IL43420A - Pipe connector - Google Patents

Description

A pipe The Is Haim This invention relates to a pipe connector particularly concerned with a connector designed flexible pipes for example of a flexible plastics material and by means of such a pipe can be effectively coupled to another pipe or to a relatively rigid element such as a spigot or the In one known form of connector such for disclosed in Israel Patent Specification Serial 11149 and 26692 the connector includes a rigid tubular an wall of which is with an annular gripping surface which tapers from a adjacent the mouth of the housin and having a diameter greater than that of the pipe to be coupled to a narrowest end remote from the mouth of the housing and having a diameter less than that of the pipe to be With such a conneotor the pipe is inserted therein through the wide diameter end thereof and is pushed into the narrow diameter end With the flow of liquid under pressure through the pipe the pipe walls are pressed against the gripping and where the latter is formed these bite into the walls thereby effectively preventing the removal of the pipe from the In practice it is found with such a it on the one hand difficult to force the pipe the narrow diameter end portion thereof on the other once pipe has been introduced into the narrow diameter end portion and the serrations have bitten into the it practically impossible to remove the pipe from connector when this may be required for servicing or the like In with connectors of this an effective seal sometimes occurs between the gripping surface and the the Furthermore with ageing of the pipe and the a process which particularly accentuated difficult climatic the consequent wear may result in ineffective gripping not to mention and a of the pipe can even In accordance with a different form of known connector such as for example disclosed Israel Patent Specification Serial 35487 and British Patent Specification Serial the connector comprises a tubular housing having an axial bore within which one end of the pipe to be oonneoted can A tubular sleeve is adapted to be screw coupled to the housing and to surround the pipe so as to sandwich between an Inner tapering wall the sleeve and the pipe sur ce an annular rin formed of a resilient This sleeve has a longitudinal outer surface of the ring being tapered so as to conform with the tapering of inner surface of the sleeve and the surface of the ring being With such a when the sleeve is fully screwed onto the housing the ring forced into a contracted condition in which its internal diameter is less than that of the pipe be On the other hand with the ring in the uncontracted or expanded which can adopt when the sleeve has not been fully screwed onto the the internal diameter of the ring can be equal to or than the external diameter the pipe to be and a known connector of this the pipe to be coupled is into the connector with the sleeve being at least partially uncoupled respect to the housing the ring therefore in the expanded With the pipe introduced into the the sleeve is then screwed home osition the ri to the the of the of the ring into the pipe thereby preventing drawal of the pipe from the If now it is desired to uncouple the pipe from the known connector of this the sleeve is unscrewed from the housing thereby allowing the ring to be from the pipe and the to be removed from the with connectors of this known kind the seal between the pipe and the connector is provided by means of an sealing rin or gasket which is maintained in a fixed position in the connector and through which the pipe is forced when introduced into the Whilst connectors of this second type have the advantage over connectors of the first type in that their constituent portions can allowing the removal of the pipe from the they nevertheless the disadvantage as compared with connectors of the first in that the coupling of the pipe to the connector cannot be effected by a simple insertion of the pipe into the connector but requires both the insertion and the subsequent screw coupling of the connector sleeve to the connector This additional requirement may be time consuming the tedious and because of carelessness or any other the sleeve is not screwed home onto the a defective coupling of the pipe to the connector ensues with all the risks and losses involved and as with known connectors of the first type ageing leads to a progressive deterioration of Additionally however this ageing also affects the fixed annular sealing ring or gasket resulting in a re It is an objec of the present to provide i a new and improved connector for pipes or the like in which the above referred to disadvantages are substantially avoided or under the influence f fluid With the element in accordance with prior proposal once ring member has been forced into gripping the pipe by biting into no are foreshadowed for the release the pipe from the This is completely overcome in accordance the present Here where i is desired to detach the pipe from the the sleeve need merely be unscrewed from the housing member and the ring member can then be fully screwed to the housing the connector is nevertheless ready fo immediate coupling of the thereto and this coupling effected as a result of a mere insertion of th pipe into the connector being effected automatically as a result of liquid under By virtue of the fact that both the sealing member and the ring member are both independently slidable in the sleeve any of the grip of the ring member on pipe or of the of sealing ring as a result of the ageing o deterioration these components is immediately corrected for by o both of these components being further under the liquid into the narrower end of the sleeve where both the firm grip and effective seal are One embodiment of a connector in accordance with the present Invention will now be described by way of example with reference to accompanying drawings in 1 is a partially sectioned longitudinal elevation of the connector showing the introduction of a pipe and 2 is a similar view of the connector showing the gripping of the pipe by the As seen in the th connector comprises a tubular housing 1 formed at either with an externally peripheral flange 2 havin formed therein a peripheral recess 3 whioh accommodates an An abutment rib 5 is formed integrally with and extends inwardly from a central portion of the inner wall of the connector A pair of tubular sleeves 6 are Each sleeve 6 comprises a conical tapering portion 7 and an internally threaded annular end portion 8 the outer surface of the annular end portion 8 being formed with the ribs so as to facilitate easier gripping of the sleeve Each sleeve 6 is screwed onto the housing 1 and its sleeve is fully screwed the sealing ring 4 is sealingly sandwiched within the recess 3 and against a corresponding shoulder 10 formed in the narrow end 11 of the sleeve 6 is formed with an inwardly directed flange 8 A resilient gripping 13 is with an 8a now water or other liquid under pressure through the coupled together pipes 18 and the the fluid pressure acts on the sealing ring 17 and forces together with the juxtaposed gripping ring 13 into the narrower end of the sleeve 6 in which position the ring contracts so as to the pipe whilst the sealing ring 1V is compressed so as to effect a firm seal between the pipe and the luid pressure in the acts radially outwardly forcing the walls of the pipe against the serrations of the ring as shown 2 of the bite into the pipe thereby firmly grippin In this way the pipe is firmly and sealingly coupled to the connector without there being any necessity for manipulating the connector which remains exactly the same condition before and after Thus all that is required to effect coupling of the pipe to the connector the simple insertion of the pipe into the On the other when it desired to uncouple the pipe from the for whatever the sleeve 6 can be readily unscrewed from the housing and the split gripping ring can be readily detached om the pipe It can be readily see from 2 of the drawings that in the coupled state deterioratio of the connector due fo example to ageing results in a loosening o the grip of the 13 of the seal effected by the sealin ring the liquid pressure is effective in pushing these components into the narrower end the sleeve 6 and the resulting increased contraction of these components reestablishes an grip In this and as contrasted known connectors discussed the connector described is provided with adjusting characteristics whic automatically compensate for the effeots of It will be readily appreciated that whilst the 10 equally applicable where the connector is designed to be coupled for example to a spigot or faucet or the Similarly the invention is applicable to the coupling together more than two whilst in the specific example described above the gripping ring is formed with serrations designed to grip the pipe the ring can be provided with other forms of gripping for the ring can be provided with a frictional surface designed frictionally to grip the pipe or the ring can be provided with a single continuous or discontinuous serration capable of gripping the The connectors in accordance with the invention can suitably plastics material though other materials such for metallic materials can equally be 11 insufficientOCRQuality

Claims (5)

1. A connector for a pipe comprising a) a tabular housing having a peripheral, externally threaded portion; b) a tubular sleeve, at least the inner surface of which tapers from a wide end portion to an opposite narrow end portion, said wide end portion being formed with a peripheral, internally threaded portion for screwing on to said housing; c) a ring member slidable in said sleeve having an outer tapering surface which is formed with an axial slit and having an inner gripping surface and d) a sealing ring slidable i said sleeve from and to a position adjacent the wide end thereof in which position it is adapted sealingly to contact the sleeve and the pipe, the arrangement being such that, with said housing and sleeve fully screw coupled together and with said sealing ring interposed betwee the wider end of the ring member and an adjacent end of the housing said pip is easily insertable into said connector through said sleeve, ring member and sealing ring, said ring member being slidable from an expanded position adjacent the wide end Of the slee* e wherein its internal diameter is or can be expanded to be at least equal to that of the pipe to be coupled to a contracted position adjacent the narrower end where its internal diameter is less han that of the pipe to be coupled.

2. A connector according to Claim 1, herein said ring member is formed with at least one peripheral, inwardly directed serration.

3. A connector according to Claim 1, wherein sail, ring member is formed with a plurality of axially spaced apart, peripheral, inwardly directed serrations.

4. A connector according to any one of the preceding claims wherein said sealing ring is located between said ring member and an abutting edge of said housing,.

5. ip® connector substantially as hereinbefore described by way of example and with reference to the accompanying drawings. PARTNERS IS : CB