Pipe joints or couplings – With fluid pressure seal – Flexible lip
Patent
1987-02-06
1988-02-23
Callaghan, Thomas F.
Pipe joints or couplings
With fluid pressure seal
Flexible lip
285236, 285373, F16L 2106
Patent
active
047266112
ABSTRACT:
A flexible pipe coupling wherein an elastic sleeve has a centrally located annular internal partition which is contracted by the end faces of the end portions of two pipes which are inserted through the respective open ends of the sleeve. The sleeve has pairs of deformable annular sealing ribs which are disposed at opposite sides of the partition and engage the peripheral surfaces of the respective pipes. The ribs are separated from the partition by annular internal grooves of the sleeve, and the external surface of the sleeve has a centrally located outer groove for the circumferentially extending corrugations of a split ring having end portions provided with projections which can be moved toward each other by a bolt and nut to deform the ribs into sealing engagement with the respective pipes. An arcuate insert is disposed between the end portions of the split ring and the external surface of the sleeve and is provided with corrugations which are complementary to and receive the adjacent portions of corrugations of the split ring. The corrugations of the insert are mirror symmetrical to each other with reference to a plane which extends at right angles to the axis of and halves the split ring. The latter has axially outwardly and radially inwardly tapering marginal portions, and the distance from such marginal portions to the respective corrugations of the split ring is less than the combined width of the sealing ribs at the respective axial ends of the sleeve. This ensures the establishment of a satisfactory sealing action even if the pipes are inclined relative to each other and even if the planes of the end faces of the pipes are not exactly normal to the axes of the respective pipes.
REFERENCES:
patent: 3565468 (1971-02-01), Garrett
patent: 4380348 (1983-04-01), Swartz
patent: 4616858 (1986-10-01), Sauer
patent: 4627645 (1986-12-01), Sauer
patent: 4652023 (1987-03-01), Timmons
Callaghan Thomas F.
Kontler Peter K.
Rasmussen GmbH
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