Liquid circuit

Liquid purification or separation – Automatic control – Thermal

Reexamination Certificate

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Details

C210S195100, C210S257100, C210S171000

Reexamination Certificate

active

10328173

ABSTRACT:
A circuit for filtering a liquid, comprising a storage vessel (10), a pump (17), a consumer device (14), a filter element (23) and a controller (24). The circuit maybe used in systems where liquid, e.g. water, oil or fuel, is filtered and at least part thereof is returned to the storage vessel. Liquid is pumped in the circuit from the storage vessel by the pump through lines (11, 13, 15, 16), filtered by filter (23) and supplied to the consumer device. Excess liquid not required by the consumer device (14) is returned via return line (15) to the controller (24) which directs the liquid either to the filter or the storage vessel—depending on liquid temperature. The controller (24) and the filter are arranged in a common housing (18) having connectors for an unfiltered liquid inlet (19), a filtered liquid outlet (20), a liquid return (21) and a liquid outlet (22). The connectors (19–22) enable rapid assembly of the circuit.

REFERENCES:
patent: 4502451 (1985-03-01), Duprez
patent: 5263456 (1993-11-01), Owen-Evans
patent: 5887573 (1999-03-01), Janik et al.
patent: 5958225 (1999-09-01), Bradford
patent: 6189513 (2001-02-01), Brown et al.
patent: 6361684 (2002-03-01), Hawkins et al.
patent: 19714488 (1998-09-01), None
patent: 19926172 (2000-12-01), None
patent: 0833050 (1998-04-01), None
patent: 0984157 (2000-03-01), None
patent: 1058000 (2000-12-01), None
patent: 0887542 (2001-08-01), None
patent: 0819458 (2002-11-01), None
International Search Report Oct. 23, 2001.

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