GB2458989A

GB2458989A - A joint for one of a water inlet or water outlet of a filter cylinder or a filter casing

Info

Publication number: GB2458989A
Application number: GB0806364A
Authority: GB
Inventors: Mao-Chang Lin
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-04-08
Filing date: 2008-04-08
Publication date: 2009-10-14
Also published as: GB0806364D0

Abstract

A joint for one of a water inlet or water outlet of a filter cylinder or a filter casing comprises a round cylindrical tube (6), at least one first waterproof washer (60) installed near one end of the round cylindrical tube (6); an outer thread on an outer surface of the round cylindrical tube (6) and behind the waterproof washer (60); an opening remote from the washer (60) is a round opening (63) and an interior of the round cylindrical tube (6) is formed as a polygonal hole (62); one end of a T shape sleeve (31) has a plurality of tapered claws (311) and a waterproof washer (4) encloses the end of the T shape sleeve (31) so as to be expanded by the tapered claws (311) and a water tube (3).

Description

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JOINT FOR A WATER INLET OR WATER OUTLET OF A

FILTER CYLINDER OR A FILTER CASING

The present invention relates to joints, and in particular to a joint for one of a water inlet or water outlet of a filter cylinder or a filter casing, wherein the joint can be installed rapidly in a prepared water inlet or water outlet of a filter cylinder or filter casing. The joint offers the functions of quick combination with a water inlet or water outlet of a filter cylinder or filter casing and receiving water quickly.

A water filter comprises a filter cylinder installed with a filter material and a filer casing screwed on the filter cylinder. Alternatively a water filter is formed by a filter material installed in a sealed container. Water flows into the water filter from the filter casing or a water inlet of the sealed container, and flows through the filter material of the filter cylinder or the sealed container. Then water is drained out from a water outlet of the filter casing or the sealed container to be used. Both the water inlet and water outlet of the filter casing or the sealed container are installed separately in a joint for connecting with a water tube conveniently. Therefore, regardless of whether a removable filter material of the filter cylinder or a non-removable filter material of the sealed container is utilised, the water inlet or water outlet has to be installed. Besides, the joint is also necessary for the water inlet or water outlet in order to install a water tube conveniently.

Three ways are used in the prior art joint connecting with a water inlet or water outlet of a water filter, which are described in the following: -Referring to Figs. I and 2, the first prior art arrangement is a screw connection method in that a joint is connected with a water filter. The inner threads 100, 110 are separately formed on the inner diameters of a water inlet 10 or a water outlet 11 of a filter casing I or a sealed container; and outer threads 20, 21 are formed on the outer sides of two axial ends of the front side and the back side of a joint 2, and then the back end of the joint 2 is screwed with a screw nut 22 by using the same thread pitch. Furthermore, the screw nut 22 is engaged with the outer thread 21. After a T shape sleeve 30 is assembled to a water tube 3 by the T shape sleeve 30 being inserted into one end of the water tube 3, a screwing effect of the screw nut 22 which is screwed into the joint 2 facilitates the water tube 3 to be assembled to the inner hole of the joint 2 so as to offer a function of connecting another water filter or water inlet and outlet. However, the traditional screw connection method has not only complicated components, but also has a disadvantage of increasing the manufacturing procedure. For more detail, because several layers of waterproof tapes 200, 210 must be covered on each outer thread of each screw connecting position, in order to increase the tightness between the inner thread and the outer thread, the manufacturing procedure becomes more complicated and requires much time and work. In addition, the T shape sleeve 30 installed into the water tube 3 may become loose so as to induce a problem of leaking water. Thus, the manufacture cost cannot be reduced greatly, and in operation, the manufacture process is inconvenient and slow in assembly.

In a further prior art, inner threads 100, 110 are separately formed on a water inlet 10 or a water outlet 11 of a filter casing 1 or a sealed container. The front and the external side of a joint 2 is formed with an outer thread 23, and the back side of the joint 2 is formed with a polygonal shape 24. By the same thread pitch and the same external diameter of an inner thread and an outer thread, the water inlet 10 and the water outlet 11 can be screwed into one end of the joint 2. Then a T shape sleeve 31 is assembled to the outer side of a water tube 3, and at the same time, a waterproof washer 4 is inserted into the inner hole of the joint 2. The front and the external side of the T shape sleeve 3 1 are formed with a plurality of tapered claws 3 10 and a plurality of slits 311 which are axially arranged, so that the front end of the T shape sleeve 3 1 is elastic to be inserted easily into the outer side of the water tube 3. Then the waterproof washer 4, the T shape sleeve 31 and the water tube 3 are inserted into the inner hole of the joint 2. Finally the raised claws 310 which are on the front and outer side of the T shape sleeve 31 are wedged in the joint 2, so that the assembly of the water inlet 10 and water outlet 11 of the sealed container or the filter casing 1 with the water tube 3 is complete, as illustrated in Figs. 3 and 4. Although the second prior art used in assembling a water tube may have an advantage of rapid assembly, the prior art still has several disadvantages. For more detail, because several layers of waterproof tapes 200, 210 must be covered on each outer thread of each screw connecting position, in order to increase the tightness between the inner thread and the outer thread, the manufacturing procedure becomes more complicated and requires much time and work. In addition, the polygonal shape 24 protrudes out of the the sealed container and the filter casing. As a result, it is easily damaged.

In another prior art, a waterproof washer 4 is installed directly in a water inlet or water outlet of a filter cylinder or filter casing, then a sleeve 5 is pushed into the water inlet or water outlet of filter cylinder or filter casing in force. A C shaped clip 50 is clipped on the sleeve 5, the periphery of the C shape clip being formed with a plurality of metal elastomers 500. Because each metal elastomer500 leans in the same direction, the sleeve 5 can be pushed easily into the water inlet or water outlet 11 of the filter cylinder or filter casing 1. AT shape sleeve 31 is sleeved on the outer side of a water tube 3. The T shape sleeve 31 has the same features of the structure as mentioned above.

The front 1 outer wall of the T shape sleeve 31 has a plurality of axially arranged claws 311 and a plurality of slits 310. The front end of the T shape sleeve 31 is elastic and thus it can be inserted easily into the exterior of the water tube 3. Then the waterproof washer 4, the T shape sleeve 31 and the water tube 3 are inserted into the sleeve 5. Finally, the claws are in the front end and exterior of the T shape sleeve 31 are locked to the sleeve 5, so that the assembly of the water inlet 10 and water outlet Ii of the sealed container or the filter casing 1 with the water tube 3 is completed as illustrated in Figs. 5 and 6.

The method has a simple structure, but a plurality of metal elastomers 500 must be arranged on the sleeve 5. Besides, each metal elastomer leans in the same direction in order to reach desirable goals.

Otherwise, it is not possible to install the water tube 3 into the water inlet 10 or water outlet 11 of the filter cylinder or filter casing 1. In addition, since the sleeve 5 must be pushed to enter into the water inlet 10 or water outlet 11 of the filter cylinder or filter casing 1 with force, the inner walls of the water inlet 1 0 or water outlet 11 of the filter cylinder or filter casing 1 are easily damaged by a of great pushing force. Damaged inner walls of the water inlet 10 or water outlet 11 of the filter cylinder or filter casing 1 will reduce the assembly of the water tube 3. Thus, it is possible that the sleeve 5 will explode in the event of high water pressure.

The present invention is modified for improving the disadvantages of the prior art water inlet or water outlet of the filter cylinder, which is based on the manufacture experiences of several decades to follow the principles of economy and efficiency. In assembly, the waterproof washer encloses a front end of the T shape sleeve, and then the T shape sleeve with the waterproof washer is placed into the polygonal hole from the round opening; and then the water tube is placed in the T shape sleeve with a part of the water tube protruding out, and then the joint is installed into a water inlet or water outlet of a sealed container or filter casing. The joint used in one of a water inlet or water outlet of a filter cylinder has several advantages, such as convenient operation, quick combination and high pressure-tolerance.

Accordingly, the primary aim of the present invention is to provide a joint used in one of a water inlet or water outlet of a filter cylinder, or a water inlet or a water outlet of a filter casing. The joint can be assembled rapidly on a water inlet or a water outlet of a filter cylinder or a filter casing so as to reach the goals of convenient operation, quick combination and high pressure-tolerance.

According to the present invention, there is provided a joint for a water inlet or water outlet of a filter cylinder or a filter casing; the joint being a round cylindrical tube, comprising: at least one first waterproof washer installed near one end of the round cylindrical tube; an outer thread on an outer surface of the round cylindrical tube and behind the waterproof washer; an outer diameter of the outer thread being matched to inner threads of the water inlet or water outlet of the filter cylinder or filter casing so that the round cylindrical tube can be screwed into the water inlet or water outlet of the filter cylinder or filter casing so as to be matched to the periphery of the filter cylinder or filter casing; an opening at a location remote from the washer being a round opening and an interior of the round cylindrical tube being formed as a polygonal hole; a front end of a T shape sleeve having a plurality of tapered claws which are axially arranged so that the T shape sleeve is elastic; the waterproof washer 4 enclosing one end of the T shape sleeve so as to be expanded by the tapered claws; the waterproof washer comprising a circular ring having an approximate-rectangular cross section; the angle of each of three corners of the approximate-rectangular cross section of the ring being degrees and the radially inner and outer surfaces of the ring being smooth; and a water tube; wherein, in assembly, the waterproof washer encloses a front end of the T shape sleeve, the T shape sleeve with the waterproof washer is placed into the polygonal hole from the round opening and then the water tube is placed in the T shape sleeve with a part of the water tube g protruding out.

The invention will be more readily understood from the following detailed description when read in conjunction with the drawings, in which:-Fig. 1 is an exploded perspective view of the water inlet or water outlet of a filter cylinder or filter casing and the joint of the first prior art; Fig. 2 is a vertical cross sectional view of the water inlet or water outlet of the filter cylinder or filter casing and the joint of the first

prior art;

Fig. 3 is an exploded perspective view of the water inlet or water outlet of a filter cylinder or filter casing and the joint of the second

prior art;

Fig. 4 is a vertical cross sectional view of the water inlet or water outlet of the filter cylinder or filter casing and the joint of the second

prior art;

Fig. 5 is an exploded perspective view of the water inlet or water outlet of a filter cylinder or filter casing and the joint of the third

prior art;

Fig. 6 is a vertical cross sectional view of the water inlet or water outlet of the filter cylinder or filter casing and the joint of the third

prior art;

Fig. 7 is an exploded perspective view of the water inlet or water outlet of a filter cylinder or filter casing and the joint of the present invention; Fig.8 is a vertical cross sectional view of the water inlet or water outlet of the filter cylinder or filter casing and the joint of the present invention; Fig.9 is a part cut-away perspective view of a waterproof washer of the present invention; Fig. 10 is an exploded perspective view of the water inlet or water outlet of a filter cylinder or filter casing and the joint of the present invention showing that the round cylindrical tube of the present invention is designed to be bent at a certain included angle; and Fig. 11 is a vertical cross sectional view showing how the bent cylindrical tube at a certain included angle is screwed into the water inlet or water outlet of a filter cylinder or filter casing.

In the drawings, like parts are denoted by like reference numerals.

Referring to Figs. 7 and 8, the joint according to the invention comprises a round cylindrical tube 6; at least one first waterproof washer 60 installed near one end of the round cylindrical tube 6; an outer thread 61 on an outer surface of the round cylindrical tube 6 and behind the waterproof washer 60; a second waterproof washer 4, a T shape sleeve 31 with T shape lateral sides; and a water tube 3.

The outer diameter of the outer thread 61 is matched to the size of inner threads 100, 110 of a water inlet 10 or water outlet 11 of the filter cylinder or filter casing 1. The end of the round cylindrical tube 6 remote from the washer 60 has a round opening 63 and an interior of the round cylindrical tube 6 is formed as a polygonal hole 62. The round cylindrical tube 6 can be screwed into the water inlet 10 or water outlet 11 of the filter cylinder or filter casing 1 so as to be matched to the periphery of the filter cylinder or filter cover. The waterproof washer 4 encloses one end of the T shape sleeve 31 and the T shape sleeve 31 and the waterproof washer 4 are placed into the polygonal hole 62 from the round opening 63. Then the water tube 3 is placed in the T shape sleeve 31 with part of the water tube 3 protruding out.

In the present invention, a front end of the I shape sleeve 31 has a plurality of tapered claws 3 11 which are axially arranged so that the T shape sleeve 3 1 is elastic. The waterproof washer 4 encloses the front end of the T shape sleeve 3 1 so as to be expanded by the tapered claws 311. Thereby the round cylindrical tube 6 has a preferred waterproof effect.

The waterproof washer 4 has an approximate-rectangular cross section as illustrated in Fig. 9, The angle of each of three corners 40 of the approximate-rectangular cross section of the waterproof washer 4 is 90 degrees and the other corner 41 is a convex round edge. The radially inner and outer surfaces 42 of the waterproof washer 4 are smooth.

Referring to Figs 8 and 11, when the waterproof washer 4 is applied to a round opening 63 of a round cylindrical tube 6 of a filter or a filter cover or to a water tube 3, and the present invention is used to seal a filter 1, the waterproof washer 4 is placed at the round opening 63 of the round cylindrical tube 6. The convex cambered corner 41 of the washer 4 is placed at a side far away from the round opening 63 so that a water tube 3 can be placed at the side having a round corner smoothly and resists against the round opening 63 of the present invention tightly. The radially outer corners 40 of the washer 4 having 90 degree sides engage against an inner side of the round cylindrical tube 6. Thus, water within the filter will not drain out.

When the round cylindrical tube (6) is designed to be bent at a certain included angle as indicated in Fig. 10-11, since there is a handle available to turn it, the polygonal hole can be modified into a round hole like the round opening (63).

Other than being screwed into the water inlet 10 or water outlet 11 of the filter cylinder or filter casing 1, the round cylindrical tube 6 of the present invention is tightly engaged with the water inlet 10 or water outlet 11 of the filter cylinder or filter casing 1 by the waterproof washer 60 to tightly engage the inner walls of the water inlet 1 0 or water outlet 11 and the screwing effect of the outer thread 61 and inner thread 100 is achieved. Thus, the assembly work can be positioned easily and rapidly to have the effect of waterproof and high pressure-tolerance.

Therefore, a joint according to the invention can be installed quickly and conveniently in one of a water inlet or water outlet of a filter cylinder or a filter casing. Other than having several advantages, t such as easy composition, low cost, quick combination, convenient operation and receiving water quickly, the joint can tolerate high water pressures by the screwing effect of the outer thread and inner thread.

The present invention is thus described but it will be clear that the same may be varied in many ways. Such variations are not to be regarded as a departure from the scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the invention set forth in the following claims.

Claims

CLAIMS1. A joint for a water inlet or water outlet of a filter cylinder or a filter casing; the joint being a round cylindrical tube, comprising: at least one first waterproof washer installed near one end of the round cylindrical tube; an outer thread on an outer surface of the round cylindrical tube and behind the waterproof washer; an outer diameter of the outer thread being matched to inner threads of the water inlet or water outlet of the filter cylinder or filter casing so that the round cylindrical tube can be screwed into the water inlet or water outlet of the filter cylinder or filter casing so as to be matched to the periphery of the filter cylinder or filter casing; an opening at a location remote from the washer being a round opening and an interior of the round cylindrical tube being formed as a polygonal hole; a front end of a T shape sleeve having a plurality of tapered claws which are axially arranged so that the T shape sleeve is elastic; the waterproof washer 4 enclosing one end of the T shape sleeve so as to be expanded by the tapered claws; the waterproof washer comprising a circular ring having an approximate-rectangular cross section; the angle of each of three corners of the approximate-rectangular cross section of the ring being degrees and the radially inner and outer surfaces of the ring being smooth; and a water tube; wherein, in assembly, the waterproof washer encloses a front end of the T shape sleeve, the T shape sleeve with the waterproof washer is placed into the polygonal hole from the round opening and then the water tube is placed in the T shape sleeve with a part of the water tube protruding out.
2. A joint according to claim 1, wherein the round cylindrical tube is formed as a bent cylindrical tube at a certain included angle, the polygonal hole is changed to a round hole, and the round cylindrical tube is screwed into the water inlet or water outlet of the filter cylinder or filter casing by using the bent cylindrical tube extending beyond the water inlet or water outlet of filter cylinder or filter casing as a handle.
3. A joint for a water inlet or water outlet of a filter cylinder or a filter casing, said joint being substantially as described herein with reference to the drawings.