Measuring and testing – With fluid pressure – Leakage
Patent
1987-06-04
1988-11-08
Levy, Stewart J.
Measuring and testing
With fluid pressure
Leakage
G01M 326
Patent
active
047826894
ABSTRACT:
An evacuation unit for testing the fluid tightness of a closed fluid system, filling the system with system fluid, and/or purging the system fluid of entrained gas. The evacuation unit includes a source of system fluid, an air operated venturi vacuum pump, a hose for releasable and sealable connection to an access port of the closed fluid system, and a three way valve for selected positioning between a first position communicating the vacuum pump with the flexible hose system to produce a vacuum in the system, a second position isolating the flexible hose and system to test for fluid tightness, and a third position communicating the system fluid source with the flexible hose and system for filling the system through the access port with system fluid. A method of purging entrained gas from a closed fluid system as well as a method of testing the fluid tightness of the system and filling the system with system fluid without disconnecting the evacuation unit is also disclosed.
REFERENCES:
patent: 2679747 (1954-06-01), Andrus
patent: 3122668 (1964-02-01), Cuny
patent: 3800586 (1974-04-01), Delatorre et al.
patent: 4617824 (1986-10-01), Gybulski et al.
patent: 4683745 (1987-08-01), Broughman, Jr. et al.
Levy Stewart J.
Williams Hezron E.
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