Method for testing a waterproof casing

Details Method for testing a waterproof casing Method for testing a waterproof casing

1993-09-07

1994-05-03

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 40, 73 492, G01M 326, G01M 332

Patent

active

053076699

ABSTRACT:
A method for testing a waterproof casing having a flexible watertight portion having a flexible waterproofing portion, which is compressed to establish a water tight seal, and a stationary watertight portion, in which the watertightness is established by an adhesive, using a test casing to serve as the adjoining element, wherein the flexible waterproofing portion and the test casing together define a closed chamber, and wherein an air pressure change can be effected in the chamber through the test casing. The method includes the steps of establishing a first air pressure in the closed chamber, less than atmospheric pressure, which causes elastic deformation of the flexible waterproofing portion, and subsequently detecting a change in internal air pressure of the closed chamber. The method further includes the steps of establishing a second air pressure in the closed chamber, less than atmospheric pressure, but greater than the first air pressure, which causes a smaller elastic deformation of the flexible waterproofing portion than the first air pressure and, subsequently detecting a change in internal air pressure of the closed chamber.

REFERENCES:
patent: 2108176 (1938-02-01), Newby
patent: 2679747 (1954-06-01), Andrus
patent: 3355932 (1967-12-01), Mulligan
patent: 4534208 (1985-08-01), Macin et al.

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