Donaldson Comapny, Inc.

John T Herman

Wayne M Wagner

Denis J Dudrey

Brad E Kahlbaugh

Susan B Reinhart

Mary Joanne Lorenzen

Michael J Protas

Wenzhong Zhang

James P Shields

Julian A Imes

Bruce B Hoppenstedt

Bernard A Matthys

James A LeBlanc

Mervin E Wright

John R Hiemstra

John I Belisle

Girma Wolde-Michael

Jared D Blaisdell

Gary Dale Reeves

Steve Anderson

Delmer L Radeztsky

The present disclosure relates to a diesel exhaust treatment device including a catalytic converter positioned upstream from a diesel particulate filter. An electric heater is positioned between the catalytic converter and the diesel particulate filter. A shore station can be used to provide power and combustion air to the diesel exhaust treatment device during regeneration of the diesel particulate filter.

Diesel particulate filter regeneration system including shore station

Exhaust treatment device with electric regeneration system

The present disclosure relates to a pulse cleaner for cleaning a diesel exhaust aftertreatment device. The pulse cleaner includes a cabinet, a diesel exhaust aftertreatment device mount positioned within the cabinet for mounting the diesel exhaust aftertreatment device during pulse cleaning, and a collection filter positioned within the cabinet for collecting material displaced from the diesel exhaust aftertreatment device during cleaning. The pulse cleaner can be equipped with features such as an exhaust aftertreatment device core temperature sensor, an air flow concentrator or an air swirling vane. The pulse cleaner can also include adapters for providing system compatibility with different styles of exhaust aftertreatment devices.

Apparatus for cleaning exhaust aftertreatment devices and methods

The present disclosure relates to a pulse cleaner for cleaning a diesel exhaust treatment device. The pulse cleaner includes a cabinet, a diesel exhaust treatment device mount positioned within the cabinet for mounting the diesel exhaust treatment device during pulse cleaning, and a collection filter positioned within the cabinet for collecting material displaced from the diesel exhaust treatment device during cleaning. The pulse cleaner also includes a pulse generator for generating pulses that are each directed at a majority of a face of the diesel exhaust treatment device when the diesel exhaust treatment device is mounted at the diesel exhaust treatment device mount. The pulse generator includes a pressure tank for accumulating pressurized air, and a valve arrangement that flushes the pressurized air from the tank. A pulse of air for cleaning the diesel exhaust treatment device is generated each time the tank is flushed.

An exhaust filter having a pleated filter media mounted between end caps is disclosed herein. The filter has a construction suitable for high temperature environments such as engine exhaust systems.

Exhaust filter

The present disclosure relates to a flexible pipe including a pipe body that extends along a central longitudinal axis. The pipe body is made from a strip that is helically wrapped in a plurality of convolutions. The strip includes inner and outer hook portions that interlock to form an interlock seam between adjacent convolutions. The pipe body includes a mid-portion positioned between first and second end portions. At least the first end portion has an axial length L that traverses at least several of the convolutions of the pipe body. The first end portion is crushed radially inward relative to the mid-portion such that the first end portion has an effective outer diameter D that is smaller than an effective outer diameter D of the mid-portion. A first transition region is positioned between the first end portion and the mid-portion. The first transition region provides a diameter transition between the outer diameter D of the first end portion and the outer diameter D of the mid-portion. The first transition region has an axial length L that traverses at least one of the convolutions of the pipe.

Flexible pipe with compressed ends

The present disclosure relates to a flexible metal hose including a continuous metal strip having rounded lateral edges. The continuous strip is wound in a helical pattern to form a cylindrical hose body. The strip has a generally S-shaped cross section including an inner hook portion and an outer hook portion. The strip is helically wrapped such that the inner and outer hook portions of adjacent wraps interlock to form flexible joints of the hose.

Flexible hose and method for manufacturing

The present disclosure relates to a clamp for sealing a lap joint formed by a first pipe inserted within a second pipe. The clamp includes a strap having a concave inner curvature that curves about a central axis. The strap includes a first axial end positioned opposite from a second axial end. A first axial portion of the strap is positioned at the first axial end, and a second axial portion of the strap is positioned at the second axial end. The first axial portion has a cylindrical inner surface adapted to provide a seal about the first pipe, and the second axial portion has a cylindrical inner surface adapted to form a seal about the second pipe. A radial in-step connects the first and second axial portions. The radial in-step provides a diameter transition between an inner diameter D,of the first axial portion and an inner diameter D,of the second axial portion such that the inner diameter D,is larger than the inner diameter D,. The clamp further includes a single fastener for tightening both the first and second axial portions at the lap joint.

Exhaust system clamp

The present disclosure relates to guillotine clamp including a U-bolt mounted on a saddle member. The U-bolt has a concave portion that opposes a corresponding concave portion of the saddle member. At least one curved shim is positioned between the concave portions of the U-bolt and the saddle member to provide both sealing and clamping of a lap joint.

U-bolt clamp for sealing lap joints

U-bolt clamp

A lap joint includes an outer, flexible, cylindrical tube; an inner, solid, cylindrical pipe; and a securing device for compressing the flexible tube around the pipe for securing the flexible tube to the pipe and for providing a substantially leak-free connection between the flexible tube and the pipe. The flexible tube has first and second ends and a first diameter. The flexible tube includes a plurality of captured slots punched through the flexible tube at least at the first end. The plurality of captured slots have a first plurality of metal deformations to prevent circumferential slippage of the flexible tube and are disposed annularly around the flexible tube. Each of the plurality of captured slots are inboard of the first end and do not extend to the first end. The securing device is arranged and configured to completely cover the plurality of captured slots. The flexible tube also includes a plurality of relief slots punched through the flexible tube at least at the first end. The plurality of relief slots have a second plurality of metal deformations to prevent circumferential slippage of the flexible tube and are disposed annularly around the flexible tube. Each of the plurality of relief slots extends to the first end and extends a first distance inboard of the captured slots. Each of the plurality of relief slots is offset a second distance from the relief slots. The solid pipe has first and second ends. The first end has a second diameter less than the first diameter of the flexible tube. The first end is arranged and configured to telescopically slide within the first end of the flexible tube.

Pipe lap joint and methods

Constructions and methods are described for collecting particulate material from gas streams. In one specifically described arrangement, a region of depth media is oriented upstream of a second region of depth media. A surface loading media is positioned downstream from the second region of depth media. In an alternate embodiment, a further region of filter media is positioned downstream from the surface loading media.

Filtration arrangement

Filtration arrangement and method

Constructions and methods are described for collecting particulate material from gas streams. In one arrangement, there is an outer, air permeable cylindrical liner, and a first region of fibrous depth media positioned immediately adjacent to the air permeable liner. The first region of fibrous depth media includes non-pleated depth media having an average percent solidity within the construction of no greater than about 3%. The first region of fibrous depth media has an upstream side which is secured to the outer, air permeable liner.

Growing community of inventors

Dellwood, MN, United States of America

John T Herman