Method and apparatus for leak test

Details Method and apparatus for leak test Method and apparatus for leak test

1983-08-29

1986-03-11

Krass, Errol A.

Boots, shoes, and leggings

73 40, 340605, 364510, G01M 326, G01N 700

Patent

active

045758077

ABSTRACT:
To measure the leak rate in a transmission partially filled with a transmission fluid but having an air space of unknown volume, air is supplied to the transmission to pressurize the cavity to a preset value. The flow rate of air to the transmission is measured and that rate is integrated in a computer to determine the mass air flow which is proportional to the volume of the air space in the transmission. The decline of pressure in the air space as a result of fluid leakage from the transmission is monitored by the computer and the leak rate is determined on the basis of that rate and the derived volume of the air space.

REFERENCES:
patent: 3918291 (1975-11-01), Pauly et al.
patent: 4269061 (1981-05-01), Hatsuno et al.
patent: 4494402 (1985-01-01), Carney
patent: 4502842 (1985-03-01), Currier et al.
patent: 4523452 (1985-06-01), Brayman

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