Connecting arrangement with a threaded sleeve
AssigneeFriedrichsfeld GmbH Keramik- und Kunststoffwerke
InventorKnut Hildner
Life of this patent
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Abstract
A connecting arrangement comprising a threaded sleeve of synthetic plastic material and a tube portion having a pipe thread. The threaded sleeve contains an insert nut with an internal thread and a synthetic plastic ring which is engaged by the pipe thread of the tube portion. The tube portion has at its forward end a supplemental sealing ring which sealingly engages a sealing region of the synthetic plastic ring. The sealing region is spaced from the axial ends of the threaded sleeve and has an inner diameter which is smaller than the outer diameter of the sealing ring. A further seal may be provided by disposing an adhesive sealing mass in an annular groove on the tube portion such that the mass adheres the tube portion to the sleeve when they are connected.
Claims25
A connecting arrangement between a threaded sleeve of synthetic plastic material and a tube portion having a pipe thread thereon, wherein said threaded sleeve comprises an insert nut with an internal thread and an inner synthetic plastic ring which is engaged by the pipe thread of said tube portion, wherein said tube portion comprises a supplemental sealing ring, and wherein said synthetic plastic ring comprises a first sealing region within said insert nut spaced from an axial end face of said plastic ring and having an inner diameter smaller than the outer diameter of said pipe thread on said tube portion, and a second sealing region within said insert nut axially adjoining said first sealing region through a radial step and having an inner diameter smaller than the inner diameter of said first sealing region and smaller than the outer diameter of said sealing ring, said pipe thread of said tube portion sealingly engaging said first sealing region, and said sealing ring of said tube portion sealingly engaging said second sealing region of said synthetic plastic ring when said tube portion is connected to said threaded sleeve.
A connecting arrangement between a threaded sleeve of synthetic plastic material and a tube portion having a pipe thread thereon, wherein said threaded sleeve comprises an insert nut with an internal thread and an inner synthetic plastic ring which is engaged by the pipe thread of said tube portion, wherein said tube portion comprises a supplemental sealing ring, wherein said synthetic plastic ring comprises a sealing region spaced from an axial end face of said plastic ring and having an inner diameter smaller than the outer diameter of said sealing ring, said sealing ring of said tube portion sealingly engaging said sealing region of said synthetic plastic ring when said tube portion is connected to said threaded sleeve, and wherein said tube portion further comprises an annular groove disposed between said sealing ring and said pipe thread and containing an elastic adhesive sealing mass, said adhesive mass tightly adhering said tube portion to said threaded sleeve when said tube portion is screwed into said threaded sleeve.
Dependencies are inferred from the claim text.