Abstract

Power tools with conductive couplings used with active injury mitigation technology are disclosed. Conductive couplings are particularly relevant to table saws, hand-held circular saws, track saws, miter saws, and band saws with active injury mitigation technology. Conductive couplings provide a mechanism through which an electrical signal can be coupled or imparted to a blade, and then monitored for changes indicative of human contact with the blade. An exemplary conductive coupling includes a compliant component that improves the reliability of the electrical connection with a moving part of a power tool. A conductive coupling may be two-sided compliant. A conductive coupling with a compliant component may connect to an arbor to couple an electrical signal to the arbor. A conductive coupling with a compliant component may connect to a motor shaft to minimize electrical noise.

IPC Classes  ?

• E02D 29/12 - Manhole shaftsOther inspection or access chambersAccessories therefor

Abstract

A trenchless method of installing a new poured-in-place manhole liner provides structural rehabilitation to an existing buried manhole, and is extended above the existing manhole to a higher pre-determined elevation to match the finished grade of a raised levee design. The new liner can be formed in a single or double stage process, which substantially eliminates trenching and excavation of soil, so that new levee soil is not disturbed. The process is faster and less expensive than building a totally new manhole, and maintains the structural integrity of the levee.

IPC Classes  ?

• E02D 29/12 - Manhole shaftsOther inspection or access chambersAccessories therefor
• E02D 29/14 - Covers for manholes or the likeFrames for covers

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.

IPC Classes  ?

• E02D 29/12 - Manhole shaftsOther inspection or access chambersAccessories therefor

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.

IPC Classes  ?

• E02D 29/12 - Manhole shaftsOther inspection or access chambersAccessories therefor

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.

IPC Classes  ?

• B28B 1/14 - Producing shaped articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
• B28B 7/36 - Linings or coatings
• B28B 13/02 - Feeding the unshaped material to moulds or apparatus for producing shaped articles
• B28B 21/56 - Methods or machines specially adapted for the production of tubular articles incorporating reinforcements
• E02D 29/12 - Manhole shaftsOther inspection or access chambersAccessories therefor

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.

IPC Classes  ?

• E02D 29/12 - Manhole shaftsOther inspection or access chambersAccessories therefor
• E02D 15/04 - Placing concrete in mould-pipes, pile tubes, boreholes, or narrow shafts
• E02D 29/14 - Covers for manholes or the likeFrames for covers
• E02D 7/02 - Placing by driving
• E02B 3/10 - DamsDykesSluice ways or other structures for dykes, dams, or the like