Michael S Ingham

US Patent:

20220243420, Aug 4, 2022

Filed:

Feb 1, 2021

Appl. No.:

17/248635

Inventors:

- Des Moines IA, US
Michael Ingham - Overland Park KS, US

International Classification:

E02D 29/12

Abstract:

The method of repairing a manhole begins with assembling concrete forms above ground to correspond to the shape of the manhole wall. Then, a plastic liner sheet is wrapped around the assembled forms and the seams are welded. The forming sections are then removed, and the liner is placed in the manhole. An annular space exists between the liner and the manhole wall. The forming sections are re-assembled inside the liner. Concrete is then poured into the annular space and allowed to cure. The forming sections are removed, leaving the liner anchored in a new monolithic concrete wall fully engaging the old manhole wall.

US Patent:

20200332488, Oct 22, 2020

Filed:

Apr 17, 2020

Appl. No.:

16/851772

Inventors:

- Des Moines IA, US
Michael Ingham - Overland Park KS, US

International Classification:

E02D 15/04
E02D 29/14

Abstract:

A monolithic manhole is formed in a levee without trenching, to provide access to drain pipes within the levee for maintenance and repair of the pipes. The manhole is formed by first forcing an outer tube downwardly into the earth and levee and removing soil from within the outer tube to expose the pipe. An inner tube is lowered into the outer tube, with an annular space maintained between the tubes. The annular space is filled with concrete, which hardens to form a monolithic vertical wall. A concrete floor may be poured at the bottom of the wall and a cover attached to the top of the wall. A hole is cut in the pipe inside the wall to provide internal access to the pipe.