Pipe joints or couplings – Essential catch – Leaf spring
Patent
1991-03-12
1992-09-29
Arola, Dave W.
Pipe joints or couplings
Essential catch
Leaf spring
285921, 285903, 285423, F16L 3712
Patent
active
051509300
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a connector for corrugated piping or conduit or piping having a ridge located adjacent its end and the method of forming such a connector or forming a hollow plastics article having a bore, with a recess or recesses in said article, and at least one finger positioned in said recess or recesses with a respective projection, extending into said bore and/or a recess in said finger facing the bore, and also to method of moulding a hollow object having a projection extending into the bore.
With existing corrugated flexible conduit for drainage or electrical work, available methods of joining involves encasing the joint and gluing to ensure an adequate join. This type of joint must be left, so that the glue or adhesive sets, to ensure a successful join. This takes the tradesman additional time, and the chemistry of the glue weakens the conduit and the connector cannot be reused.
The present invention seeks to ameliorate this problem by providing a push-on connector which provides a connection without the aid of adhesives, and which is reusable and adjustable during installation.
In one broad form the invention provides a one piece connector, for affixing to a conduit having at least one ridge or a recess located adjacent to its end, comprising:
a body open at one end to receive a conduit in a bore communicating with said open end;
a recess or recesses;
at least one finger formed in said recess or recesses, with a respective projection extending into said bore during use; said projection having retention means located on its face remote from said open end of said body to prevent the projection from riding out of engagement with said at least one ridge or recess when a withdrawal force is exerted on said conduit held in said connector, by causing said projection to be drawn deeper into engagement with said at least one ridge or recess.
In another form the invention comprises a one piece connector, for affixing to a conduit having at least one ridge or recess located adjacent to its end, comprising:
a body open at one end to receive a conduit in a bore communicating with said open end;
a recess or recesses;
at least one finger formed in said recess or recesses with a respective projection extending into said bore during use;
wherein said finger has a line of weakness to increase the forcing of the projection into engagement with said ridge or recess when a withdrawal force is exerted on said conduit held in said connector.
Preferably the recess or recesses are in communication with said bore.
Preferably the finger is axially extending away from the open end of the bore.
A sealing means can be provided to form a fluid tight seal between the connector and the conduit. This can be in the form of a resiliently deformable seal which is located in the bore to seal against (or adjacent the end,) of the conduit pushed into the bore, or at the open end of the bore where the recess is seated from said bore by flexible membranes joining the finger to the recess walls.
However, preferably, the sealing means is a tapered section of said bore which cooperates so as to both axially and radially compress the flexible conduit pushed into said bore.
The connector of the present invention can be utilised with any form of fittings, such as elbows, junctions, Y and T pieces, terminators, junction boxes, or fittings joining corrugated piping to rigid piping or corrugated piping to corrugated piping.
In a further form the invention comprises a method of moulding a hollow object having a bore with a recess or recesses in said article, and at least one finger positioned in said recess or recesses with a respective projection, extending into said bore and/or a recess in said finger facing the bore wherein during removal of the moulded article from the mould, the projection or projections which extend into the bore or the recesses in said finger facing into said bore are not engaged by and hence damaged by the core pin as it is withdrawn.
The recess could be a full cut-out communicating between the bore and t
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McNeil Sandy
Petty John
Aberle Timothy
Arola Dave W.
Elconnex Pty Limited
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