Gas separation – With separating media bypass or system gas pressure relief – Valved bypass means
Patent
1983-10-17
1987-03-17
Moore, Chris K.
Gas separation
With separating media bypass or system gas pressure relief
Valved bypass means
55387, 55467, 55528, 15415R, B01D 5000
Patent
active
046505059
ABSTRACT:
The present invention relates to an apparatus for cleaning hazardous or toxic solid and liquid substances. The apparatus generally comprises a vacuum cleaner having a housing and an arrangement for drawing a fluid flow from an inlet to an outlet of the housing. A first filter is provided for separating and retaining both macro- and micro-particles of the substance entrained with the fluid flow. The first filter is arranged on a downstream side of the inlet of the housing and has a reservoir portion arranged below the inlet. Walls of the first filter permit outflow of substantially only vapors of the substance entrained in the fluid flow. A second filter for retaining the vapors is arranged fluidically between the first filter and the outlet. In a particularly preferred embodiment, the first filter includes a microporous filter membrane which is laminated to a fibrous support to provide a self-supporting unitary first filter for accomplishing the separation of the macro- and micro-particles of the substance.
REFERENCES:
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patent: 2521465 (1950-09-01), Leon
patent: 3815341 (1974-06-01), Hamano
patent: 4018687 (1977-04-01), Zahour
patent: 4130487 (1978-12-01), Hunter et al.
patent: 4324574 (1982-04-01), Fagan
patent: 4345923 (1982-08-01), Schoen
patent: 4385911 (1983-05-01), Popeil et al.
A/S Fisker & Nielsen
Moore Chris K.
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