Pipe fitting with composite gasket assembly
A pipe fitting includes a body having sockets for receiving pipes therein and a composite gasket housed within a circumferential gasket retention housing integral with the socket. The composite gaskets include a V-shaped carrier of relatively stiff plastic having an elastomeric seal portion bonded thereto.
1. A pipe fitting for telescopically receiving at least one pipe, said fitting comprising:
a body having a generally cylindrical wall defining an opening for receiving a pipe;
said body further defining an annular gasket retention space; and
a gasket housed within said annular gasket retention space, said gasket having a V-shaped portion and a sealing portion, said V-shaped portion being formed of a stiffer material than said sealing portion;
said V-shaped portion having a hinge portion and a pair of legs, said pair of legs extending away from said hinge portion;
wherein said gasket is positioned in said annular gasket retention space such that the hinge portion of said V-shaped portion is farther away from said opening for receiving a pipe than said pair of legs, said pair of legs extending toward said opening for receiving a pipe; and
wherein said sealing portion has an annular sealing ring.
2. A pipe fitting according to claim 1 , wherein said gasket is radially compressed by a pipe inserted axially into said opening for receiving a pipe.
3. A pipe fitting according to claim 1 , wherein said gasket is elastically and radially compressed by a pipe inserted axially into said opening for receiving a pipe.
4. A pipe fitting according to claim 1 , wherein said V-shaped portion and said sealing portion are co-molded.
5. A pipe fitting according to claim 1 , wherein said V-shaped portion is elastically deformed by a pipe inserted telescopically into said opening for receiving a pipe.
6. A pipe fitting according to claim 1 , wherein said gasket seals against a flow of sewage through said pipe fitting.
7. A pipe fitting according to claim 1 , wherein said V-shaped portion is formed from low density polyethylene.
8. A pipe fitting according to claim 1 , wherein said sealing portion is an elastomeric material.
9. A pipe fitting according to claim 1 , wherein said sealing portion is formed from synthetic rubber.
10. A pipe fitting according to claim 1 , wherein said pair of legs includes an inner leg and an outer leg and said sealing portion further comprises a scraper ring integral with and extending radially inwardly from said inner leg of said V-shaped portion, such that a portion of an outside surface of a pipe inserted into said fitting will be scraped as the pipe is inserted.
11. A pipe fitting according to claim 1 , wherein said body is molded of plastic.
12. A pipe fitting according to claim 1 , wherein said body is molded of polyvinylchloride.
13. The pipe fitting recited in claim 1 , wherein said sealing portion has a plurality of external annular beads.