Device for the secured connection of two end fittings, particularly of a pipe
First Claim
1. A device for the connection of a first end fitting onto a second end fitting, the device comprising:
- a nut provided at a first extremity with a threaded bore into which is screwed the first end fitting along a longitudinal axis to a tightened position in which the first end fitting is subject to axial stress with the second end fitting received in the nut,the nut and the second end fitting being shaped so as to limit the axial displacement of the nut with respect to the second end fitting in the direction of screwing of the nut, andanti-rotation structure located between the nut and at least one of the first and second end fittings, called the locking end fitting, the anti-rotation structure comprising at least one strip placed around the locking end fitting and extending over a determined angular sector about the longitudinal axis,the strip comprising at least one protrusion and a hole through the strip and surrounding a portion of the protrusion, whereby the protrusion is capable of entering radially and elastically into at least one concavity, during the relative rotation between the nut and the locking end fitting, and emerging therefrom when a torque exceeding a predetermined threshold is applied between the nut and the locking end fitting,the strip and the concavity being respectively mounted and formed on the nut and on the locking end fitting or vice-versa.
1 Assignment
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Accused Products
Abstract
The device connects a first end fitting to a second end fitting, particularly of a pipe. A nut is provided with a threaded bore into which the first end fitting is screwed along a longitudinal axis. In the tightened position, the first end fitting is axially stressed relative to the second end fitting housed in the nut. Rotation-proofing structure is provided between the nut and at least one of the first and second end fittings hereafter referred to as the locking end fitting. The rotation-proofing structure includes at least one strip arranged around the locking end fitting. The strip comprises at least one protrusion radially penetrating into at least one concavity.
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Citations
25 Claims
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1. A device for the connection of a first end fitting onto a second end fitting, the device comprising:
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a nut provided at a first extremity with a threaded bore into which is screwed the first end fitting along a longitudinal axis to a tightened position in which the first end fitting is subject to axial stress with the second end fitting received in the nut, the nut and the second end fitting being shaped so as to limit the axial displacement of the nut with respect to the second end fitting in the direction of screwing of the nut, and anti-rotation structure located between the nut and at least one of the first and second end fittings, called the locking end fitting, the anti-rotation structure comprising at least one strip placed around the locking end fitting and extending over a determined angular sector about the longitudinal axis, the strip comprising at least one protrusion and a hole through the strip and surrounding a portion of the protrusion, whereby the protrusion is capable of entering radially and elastically into at least one concavity, during the relative rotation between the nut and the locking end fitting, and emerging therefrom when a torque exceeding a predetermined threshold is applied between the nut and the locking end fitting, the strip and the concavity being respectively mounted and formed on the nut and on the locking end fitting or vice-versa. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 25)
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19. An assembly for coupling first and second fluid conduits, the assembly comprising:
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a nut, comprising; a circumferential sidewall defining an inner surface and an outer surface, a recess in said inner surface and having a limited circumferential extent, screw threads formed in said inner surface for engaging corresponding screw threads of a complementary component, and a circumferentially extending groove formed in said inner surface; and at least one rotation-inhibiting member received in said groove, said rotation inhibiting member including; at least one radially inwardly extending protrusion, at least one radially outwardly extending projection received in said recess and fixing said rotation-inhibiting member circumferentially within said groove, and at least one terminal end spaced circumferentially along said rotation-inhibiting member a circumferential distance less than 270 degrees from said radially outwardly extending projection. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification