|
Pipe compression seal for bell and spigot joint
| Details |
Inventors: Anderson, Kenneth W.;
Assignee: Anderson Seal Company, Inc. (Springfield, IL)
Primary Examiner: Ward, Jr.; Robert S.
Assistant Examiner:
Attorney, Agent or Firm: LeBlanc, Nolan, Shur & Nies
An improved seal system for the bell and spigot joint of a concrete pipe. The seal includes a bell sealing ring and a spigot sealing ring, each constructed of plastic material which when the spigot is received in the bell form a compression seal which will withstand substantial internal pressure without leaking. The ring members include, respectively, outwardly directed and inwardly directed ridges or flanges which are embedded in the respective bell and spigot ends of the concrete pipe. The spigot end ring, however, includes a central concave depression which extends into the concrete and receives an O-ring, and a lower depending flange also embedded in the concrete forming the spigot end. The joint of this invention then forms a reinforced concrete pipe capable of withstanding substantial internal pressure at least up to 50-60 pounds per square inch. |
|
DETAILED DESCRIPTION I claim: 1.
A pressure resistant system for joining concrete pipes in end-to-end relationship wherein said first pipe terminates in a bell end and the second pipe terminates in a complimentary spigot end telescopically received therein, the bell end defining a bell end face and an internal offset face radically and axially offset from the bell end face, and the spigot end defining a spigot end face and an external offset face radially and axially offset from the spigot end face, the end face and offset face of said bell end of said spigot being connected, respectively, by inner and outer seal mounting surfaces, said system comprising: a bell end sealing ring extending from the bell offset face to the bell end face along the bell seal mounting surface, said ring mounting a plurality of mutually spaced, outwardly directed, circumferential flanges embedded in said bell; a spigot end sealing ring extending from the spigot offset face to the spigot end face along the spigot seal mounting surface, said ring mounting a plurality of mutually spaced, inwardly directed, circumferential flanges embedded in said spigot, the end of said ring adjacent said spigot offset face mounting an integral sealing flange extending outwardly at an angle thereto and embedded in said pipe below the spigot offset surface, said ring further defining a central, circumferential, concave groove embedded in said spigot; and an O-ring seal retained in the spigot ring groove between the spigot and bell sealing rings when the spigot end is telescopically received in the bell end.
2.
The system of claim 1 wherein an inwardly directed circumferential flange is mounted on the inner surface of the spigot ring groove and extends into said spigot end.
3.
The system of claim 2 wherein said bell sealing ring includes inwardly and outwardly directed lips disposed, respectively, along a portion of the bell offset and bell end faces, the inwardly directed lip mounting a circumferential flange extending into the offset face
|
|
Screen Walls 
