Schwing America, Inc.

Other

Schwing Bioset, Incorporated

Thomas M Anderson

Charles Michael Wanstrom

Richard T Atherton

Brian Eugene Spencer

David R Bissen

Lawrence P Schmidt

Leo B Willner

Harry K Crow

Richard Lloyd Grover

Berthold A Fehn

Edward A Oakley

Franz Tillman

Terry Atherton

Scott Kelly

Wim H M Moerman

Larry Schmidt

Enrique Gomez

Lakshminarasimha Krishnapura

Robert A Edwards

Alexander Krasny

Phil Serre

Jonathan N Orr

Thomas Eggert

Alex Krasny

Shahzad M Khan

Evran Y Ener

Julius Hanewald

Patrick E Powers

Michael M Mott

Charles M Wanstrom

Charles Wanstrom

A waste treatment process utilizes a two-stage digestion process with a thermophilic digester, a heat exchanger, and a mesophilic digester. The pH of the thermophilic digestate is increased by removal of carbon dioxide with an air stripper, or by adding a pH increasing reagent upstream of the heat exchanger. The pH adjustment of the digestate protects the heat exchanger and downstream equipment and processes from struvite formation. A struvite reactor may be located in various locations downstream of the heat exchanger to produce a treated digestate or effluent that contains struvite, which can optionally be recovered for beneficial use.

Struvite recovery and phosphorus management techniques for wastewater treatment plants

A method of processing biological solids includes blending a sludge with calcium oxide and delivering the blended sludge and calcium oxide to a pressurized container; injecting, into the blended sludge and calcium oxide in the pressurized container, an additive capable of exothermic reactions with the calcium oxide; regulating pH in the pressurized container to produce class A biological solids from the sludge; and pumping the blended sludge, calcium oxide, and additive from the pressurized container to a reactor. A system used for this process include sources of calcium oxide and biological solids, an additive injector, and a pressurized reactor.

Biological solids processing

Disclosed is a pillow having a head portion having a head-shaped cavity sized in approximate proportions to receive a human head. The head portion has an inner surface, an outer surface, an open face, a left side, a left-side ear hole, a right side, a right-side ear hole, and an open bottom. There are a plurality of pads inside the head-shaped cavity that are selectively removable from the head-shaped cavity to accommodate a variety of head sizes and a washable liner covering the plurality of pads that is selectively removable from the pillow to accommodate laundering. The pillow has a neck portion extending from the open bottom and a circumferential pad on the outer surface of the head portion that is selectively removable to increase or decrease the size of the head portion.

Whole-head pillow

An ignition interlock assembly (), including an ignition interlock device () and a logic circuit controller (), ensures that a vehicle equipped with assembly () and a start-stop functionality will maintain the normal operation of the vehicle even in the event that a failed rolling retest () occurs when the start-stop functionality is engaged. The controller () preferably includes a pair of normally-opened, interconnected relays which remain energized throughout the operation of the vehicle.

Interlock device for start-stop enabled vehicles

A dolly capable of allowing relatively heavy and bulky objects to be easily manipulated and moved without adding significantly to the dimension of the object thereby allowing the object to be easily moved through conventional door openings. Preferably, the dolly comprises a first frame having generally vertical legs mechanically coupled to a generally horizontal brace and a second frame having generally vertical legs mechanically coupled to a generally horizontal brace such that the first frame and the second frame are in position on opposite sides of the object and the generally horizontal braces are positioned under corresponding edges of the object. The generally vertical legs of the first frame and the second frame when moved into a more vertical orientation operate to mechanically lift the generally horizontal braces to lift the object and allow the object to be transported to a desired location.

Dolly for moving objects

A sludge flow monitoring system and method measures volume of sludge pumped by a positive displacement pump through a pipeline by determining a fill percentage during each pumping cycle. The start and end of each piston stroke are identified by hydraulic system sensors. The fill percentage is determined based upon a first summation of periodic piston speed command values from the start of a pumping stroke to the end of a pumping stroke, and a second summation of periodic piston speed command values from a poppet valve opening indicating output flow from the pump to the end of the pumping stroke.

Sludge flow measuring system

A drying system includes a fluidized bed dryer and fluidizing gas loop. The system is a closed loop so that fluidizing gas used to dry particulate matter can be reconditioned and recycled to fluidize and dry additional particulate matter. The fluidizing gas is reconditioned by removing fine particulates and water vapor. The drying system includes oxygen control features to prevent oxygen from entering the system. A method for drying particulate matter includes fluidizing the particulate matter in a dryer with a fluidizing gas, heating the particulate matter to remove water, removing water vapor and fluidizing gas from the dryer, removing fines and water vapor from the fluidizing gas, recirculating the fluidizing gas to the dryer to fluidize additional particulate matter and removing dried particulate matter from the dryer. A modular drying system reduces the amount of construction necessary at the installation site.

Closed loop drying system and method

A pump system for pumping a viscous material that includes N positive displacement pumps, where N is an integer greater than two, and a hydraulic drive. Each pump has an inlet and an outlet therefrom, and a pair of cylinders each with a piston movable in a reciprocating stroke cycle therein. The hydraulic drive is connected to the N positive displacement pumps to reciprocate the pistons within the cylinders. The stroke cycle includes a discharging stroke and a filling stroke. The discharging stroke and the filling stroke of the N positive displacement pumps are staggered from one another by 1/N stroke positions such that no two pumps have pistons in the same stroke position at the same time.

Multi-pump sequencing

A method for clearing obstructions in a silo having a reciprocating frame uses an obstruction clearance mode. The method includes driving at least one frame in a reciprocal motion across a silo floor until sensing an indication that at least one frame has encountered an obstruction. Upon sensing the indication of obstruction, an obstruction clearance mode is initiated in an attempt to clear the obstruction.

Obstruction clearance mode for silo with reciprocating frame

A boom section includes a first, a second, a third, and a fourth fiber reinforced thermoset composite material layer and a flex core layer. The first fiber reinforced thermoset composite material layer has glass fibers in a vinyl ester matrix. The second fiber reinforced thermoset composite material layer is disposed over the first composite material layer and has carbon fibers in an epoxy matrix. The flex core layer is disposed over the second composite material layer. The third fiber reinforced thermoset composite material layer is disposed over the flex core layer and has aramid fibers in a vinyl ester matrix. The fourth fiber reinforced thermoset composite material layer is disposed over the third composite material layer and has glass fibers in a vinyl ester matrix.

Boom utilizing composite material construction

A concrete pumping truck having a forward end and a rear end with a hopper attached at the rear end of the concrete pumping truck comprises an auxiliary axle system pivotally attached to the rear end of the truck adjacent the hopper, the auxiliary axle system comprising a pair of pivotable wheels movable between a first position in contact with a ground surface and a second position elevated above the ground surface.

Auxiliary axle system for concrete pump truck

The present invention is a boom system comprising a first boom section having a distal end and a proximal end. A second boom section includes a distal end and a proximal end, wherein the proximal end of the second boom section is rotatably coupled to the distal end of the first boom section. At least one of the boom sections is substantially formed from composite materials.

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Dellwood, MN, United States of America

Thomas M Anderson