Source: http://www.freshpatents.com/-dt20091126ptan20090289000.php
Timestamp: 2013-06-19 17:05:37
Document Index: 2509931

Matched Legal Cases: ['arts 50', 'arts 50', 'arts 50', 'arts 50', 'art 50', 'art 51', 'art 51', 'art 52', 'art 50', 'art 50', 'art 50', 'art 50', 'art 41', 'art 50', 'art 50', 'art 41', 'art 41']

Water Purification Filter Assembly 4 views for this patent on FreshPatents.comupdated 06/14/13
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Water purification filter assembly Abstract: Disclosed herein is a filter assembly for water purifiers. The filter assembly includes a head having an inlet duct, a control valve, and an outlet duct. A circular cap is provided on the lower portion of the head, and has cylindrical space. A filter cap is mounted to the circular cap. A filter cartridge has a filtering part which is provided with a filter to purify water. A plurality of fastening holes is formed in the outer circumference of the circular cap, and has a step. Locking parts are disposed in the fastening holes to lock the filter cartridge. An elastic member surrounds the circular cap and the outer surfaces of the supports parts, thus elastically supporting the locking parts to the fastening holes. The filter cap has on the outer circumference of the upper portion thereof a plurality of fastening holes into which the locking parts are fitted. ...
USPTO Applicaton #: #20090289000 - Class: 210137 (USPTO) - 11/26/09 - Class 210 Related Terms: Water Purification Water Purification Filter The Patent Description & Claims data below is from USPTO Patent Application 20090289000, Water purification filter assembly.
22a: step
41a: friction holes
52a: inclined surface
DETAILED DESCRIPTION OF THE INVENTION Hereinafter, a filter assembly for water purifiers, according to the preferred embodiment of the present invention, will be described with reference to the accompanying drawings. For ease and convenience of description, the thickness of lines and the size of components in the drawings may be exaggerated. Further, the terms used herein are defined in consideration of the function of this invention, and maybe varied according to the user\'s intention. Therefore, the terms should be defined based on the overall contents of the invention.
As shown in the drawings, a filter assembly for water purifiers, according to an embodiment of the present invention, includes a head 10 which has an inlet duct 11, a control valve 13, and an outlet duct 12, a circular cap 20 which is provided on the lower portion of the head 10, a filter cap 30 which is mounted to the circular cap 20, a filter cartridge 40 which is coupled to the filter cap 30, a plurality of fastening holes 22 which are formed in the outer circumference of the circular cap 20 and each have a step 22a, locking parts 50 which are disposed in the corresponding fastening holes 22 to lock the filter cartridge 40, and an elastic member 60 which is provided to surround the circular cap 20 and the outer surfaces of the supports parts 50, thus elastically supporting the locking parts 50 to the corresponding fastening holes 22. The filter cap 30 has on the outer circumference of the upper portion thereof a plurality of fastening holes 33 into which the locking parts 50 are fitted.
Further, the circular cap 20 functions to support the filter cap 30 coupled to the filter cartridge 30, and is provided on the lower portion of the head 10. A cylindrical space 21 is defined in the circular cap 20 and is connected to the control valve 13 and the outlet duct 12. The plurality of fastening holes 22 each having the step 22a is formed in the outer circumference of the circular cap 20.
In this case, each locking part 50 has, on an end thereof, a stop part 51 which is stopped by the step 22a of the corresponding fastening hole 22. A body 52 extends from the surface of the stop part 51. When the body 52 passes through each fastening hole 22 of the circular cap 20 and is fitted into the corresponding fastening hole 33 of the filter cap 30, the filter cap 30 is firmly secured to the cylindrical space 21 of the circular cap 20.
At this time, a curved inclined surface 52a is provided on one side of each body 52, so that the body 52 is fitted into the corresponding fastening hole 33 of the filter cap 30 without interference occurring between the upper end of the filter cap 30 inserted into the circular space 21 and the body 52. Meanwhile, by rotating the filter cap 30, each body 52 is removed from an associated fastening hole 33.
That is, as shown in the drawings, the curved inclined surface 52a is provided on the surface of each body 52 in such a way as to extend obliquely from the left side of the upper end thereof. Thus, the filter cap 30 is fitted into the cylindrical space 21 without interference from a corresponding body 52. Simultaneously, each fastening hole 33 is secured to a corresponding body 52. Further, when one desires to remove the filter cap 30 from the circular cap 20, the filter cap 30 is rotated. At this time, the outer circumference of the upper end of the filter cap 30 rotates along the inclined surface 52a of each locking part 52, thus preventing the body 52 from being locked to the inner surface of each fastening hole 33. Each body 52 is removed from the corresponding fastening hole 33. By downwardly moving the filter cap 30, the filter cap 30 can be easily removed from the circular cap 20.
The drawings show one example of the body 52, which has on one side thereof the curved inclined surface 52a. This is only a preferred embodiment, but the invention is not limited to this embodiment. That is, each body 52 may have on one end thereof a protrusion having the shape of a water drop so that the body 52 is fitted into the corresponding fastening hole 33 of the filter cap 30 without interfering with the upper surface of the filter cap 30, and the body 52 is not locked to the fastening hole 33 when the filter cap 30 rotates. Such a body structure allows the filter cap 30 to rotate in opposite directions to thus be removed from the circular cap 20.
That is, when a user desires to separate the filter cartridge 40 from the circular cap 20, he or she grasps the filter cartridge 40 and rotates the filter cartridge 40 in one direction. At this time, the outer circumference of the filter cap 30 rotates along the inclined surface 52a of each locking part 50, and the filter cap 30 pushes each locking part 50 outwards. Since each locking part 50 is restricted by the elastic member 60, the locking part 50 continues to press the outer circumference of the filter cap 30 without being removed from the corresponding fastening hole 22. In such a state, when the filter cartridge 40 is moved downwards, the filter cap 30 coupled to the filter cartridge 40 is separated from the circular cap 20, and thus it is possible to replace the filter cartridge 40 with a new one.
Since the step 22a is provided on each fastening hole 22, the stop part 41 of each locking part 50 is supported to the step 22a. Thereby, each locking part 50 can be maintained in the corresponding fastening hole 22.
Further, a filter 42 is provided in the filtering part 41 to purify water. A plurality friction holes 41 a is formed in the outside of the lower surface of the filtering part 41 and facilitates the rotation of the filter cartridge 40. That is, the friction holes 41a function to prevent the filter cartridge 40 from slipping out of a user\'s hand when he or she grasps and rotates the filter cartridge 40. The user grasps the friction holes 41a and rotates the filter cartridge 41 without slipping, and thus the fastening holes 33 are removed from the bodies 52. Thereafter, the filter cartridge 40 is moved downwards. In this way, the filter cartridge 40 equipped with the filter cap 30 can be conveniently separated from the circular cap 20.
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