Liquid purification or separation – With repair or assembling means
Patent
1996-06-03
1998-06-16
Walker, W. L.
Liquid purification or separation
With repair or assembling means
210236, 210238, 21032187, 2104935, 21050023, 13762548, 137597, B01D 2708
Patent
active
057664625
DESCRIPTION:
BRIEF SUMMARY
This invention relates to water treatment apparatus and in particular to water purifier assemblies and apparatus therefore.
This invention has particular but not exclusive application to domestic water purifier assemblies and for illustrative purposes reference will be made hereinafter to such application. However it is to be understood that this invention could be used in other applications where flow diversion and/or filtration or purification is required.
Typically, domestic water purifier assemblies include a filter assembly for supplying filtered water for drinking purposes which is mounted above a kitchen sink in conjunction with the sink supply spout. Usually the purifier assembly includes an adaptor and valve assembly for connection to the sink combination and for selectively diverting flow to either the sink supply spout or the filter assembly.
One known valve assembly includes a rotary ball or plug type two-way valve. Such valves require close manufacturing tolerances for leakage prevention and accordingly are difficult to operate. They are also prone to the accumulation of mineral scale from untreated water and/or galvanic corrosion which further binds the mechanism and causes seizing.
Another known type of assembly includes a push/pull type valve wherein a cylindrical plug having piston mounted O-ring sealably slides in an in-line bore adaptor within the flow conduit to open and close an outlet port. In such assemblies the O-ring on the control piston which is moved to selectively control the flow must traverse a port in the wall of the piston chamber. This cause premature wear whereby the resultant cross leaking causes water to flow to both the sink supply spout and the filter assembly at the same time.
This type of assembly is also difficult to service because the in-line bore adaptor often seizes in position within the bore and access can be achieved only after disturbing the sealed connection between the adaptor and either the outlet spout or the filter assembly. Furthermore, repeated removal of the assembly from the combination or either the spout or the filter assembly from the assembly to allow for servicing does cause unnecessary wear and damage to the threads and seals.
This type of assembly by necessity places the push pull mechanism in-line with either the spout or the filter outlet.
As a result in some applications it places the push pull mechanism in an inaccessible or inefficient location either behind or below the adaptor.
Typically the filter assembly requires weekly servicing which requires removal of a screw-on cap utilizing a compression seal type connection. In such assemblies the cap is difficult to remove. Furthermore, repeated removal of the cap for servicing causes damage to the screw threads such that early replacement of the cap and housing is required.
The present invention aims to alleviate at least one of the above disadvantages and to provide water treatment apparatus and in particular water purifier assemblies which will be reliable and efficient in use.
With the foregoing in view, this invention in one aspect resides broadly in a water purifier assembly of the type adapted for mounting to a water supply outlet for selective dispensing of water through a general purpose outlet or a filtered outlet and including: supply outlet, an open valve chamber with a water inlet communicating with the water supply inlet and sealing lands at opposite sides of the water inlet; the other side of said inlet for sealing engagement with a respective said sealing land, and means and outwardly of said sealing lands and respectively communicating with the general purpose outlet and said feed inlet.
This invention in another aspect resides broadly in a valve assembly including: supply inlet and sealing lands at opposite sides of the water inlet; the other side of said inlet for sealing engagement with a respective said sealing land, and means and outwardly of said sealing lands.
Preferably the valve chamber has cylindrical end portions coaxial with said sealing lands and said outlets e
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Patent Abstracts of Japan, C-1247, p. 12, JP, A, 6-154739 (Hitachi LTD) 3 Jun. 1994.
Golview Pty Ltd
Walker W. L.
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