Pipe joints or couplings – Flexible joint – rigid members – Concrete – clay – or masonry pipe
Reexamination Certificate
2008-05-20
2008-05-20
Dunwoody, Aaron (Department: 3679)
Pipe joints or couplings
Flexible joint, rigid members
Concrete, clay, or masonry pipe
C285S141100, C285S194000, C285S208000
Reexamination Certificate
active
07374210
ABSTRACT:
A hydro concrete to pipe sealing arrangement consisting of a main sealing sleeve having a first end and a second end, the main sealing sleeve consisting of two halves which interfit with each other to accommodate dimension variations during forming of a concrete casing wall; a rubber sleeve having a first end and a second end, the rubber sleeve being located on an interior of the main sealing sleeve wherein the rubber sleeve is entirely surrounded by the main sealing sleeve; the rubber sleeve having rings located on an interior surface which face towards the first end of the rubber sleeve, wherein the rings will slant in the same direction as a pipe being inserted, the rings being compressed between the pipe and the rubber sleeve; at least two hydro penetration stopping rings formed on an exterior surface of the main sealing sleeve and extending radially opposite from the rubber sleeve; at least two retainer rings embedded within an interior of the rubber sleeve at the first end and the second end of the rubber sleeve, and seals located at the first end and the second end of the main sealing sleeve to create a seal between the pipe to be inserted and the concrete casing wall.
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patent: 2003/0019163 (2003-01-01), Dittel
Dunwoody Aaron
Kee Fannie C
Staskal Jeffery Gene
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