Leakage test equipment

Details Leakage test equipment Leakage test equipment

1986-09-30

1989-03-07

Lall, Parshotam S.

Boots, shoes, and leggings

73 1R, 73 492, 73 40, 364558, 364580, G01N 700, G01M 304, G01C 1738

Patent

active

048112526

ABSTRACT:
Leak test equipment which includes a master side pneumatic system and a work side pneumatic system executes a leakage test sequence basically including pressurizing, balancing and detecting steps under control of a microcomputer. A nonvolatile read/write memory has prestored therein an equivalent inner volume of the work side pneumatic system corresponding to each type of work being tested for leakage. In a leak test, a leakage .DELTA.V.sub.L =V.sub.E .multidot..DELTA.P/1.03 is calculated on the basis of a pressure difference .DELTA.P between the work side pneumatic system and the master side pneumatic system, detected in the detecting step, and a corresponding equivalent inner volume V.sub.E read out of the nonvolatile read/write memory. The calculated leakage is compared with an allowable value of leakage, thereby deciding whether the work is acceptable or not.

REFERENCES:
patent: 3504528 (1970-04-01), Weinberg et al.
patent: 4320653 (1982-03-01), Bernhardt
patent: 4490800 (1984-12-01), Powers
patent: 4523452 (1985-06-01), Brayman
patent: 4571986 (1986-02-01), Fujii et al.
patent: 4575807 (1986-03-01), Dodge
patent: 4587619 (1986-05-01), Converse, III et al.
patent: 4640122 (1987-02-01), Heraud et al.
patent: 4686851 (1987-08-01), Holm et al.

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