Method and apparatus for the leak testing of filters
USRE31952E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1984 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Apr 11, 2004 |
Classification
- Technology area (CPC —)General
Abstract
A method and apparatus for the leak testing of one or more filters, which requires minimum space, and which comprises a housing adapted to sealably mount the filters .[.means.]. .Iadd.apparatus .Iaddend.for introducing DOP particles within the housing and immediately upstream of each of the filters, and a funnel-shaped member mounted in the housing upstream of each filter and downstream of the point at which the DOP is introduced. The member may be selectively positioned to assume an operative position transverse to the airstream wherein it acts to condense and mix the airstream and DOP and then disperse the mixture over the full frontal area of the adjacent filter, or a non-operative position wherein the member is substantially withdrawn from the airstream. .[.Means.]. .Iadd.Apparatus .Iaddend.are also mounted downstream of each filter for monitoring the airstream to detect DOP particles, and thereby permit a determination as to whether any of the particles are leaking through or around the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.