Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Transparent
Patent
1991-05-17
1992-12-15
Dawson, Robert A.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Transparent
210440, 210444, 21049701, 210DIG17, 55490, 55529, B01D 2708
Patent
active
051714302
ABSTRACT:
This disclosure illustrates a replaceable filter assembly for fluids in which the filter has a shell formed from an injection molded threaded end and an integral blow molded closed end to form a unitary shell. A seal such as a flange is provided adjacent to the threaded end so that a pressure seal can be maintained. A filter medium is supported within the shell so as to direct fluid flow through it to remove contaminants. The shell can be formed from plastic materials such as polyester terephthalate (PET), polyether sulfone (PES), and polyether urethane (PEU). This construction enables an inexpensive filter assembly and, with transparent plastic materials, an indication of the contaminant removal activity within the filter.
REFERENCES:
patent: 4021342 (1977-05-01), Schacht et al.
patent: 4312751 (1982-01-01), Casamigana
patent: 4770768 (1988-09-01), Lang
patent: 4859328 (1989-08-01), Goroezinger et al.
patent: 4992166 (1991-02-01), Lowsky et al.
patent: 5026478 (1991-06-01), Tanabe et al.
Beach Donald W.
Feldhaus Lawrence B.
Holzhausen Udo E.
Langford William F.
Matheson Charles L.
Dawson Robert A.
Fleetguard Inc.
Gron Gary M.
Millard W. L.
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