Patent ID: 7909370

Claim:
A root-repellant sleeve-type drain pipe connector for connecting two co-axial pipe portions facing each other end-to-end in an underground drain pipeline, comprising: an annular sleeve of resilient material configured in a tubular shape and fitted onto end regions of the two pipe portions; first compression clamping means for compressing and sealing designated annular regions inside said sleeve against interfacing outer surface regions of each of the two pipe portions in a manner to create and preserve water-tightness of the pipeline; and designated root-repellant material disposed in a manner to repel forward root end growth tending to penetrate interfacing regions between said sleeve and each of the two pipe end regions in respective interface regions thereof; wherein said designated root-repellant material is configured as two generally tubular collars of thin solid material located, at least in part, in the respective interface regions between the sleeve interior and the respective end exterior regions of the two pipe portions, disposed in opposite end regions of said sleeve, outside the regions compressed by said first compression clamping means; wherein each collar is disposed in a manner to cause a portion of the collar to extend outwardly beyond the end of said sleeve for inspection purposes.