Flexible pipe coupling
First Claim
1. A coupling for the establishment of a fluidtight connection between the neighboring end portions of two pipes, comprising a deformable elastic sleeve having two open ends, an external surface, an internal surface, a substantially centrally located annular partition extending from said internal surface and disposed between the end portions of the pipes which are inserted into the sleeve through the respective open ends, two inner circumferential grooves provided in said internal surface at the opposite sides of said partition, and a third circumferential groove provided in said external surface;
- and a clamping unit including a split ring surrounding said external surface and having a first corrugation extending into said third groove, said ring further having two outwardly extending projections which are relatively movable between a first position in which said projections are separated by a first distance as considered circumferentially of said ring and a second position in which said projections are separated by a smaller second distance as considered circumferentially of said ring, and said clamping unit further having tightening means for drawing said projections from said first position to said second position to thereby tighten said ring around the external surface of and deform said sleeve, said clamping unit also including an arcuate insert which bridges at least the major part of the gap between said projections in said first position and is at least partially disposed between said ring and the external surface of said sleeve in said second position, and said insert having a second corrugation extending into said third groove and receiving the adjacent portion of the first corrugation in said second position.
1 Assignment
0 Petitions
Accused Products
Abstract
A flexible pipe coupling for the end portions of two pipes has an elastic sleeve whose open ends receive the end portions of the pipes and which has a centrally located partition extending from its internal surface and abutting against the end faces of the inserted pipes. The partition is flanked by two internal grooves which are formed in the internal surface and are flanked by annular surfaces sloping inwardly toward the partition. The external surface of the sleeve has a centrally located outer groove and is surrounded by a split ring forming part of a clamp and having apertured lugs extending outwardly from the two end portions of the ring to be moved nearer to each other by a bolt and nut assembly whose shank extends through the apertures so that the sleeve is compressed and its internal surface sealingly engages the external surfaces of the pipes. The split ring has a corrugation which extends into the outer groove of the sleeve. A second corrugation is provided on an arcuate insert which is placed between the split ring, in the region of its end portions, and the external surface of the sleeve, and such second corrugation also extends into the outer groove of the sleeve. The marginal portions of the split ring have a frustoconical shape and bear against the external surfaces of the respective pipes when the ring is caused to bear against the external surface of the sleeve.
48 Citations
20 Claims
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1. A coupling for the establishment of a fluidtight connection between the neighboring end portions of two pipes, comprising a deformable elastic sleeve having two open ends, an external surface, an internal surface, a substantially centrally located annular partition extending from said internal surface and disposed between the end portions of the pipes which are inserted into the sleeve through the respective open ends, two inner circumferential grooves provided in said internal surface at the opposite sides of said partition, and a third circumferential groove provided in said external surface;
- and a clamping unit including a split ring surrounding said external surface and having a first corrugation extending into said third groove, said ring further having two outwardly extending projections which are relatively movable between a first position in which said projections are separated by a first distance as considered circumferentially of said ring and a second position in which said projections are separated by a smaller second distance as considered circumferentially of said ring, and said clamping unit further having tightening means for drawing said projections from said first position to said second position to thereby tighten said ring around the external surface of and deform said sleeve, said clamping unit also including an arcuate insert which bridges at least the major part of the gap between said projections in said first position and is at least partially disposed between said ring and the external surface of said sleeve in said second position, and said insert having a second corrugation extending into said third groove and receiving the adjacent portion of the first corrugation in said second position.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A coupling for the establishment of a fluidtight connection between the neighboring end portions of two pipes, comprising a deformable elastic sleeve having two open ends, an external surface, an internal surface, a substantially centrally located annular partition extending from said internal surface and disposed between the end portions of the pipes which are inserted into the sleeve through the respective open ends, two annular ribs at the opposite sides of said partititon terminating at said internal surface and each having an outer side facing away from and sloping inwardly in a direction towards said partition, two inner circumferential grooves provided in said internal surface at the opposite sides of said partition and each being disposed between said partition and a respective rib, and a third circumferential groove in said external surface;
- and a clamping unit including a split ring surrounding said external surface and having a first corrugation extending into said third groove, said ring being provided with two frustoconical marginal portions which overlie the open ends of said sleeve and taper inwardly in directions away from said partition, and said ring further having two outwardly extending projections which are relatively movable between a first position in which said projections are separated by a first distance as considered circumferentially and a second position in which said projections are separated by a smaller second distance as considered circumferentially of said ring, said clamping unit additionally including tightening means for drawing said projections from said first position to said second position to thereby tighten said ring around the external surface of and deform said sleeve, and said tightening means comprising a single bolt, said bolt extending through said projections and being disposed substantially midway said projections and being disposed substantially midway between the axial ends of said ring, and said clamping unit also including an arcuate insert which bridges at least the major part of the gap between said projections in said first position and is at least partially disposed between said ring and the external surface of said sleeve in said second position, said insert having a second corrugation extending into said third groove and receiving the adjacent portion of the first corrugation in said second position.
- View Dependent Claims (16, 17, 18, 19, 20)
Specification