Pipe coupling

• US 3,920,270 A
• Filed: 10/03/1973
• Issued: 11/18/1975
• Est. Priority Date: 10/03/1973
• Status: Expired due to Term

• Current Assignee: Howard R. Babb Jr
• Original Assignee: Howard R. Babb Jr
• Inventors: Babb, Howard R. Jr.
• Primary Examiner(s): Callaghan, Thomas F.
• Application Number:
  US05/403,271
• Time in Patent Office: 776 Days
• Field of Search: 285/104,105,321,339,421,369,113,323,177,179,368,DIG.2 403/371,369
• US Class Current: 285/104
• CPC Class Codes: F16L 17/035 the sealing rings having two lips parallel to each other
• CPC Class Codes: F16L 21/022 used with sleeves or nipples for pipes of the same diameter, or with reduction pieces F16L21/025 takes precedence
• CPC Class Codes: F16L 21/08 with additional locking means F16L17/035, F16L17/04, F16L21/04, F16L21/06 take precedence; screwed joints F16L19/08; couplings of the quick-acting type F16L37/00
• CPC Class Codes: F16L 37/088 by means of a split elastic ring
• CPC Class Codes: Y10S 285/901 Cap closures

Abstract

A coupling or joint for use in connecting pipe sections, pipe fittings, and other similar hardware associated with pipe systems, comprising a sleeve member of polyvinyl chloride or similar plastic material, sealing means, and means for retaining a pipe end in said sleeve member, said retaining means comprising a metallic angularly transverse split ring. The split ring is positioned in a groove in the sleeve and by virtue of its sloping outer surface, toothed inner surface, flange, and its relationship with the groove, provides a controlled gripping action upon the pipe end being retained. Means are thus also provided for limiting movement of the retaining means relative to the sleeve, the groove and inserted pipe end. This means is provided so that the amount by which the teeth of the toothed inner surface of the split ring become embedded in the pipe end may be limited. The invention may be used in several different forms or embodiments. In particular, the grooves may be formed exteriorly of the sleeve and the retaining means positioned in such grooves may grip the interior of a pipe to be joined to or by the coupling.

Claims

1. A PIPE COUPLING COMPRISING:

A. A SLEEVE MEMBER FORMED WITH A PLURALITY OF RECTANGULAR GROOVES FORMED INTERNALLY OF THE SLEEVE MEMBER AT EACH END THEREOF AND FORMED OF POLYVINYL CHLORIDE;

B. A SEALING MEANS POSITIONED WITHIN ONE OF THE GROOVES AT EACH END OF THE SLEEVE MEMBER;

C. MEANS FOR RETAINING ENDS OF CYLINDRICAL PIPE, POSITIONED WITHIN ANOTHER OF THE RECTANGULAR ANNULAR GROOVES AT EACH END OF SAID SLEEVE MEMBER, WHICH GROOVES ARE EACH LOCATED NEARER THE PIPE ENTRANCE OF THE COUPLING THAN THE GROOVES WHICH HOUSE THE SEALING MEANS, AND THE RETAINING MEANS AT EACH END COMPRISING AN ANGULARLY TRANSVERSE SPLIT RING WHICH IS INTERNALLY TOOTHED AND HOUSED SO AS TO BE LIMITEDLY MOVABLE WITHIN THE ASSOCIATED RECTANGULAR ANNULAR GROOVE, FORMED INTERNALLY IN THE SLEEVE MEMBER, TO EMBRACE THE OUTER DIAMETER OF THE PIPE END;

THE MINIMUM DIAMETER OF EACH OF THE SPLIT RINGS BEING LESS THAN THE OUTER DIAMETER OF THE PIPE INSERTED;

MEANS IN EACH CASE FOR COACTING WITH ONE OF THE GROOVES TO CAUSE THE RING TO ALTER ITS DIAMETER, WHICH CAUSES THE RING TO CONTRACT WHEN MOVED IN ONE DIRECTION RELATIVE TO ITS RECEIVING GROOVE AND COMPRISES A SLOPED EXTERIOR SURFACE OF THE SPLIT RING MAKING A LINE CONTACT WITH THE JUNCTION BETWEEN THE OUTER RADIAL SIDE OF THE ASSOCIATED RECTANGULAR GROOVE WITH THE CYLINDRICAL WALL OF THE SLEEVE MEMBER TO CAUSE THE RING TO CONTRACT;

AND A RADIALLY EXTENDING ANNULAR EXTTERNAL FLANGE FORMED ON THE SPLIT RING ADJACENT TO THE SLOPING SURFACE FOR COACTING WITH SAID RADIAL OUTER SIDE OF THE ASSOCIATED RECTANGULAR GROOVE TO LIMIT THE LONGITUDINAL MOVEMENT OF THE SPLIT RING.

2. The pipe coupling of claim 1, wherein the radial cross section of each half of the split ring is an irregular pentagon having its base serrated to form gripping teeth, the other four sides being substantially straight lines, a first side adjoining said base being substantially perpendicular to said base, a second side adjoining said perpendicular first side being substantially parallel to said base, a third side adjoining said second side being substantially parallel to said first side and the fourth side being said sloping side and connecting said third side and said base and said first, second, and third sides forming the outline of the flange which limits the longitudinal movement of said split ring.