Abstract A joint between tubular plastic articles and a method of forming same, wherein a first tubular article has a socket in one end thereof with an outer portion and a reduced inner portion, and an injection hole is provided in the first article and extends into the outer socket portion. The end portion of the second article is positioned in the socket in slidable engagement with the inner socket portion, the end portion of the second article having an outer diameter that is less than the diameter of the outer socket portion so as to define an annular space therebetween in communication with the injection hole. An annular sealing member having a vent hole therethrough is positioned in engagement with the one end of the first article and the adjacent portion of the second article to seal the annular space between the articles, the vent hole being circumferentially spaced from the injection hole. Thereafter, a substantially nonshrink liquid adhesive curable to a solid is injected through the injection hole to fill the annular space and form a leak-proof joint between the first and second articles.
IN A METHOD OF JOINING PLASTIC TUBULAR ARTICLES WHEREIN A FIRST TUBULAR HAS A SOCKET IN ONE END THEREOF, SAID SOCKET HAVING AN OUTER PORTION AND A REDUCED INNER PORTION, AND INJECTION HOLE IS PROVIDE IN SAID FIRST ARTICLE AND EXTENTS INTO SAID OUTER SOCKET PORTION, AND THE END PORTION OF A SECOND ARTICLES IS POSITIONED IN SUCH SOCKET IN SLIDABLE ENGAGEMENT WITH THE INNER SOCKET PORTION, THE END PORTION OF THE SECOND ARTICLE HAVING AN OUTER DIAMETER THAT IS LESS THAN THE DIAMETER OF SAID OUTER SOCKET PORTION SO AS TO DEFINE AN ANNULAR SPACE THEREBETWEEN IN COMMUNICATION WITH SAID INJECTION HOLE; THE IMPROVEMENT COMPRISING: POSITIONING AN ANNULAR SEALING MEMBER IN AXIAL ABUTTING CONTACT AGAINST SAID ONE END FACE OF THE FIRST ARTICLE AND IN CONTACT WITH THE ADJACENT PORTION OF TH SECOND ARTICLE TO SEAL SAID ANNULAR SPACE BETWEEN SAID ARTICLES SAID SEALING MEMBER HAVING A SINGLE, OPEN VENT HOLE THERETHROUGH IN COMMUNICATION WITH SAID ANNULAR SPACE, AND SPACING SAID SINGLE VENT HOLE IN CIRCUMFERENTIALLY AT AN ANGLE APPROXIMATELY 180* FROM SAID INJECTION HOLE, AND INJECTING A SUBSTANTIALLY NONSHRINK LIQUID ADHESIVE CURABLE TO A SOLID THROUGH SAID INJECTION HOLE TO FILL SAID ANNULAR SPACE AND FORM A LEAK-PROOF JOINT BETWEEN SAID FIRST AND SECOND ARTICLES, SAID VENT HOLE VENTING AIR FROM THE ANNULAR SPACE AS THE ADHESIVE IN INJECTED THEREIN.
Claim 2
Dependent Claim
222 words
IN A METHOD OF JOINING PLASTIC TUBULAR ARTICLES WHEREIN A FIRST TUBULAR HAS A SOCKET IN ONE END THEREOF, SAID SOCKET HAVING AN OUTER PORTION AND A REDUCED INNER PORTION, AND INJECTION HOLE IS PROVIDE IN SAID FIRST ARTICLE AND EXTENTS INTO SAID OUTER SOCKET PORTION, AND THE END PORTION OF A SECOND ARTICLES IS POSITIONED IN SUCH SOCKET IN SLIDABLE ENGAGEMENT WITH THE INNER SOCKET PORTION, THE END PORTION OF THE SECOND ARTICLE HAVING AN OUTER DIAMETER THAT IS LESS THAN THE DIAMETER OF SAID OUTER SOCKET PORTION SO AS TO DEFINE AN ANNULAR SPACE THEREBETWEEN IN COMMUNICATION WITH SAID INJECTION HOLE; THE IMPROVEMENT COMPRISING: POSITIONING AN ANNULAR SEALING MEMBER IN AXIAL ABUTTING CONTACT AGAINST SAID ONE END FACE OF THE FIRST ARTICLE AND IN CONTACT WITH THE ADJACENT PORTION OF TH SECOND ARTICLE TO SEAL SAID ANNULAR SPACE BETWEEN SAID ARTICLES SAID SEALING MEMBER HAVING A SINGLE, OPEN VENT HOLE THERETHROUGH IN COMMUNICATION WITH SAID ANNULAR SPACE, AND SPACING SAID SINGLE VENT HOLE IN CIRCUMFERENTIALLY AT AN ANGLE APPROXIMATELY 180* FROM SAID INJECTION HOLE, AND INJECTING A SUBSTANTIALLY NONSHRINK LIQUID ADHESIVE CURABLE TO A SOLID THROUGH SAID INJECTION HOLE TO FILL SAID ANNULAR SPACE AND FORM A LEAK-PROOF JOINT BETWEEN SAID FIRST AND SECOND ARTICLES, SAID VENT HOLE VENTING AIR FROM THE ANNULAR SPACE AS THE ADHESIVE IN INJECTED THEREIN.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein the inner socket portion is tapered inwardly in a direction away from said outer socket portion to provide for tight engagement with the end portion of said second article to prevent leakage therebetween.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said adhesive is a liquid prepolymer.
Claim 5
Dependent Claim
12 words
The method of claim 3 wherein said adhesive is an epoxy cement.