Donaldson Comapny, Inc.

Peter A Betts

James C Rothman

Wayne M Wagner

Marty A Barris

Gary Ray Gillingham

Douglas E Flemming

Daniel T Risch

Fred H Wahlquist

Julian A Imes

David E Winnes

Erland D Anderson

Kelly C Robertson

John S Wiese

Charles O Reinhart

Darrell D Jahn

An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.

Muffler with catalytic converter arrangement; and method

Muffler with catalytic converter arrangement, and method

An air cleaner construction including a precleaner arrangement, a filter assembly and a scavenger arrangement is provided. In the precleaner arrangement, air directed into the air cleaner assembly is subjected to some particulate removal. The air from the precleaner arrangement is then directed into the filter assembly, for further particulate material. The scavenger arrangement is constructed and arranged to scavenge separated particulate material from both the precleaner arrangement and the filter assembly. A pulse jet cleaner assembly is provided to facilitate removal of particulate material from the filter assembly.

Air cleaner having scavenger arrangement

Air cleaner

An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.

Air cleaner having scavenger arrangement for precleaner and filter

Trap muffler apparatus with bypass around a trap core is disclosed. A preferred bypass arrangement utilizing a tubular shutter valve system is described. Forward or reverse regeneration are possible. Bypass to atmosphere without filtration is avoided with dual in-line traps or with the segmented trap and control of exhaust gases to traps not being regenerated.

Trap apparatus with bypass

A muffler-filter apparatus having a particulate trap using filter tubes with high temperature filter materials, like fiber in the form of yarn, woven yarn mat, or a non-woven, random array fiber mat, or various foams. Filter tubes have various structural configurations and are regenerated by axial propagation using ring heaters or stub rod heaters, by heating the entire length of the filter tube with a rod heater or some other full-length heater configuration. For regeneration, exhaust flow is bypassed using various valve configurations including a poppet valve, a shutter valve, or a tubular valve. Filter tube filters may also be self-regenerated by the heat from the exhaust gases as controlled by a throttle valve or on inclusion of fuel additives which lower particulate ignition temperature.

Trap apparatus with tubular filter element

A poppet valve assembly is provided. The preferred poppet valve assembly comprises a valve seat, valve head member and actuation arrangement. In the preferred embodiment, the valve head member comprises a flexible seal member and backing member, oriented such that the flexible seal member is positioned between the valve seat and the backing member. In use, the backing member is driven toward the valve seat, trapping the flexible seal member therebetween. The seal member engages the valve seat and is simultaneously deflected backward toward the backing member, which limits deformation of the seal member.

Valve assembly and use

An apparatus for skimming oil from the surface of a liquid is disclosed. The apparatus includes an endless belt which is formed from the loop portion of a loop and hook type fastener. The belt is supported to move in a path of travel with a portion of the belt disposed within the liquid. As the belt travels, oil is captured within the material of the belt. A scraping mechanism is provided for scraping an initial amount of oil off of the belt. Rollers are provided for squeezing out the remaining oil on the belt. Oil which is removed by the scrapers and the rollers is captured in a pan and collected.

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Prior Lake, MN, United States of America

Peter A Betts