension, during a period when the adjusting device is not disturbed, a deteriorated condition of the hydraulic release may be detected by gradual decrease of the tension reading, that might not otherwise be detected.
REFERENCES:
patent: 2450909 (1948-10-01), O'Neil
patent: 4018079 (1977-04-01), Landrigan
patent: 4217772 (1980-08-01), Katz
Landrigan Corporation
Ruehl Charles A.
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