Filter apparatus

Liquid purification or separation – Processes – Including controlling process in response to a sensed condition

Patent

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Details

210807, 210 87, 210100, 210282, 210444, B01D 2702

Patent

active

046981640

ABSTRACT:
A filtering apparatus including a fluid monitoring head and a replaceable filter cartridge removably fastened to said head. The cartridge includes a shut off mechanism for interrupting fluid flow through the cartridge when a predetermined quantity of fluid has been treated by the filter. The fluid monitoring head is releasably coupled to the shutoff mechanism when the filter is installed. The shutoff mechanism includes a valve element threadedly carried by a shaft that forms part of a driven member, operatively connected to a drive member forming part of the monitoring head. As the driven member rotates, the valve element is gradually unthreaded until it separates and is driven to a flow interrupting position by a biasing spring. The coupling between the drive and driven members includes apertures on one of the members which are engaged by resilient tongues formed on the other member.

REFERENCES:
patent: 3349914 (1967-10-01), Kudlaty
patent: 3570520 (1971-03-01), Sodi
patent: 4145285 (1979-03-01), Martin et al.
patent: 4359384 (1982-11-01), Brane et al.
patent: 4431533 (1984-02-01), Wrede
patent: 4555331 (1985-11-01), Thornton et al.

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