Riser assembly for underground pipe connections
AssigneeDonald Harrington
InventorDonald Weber Harrington
Life of this patent
Estimating the term…
Abstract
The riser assembly includes a riser for fluid connection between a main fitting and a lateral pipe at different elevations. The lateral pipe is connected to the riser pipe by a 90.degree. bend having an elongated bell along its vertically extending portion for slidably receiving the upper end of the riser pipe. The vertical bell rests on a casing cap overlying a casing pipe concentric with, but spaced from, the riser pipe. The casing pipe terminates in a casing shoe resting on bedding material about the riser whereby loads are transferred to the casing pipe and casing shoe without loading the riser pipe.
Claims14
A riser assembly for underground pipe connections between a lateral pipe disposed above a generally horizontally extending main pipe and having a riser pipe extending generally vertically from a main fitting on the main pipe comprising:
- a casing pipe for surrounding and axial movement relative to the riser pipe;
- a casing cap connected to the casing pipe at its upper end;
- and
- an elbow having a horizontally extending portion for connection with the lateral pipe and a vertical extending portion for slidably receiving an upper end of the riser, said vertical portion engaging said casing cap, said casing pipe having a casing shoe adjacent a lower end thereof for distributing loading on the casing pipe, casing cap and elbow to surrounding bedding without loading the riser or main fitting.
A riser assembly according to claim I wherein said casing cap has an opening for receiving the upper end of the riser enabling the riser to be received in the vertical portion of the elbow.
A riser assembly for underground pipe connections comprising:
- a main pipeline having a main fitting with an upwardly extending bell;
- a riser pipe extending generally vertically from said main fitting and having a lower end thereof received in said bell;
- a casing member surrounding at least in part and movable relative to said riser pipe;
- a casing cap disposed on an upper end of said casing member and having an opening therethrough for receiving an upper end portion of said riser pipe;
- a lateral pipe;
- a generally 90.degree. bend having a horizontal portion including a bell for receiving an end of said lateral pipe;
- said bend having a vertical portion including a bell engaging the casing cap, said vertical portion extending a greater distance than said horizontal portion and slidably receiving the upper end portion of the riser;
- said casing member having a casing element for distributing loading on the casing pipe, casing cap, and 90.degree. bend to surrounding material without substantially loading the riser pipe.
Dependencies are inferred from the claim text.