Pipe joint

Claim 2

A joint comprising: a. a substantially imperforate wall, b. means defining an opening through said wall, c. portions of said wall being offset and defining a radially inwardly projecting annular shoulder, d. a resilient, annularly shaped gasket mounted in said opening, e. said gasket in cross section including a substantially triangular main section, f. a first apex of said main section defining a sealing portion of said gasket. g. a second apex of said main section positioned in said wall adjacent an outer surface thereof, h. an outer lip extending from said second apex inwardly of said opening in said wall, i. said outer lip and an outer face of said main section extending between said first and second apexes defining a first groove, j. a first relatively rigid reinforcing member received in said first groove and preventing dislocation of said second apex radially inwardly of said opening, k. an inner lip extending from a third apex of said main section, l. said inner lip and an inner face of said main section extending between said first and third apexes defining a second groove, m. a second relatively rigid reinforcing member received in said second groove and preventing movement of said third apex radially inwardly of said opening, n. anchoring portions of said gasket being anchored in said wall radially outwardly of said shoulder, and o. said sealing portion of said gasket projecting radially inwardly of said opening beyond said annular shoulder.

Claim 3

A joint comprising: a. a substantially imperforate wall, b. means defining an opening through said wall, c. portions of said wall being offset and defining a radially inwardly projecting annular shoulder, d. a resilient, annularly shaped gasket mounted in said opening, e. said gasket in cross section including a substantially triangular main section, f. a first apex of said main section defining a sealing portion of said gasket. g. a second apex of said main section positioned in said wall adjacent an outer surface thereof, h. an outer lip extending from said second apex inwardly of said opening in said wall, i. said outer lip and an outer face of said main section extending between said first and second apexes defining a first groove, j. a first relatively rigid reinforcing member received in said first groove and preventing dislocation of said second apex radially inwardly of said opening, k. an inner lip extending from a third apex of said main section, l. said inner lip and an inner face of said main section extending between said first and third apexes defining a second groove, m. a second relatively rigid reinforcing member received in said second groove and preventing movement of said third apex radially inwardly of said opening, n. anchoring portions of said gasket being anchored in said wall radially outwardly of said shoulder, and o. said sealing portion of said gasket projecting radially inwardly of said opening beyond said annular shoulder.

Claim 4

A joint comprising: a. a substantially imperforate wall, b. means defining an opening through said wall, c. portions of said wall being offset and defining a radially inwardly projecting annular shoulder, d. a resilient, annularly shaped gasket mounted in said opening, e. said gasket in cross section including a substantially triangular main section, f. a first apex of said main section defining a sealing portion of said gasket. g. a second apex of said main section positioned in said wall adjacent an outer surface thereof, h. an outer lip extending from said second apex inwardly of said opening in said wall, i. said outer lip and an outer face of said main section extending between said first and second apexes defining a first groove, j. a first relatively rigid reinforcing member received in said first groove and preventing dislocation of said second apex radially inwardly of said opening, k. an inner lip extending from a third apex of said main section, l. said inner lip and an inner face of said main section extending between said first and third apexes defining a second groove, m. a second relatively rigid reinforcing member received in said second groove and preventing movement of said third apex radially inwardly of said opening, n. anchoring portions of said gasket being anchored in said wall radially outwardly of said shoulder, and o. said sealing portion of said gasket projecting radially inwardly of said opening beyond said annular shoulder.

Claim 5

The joint of claim 1 wherein: a. said outer face of said main section is convex at a point adjacent said first apex.

Claim 6

In a joint including a manhole riser having internal and external surfaces and a further surface defining a pipe receiving opening through a wall of said riser from said internal surface to said external surface, a pipe section intersecting said riser at substantially right angles to the longitudinal axis thereof with an end of said pipe section received in said opening and a gasket interposed between an outside surface of said end of said pipe section anD opposing portions of said surface of said riser defining said opening therethrough, the improvement comprising: a. a said gasket having: i. a main section, ii. a sealing portion, and iii. an anchoring portion, b. said surface defining said opening comprising: i. a main section, ii. a gasket engaging section, and iii. shoulder section, c. said shoulder section of said surface projecting radially inwardly a greater distance than said main section and said gasket engaging section, d. said anchoring portion of said gasket being imbedded in said wall radially outwardly of said main section and said shoulder section of said opening defining surface, e. the internal diameter of said shoulder section of said surface being greater than the external diameter of said end of said pipe and adapted to engage said end of said pipe upon relative shifting movement of said opening defining surface and said end of said pipe in directions other than parallel to the length of said pipe, f. said main section of said gasket being disposed within said opening with portions of said main section of said gasket disposed radially outwardly of said inwardly projecting shoulder section of said opening defining surface and interconnecting said anchoring portion and said sealing portion of said gasket, g. said sealing portion of said gasket projecting radially inwardly from said main section of said gasket and engaging said outside surface of said pipe in sealing relationship thereto, and h. said sealing portion of said gasket, prior to insertion of said end of said pipe into said opening in said riser, projecting radially inwardly of said opening beyond said radially inwardly projecting shoulder section of said surface and having an internal diameter less than said external diameter of said pipe, whereby said sealing portion of said gasket engages said end of said pipe in said sealing relationship thereto and maintains said sealing relationship even upon said relative shifting movement of said opening defining surface and said end of said pipe and consequent engagement of said shoulder by said pipe.

Claim 7

In a joint including a manhole riser having internal and external surfaces and a further surface defining a pipe receiving opening through a wall of said riser from said internal surface to said external surface, a pipe section intersecting said riser at substantially right angles to the longitudinal axis thereof with an end of said pipe section received in said opening and a gasket interposed between an outside surface of said end of said pipe section anD opposing portions of said surface of said riser defining said opening therethrough, the improvement comprising: a. a said gasket having: i. a main section, ii. a sealing portion, and iii. an anchoring portion, b. said surface defining said opening comprising: i. a main section, ii. a gasket engaging section, and iii. shoulder section, c. said shoulder section of said surface projecting radially inwardly a greater distance than said main section and said gasket engaging section, d. said anchoring portion of said gasket being imbedded in said wall radially outwardly of said main section and said shoulder section of said opening defining surface, e. the internal diameter of said shoulder section of said surface being greater than the external diameter of said end of said pipe and adapted to engage said end of said pipe upon relative shifting movement of said opening defining surface and said end of said pipe in directions other than parallel to the length of said pipe, f. said main section of said gasket being disposed within said opening with portions of said main section of said gasket disposed radially outwardly of said inwardly projecting shoulder section of said opening defining surface and interconnecting said anchoring portion and said sealing portion of said gasket, g. said sealing portion of said gasket projecting radially inwardly from said main section of said gasket and engaging said outside surface of said pipe in sealing relationship thereto, and h. said sealing portion of said gasket, prior to insertion of said end of said pipe into said opening in said riser, projecting radially inwardly of said opening beyond said radially inwardly projecting shoulder section of said surface and having an internal diameter less than said external diameter of said pipe, whereby said sealing portion of said gasket engages said end of said pipe in said sealing relationship thereto and maintains said sealing relationship even upon said relative shifting movement of said opening defining surface and said end of said pipe and consequent engagement of said shoulder by said pipe.

Claim 8

The joint of claim 3 wherein: a. said main section of said gasket is substantially triangular in cross section, and b. a first apex of said main section defines said sealing portion of said gasket.

Claim 9

The joint of claim 4 wherein: a. said triangular main section of said gasket includes an inner face which prior to said insertion of said pipe end lies in a plane extending substantially parallel to the longitudinal axis of said manhole riser.

Claim 10

The joint of claim 4 further comprising: a. a second apex of said main section disposed adjacent said external surface of said riser, b. an outer lip of said gasket projecting from said second apex inwardly of said opening defining surface in said wall of said riser, c. said outer lip and an outer face of said main section extending between said first and second apices defining a first groove, and d. a first, relatively rigid reinforcing hoop received in said first groove and preventing dislocation of said second apex of said gasket radially inwardly of said opening.

Claim 11

The joint of claim 6 wherein: a. said anchoring portion of said gasket includes an anchoring lip projecting from said second apex of said gasket into said riser wall in a direction substantially opposite to the direction of projection of said outer lip, and b. means defining a socket extending radially outwardly from said opening defining surface and receiving said anchoring lip.