Valves and valve actuation – With correlated flow path – Pipe side
Patent
1986-10-27
1988-01-12
Chambers, A. Michael
Valves and valve actuation
With correlated flow path
Pipe side
251216, 251217, 251339, F16K 5100
Patent
active
047186364
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a branch connection, and in particular a drain branch connection in a main flexible pipe, reinforced or not, sheathed or not.
2. Description of the Prior Art
The French patent application No. 81 10769 describes a branch connection whose distal end is preferably separated from the wall of the main pipe or at most in contact therewith, so as to protect the armature of the connection and/or of the main pipe by penetration of a coating of a junction material, shaped by molding, between the branch orifice formed in the main pipe and the connection.
This connection is formed particularly when it is a question of a drain connection, by a tubular insert embedded at least partially in said coating of junction material.
Before molding this coating, a binding material is applied (by spraying or by immersion or similar) to at least the parts of the insert intended to be coated with said junction material, more particularly for promoting adherence of the coating to the insert during molding (it is a question of hot molding).
The insert cooperates with a part intended to seal the proximal end of this insert, which part is provided with means for effecting draining without completely removing the sealing part: for this, the part in question is formed by a threaded tubular plug intended to be screwed inside the previously tapped insert and its lateral wall is provided with a drain orifice formed in the upper part.
The purpose of the present invention is to provide a branch connection, and more particularly a drain branch connection which answers better the requirements of practice than the connections relating to the same purpose known heretofore, particularly: (insert) before molding, which simplifies the fitting of a drain connection.
SUMMARY OF THE INVENTION
The present invention provides a branch connection, and in particular a drain connection, for a main flexible pipe, reinforced or not, sheathed or not, of the type secured to the main pipe by coating, by molding, an appropriate junction material formed particularly by rubber or similar, and of the type having: wall of said main pipe; material and cooperating with a part intended to seal off the priximal end of this insert, and openings formed in its tubular wall so that coating with said junction material which penetrates into these openings during molding forms connection bridges between the portions of said coating which surround the insert, these connecting bridges holding said insert in position
In addition to the foregoing arrangements, the invention further comprises other arrangements which will be clear from the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood from the complement of description which follows with reference to the accompanying drawings in which:
FIG. 1 is a vertical sectional view showing the drain connection of the invention;
FIGS. 2 and 4 are top views of the tubular insert of the invention illustrated in FIG. 1, which show two particular and non-limitative arrangements of holes for penetration of the junction material used within the scope of the invention, and V--V of FIGS. 2 and 4, respectively, showing an advantageous detail relative to these penetration holes.
It should however be understood that these drawings and the corresponding descriptive parts are given solely by way of illustration of the object of the invention of which they in no wise form a limitation.
In FIG. 1, reference 3 designates a main flexible pipe, more particularly reinforced (cf. ref. 3a), in which has been provided a branch orifice 4, in correspondence with which it is desired to fit a drain branch connection.
This latter is formed by a tapped insert which is in particular, but not limitatively, in the form of a nut 1 into which is screwed the threaded central shank 2 of a plug 5 intended to seal the proximal end of nut 1 by bearing, with the lower face 6 of its operating head 7 on the upper portion 8a of the coating mater
REFERENCES:
patent: Re28844 (1976-06-01), Dehar
patent: 2824570 (1958-02-01), Silverman et al.
patent: 3104136 (1960-05-01), Merriman
patent: 3272904 (1961-01-01), Millard
patent: 4487392 (1984-11-01), Eckenrode, Jr.
Chambers A. Michael
Hutchinson
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