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Home Coded Pipe-repair-assembly

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 Pipe repair assembly

Details
Inventors: Firestone, Douglas B.;
Assignee:
Primary Examiner: Callaghan; Thomas F.
Assistant Examiner:
Attorney, Agent or Firm: Brown, Martin, Haller & McClain

A weldless pipe repair assembly comprises a cylindrical hub member having a through bore, the hub member being formed in two separable, mating parts for slidable interfitting engagement, a first one of the parts having a longitudinal slot for fitting the part transversely over a pipe in the area of a leak or rupture, prior to sliding the second part into engagement with the first part so that the hub member surrounds the pipe. At least one sealing sleeve is designed to fit in the hub bore to seal the space between the pipe and hub member, the sleeve being slit to allow it to fit over the pipe, and a locking assembly is provided for urging the sleeve into the hub member and sealing the sleeve against the pipe.

DETAILED DESCRIPTION It is an object of the present invention to provide an improved pipe repair assembly which does not require welding or cutting out of a damaged pipe section.
According to the present invention, a pipe repair assembly is provided which comprises an elongate hub member having a through bore sized to fit over a pipe, the hub member being formed in two separate slidably interfitting portions, a first one of the portions having a longitudinal slot sized to allow the portion to be fitted transversely over a section of pipe to be repaired, and the second portion being slidable longitudinally into the first section to cover the slot, at least one sealing sleeve for fitting in the gap between the hub member through bore and the pipe, the sleeve having a slit to allow it to be fitted over the pipe, and a locking assembly for urging the sealing sleeve into the hub member through bore and sealing it against the pipe.
In the preferred embodiment of the invention, the hub member through bore has frusto-conical sections of opposite taper extending from its opposite ends towards the central area of the hub member, and two sealing sleeves are provided for fitting into the respective opposite frusto-conical sections of the hub member, the sealing sleeves having frusto-conical outer surfaces of complementary shape to the frusto-conical hub sections for mating engagement with the hub through bore.
The inner diameter of the sleeves is sized for a close sliding fit over the pipe, and in the preferred embodiment of the invention the sleeves have complementary formations at their inner ends for allowing the sleeves to overlap into sealing engagement with one another when urged into opposite ends of the hub by the locking assembly.
For example, one of the sleeves may have a frusto-conical indent at its inner end for receiving the corresponding inner end of the other sleeve when both sleeves are urged into locking engagement in the hub.
The sleeves are preferably of Teflon or the like, which is durable and resistant to extreme temperatures, as well as being substantially inert or non-reactive to most chemicals


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