Filter system and particulate filter unit therefor
AssigneeStarfire Systems, Inc.
InventorWalter J. Sherwood, Jr.
Life of this patent
Estimating the term…
Abstract
The invention provides a filter system and particulate filter unit therefor. The filter system may act as a purifier and a muffler for heavy and light duty diesel vehicles. The invention includes one or more combination filter units that remove particulates and nitrogen oxides in successive passes before the gas exits. A particulate filter unit may be used that removes additional particulates.
Claims15
A filter system for removing soot from exhaust of an exhaust producing device, the filter system comprising:
- one or more attachable units for varying a length of the filter system, each attachable unit including:
- a particulate filter unit;
- and
- one or more combination particulate and nitrogen oxide filter units, wherein each combination filter unit includes:
- a housing;
- a particulate filter section positioned within the housing;
- and
- a nitrogen oxide filter section having a gas-impervious inner cylinder spaced within the particulate filter section and a nitrogen-oxide removing catalyst positioned within the inner cylinder.
A filter system for removing soot from exhaust of an exhaust producing device, the filter system comprising:
- one or more attachable units for varying a length of the filter system, each attachable unit including:
- a first stage unit housing;
- a plurality of concentrically arranged particulate filters within the first stage unit housing;
- a plurality of first passages passing adjacent at least one particulate filter and opened to a first end of the first unit stage housing;
- a plurality of second passages passing adjacent at least one particulate filter and opened to a second end of the first stage unit housing;
- whereby exhaust passes through a particulate filter as the exhaust moves from the first passages to the second passages;
- and
- one or more second stage units, each second stage unit including:
- a second stage unit housing;
- a particulate filter section positioned within the second stage unit housing;
- and
- a nitrogen oxide filter section having a gas-impervious inner cylinder spaced within the particulate filter section and a nitrogen-oxide removing catalyst positioned within the inner cylinder.
A filter system for removing soot from exhaust of an exhaust producing device, the filter system comprising:
- one or more attachable units for varying the size of the filter system, each attachable unit including:
- a particulate filter unit including
- a particulate filter unit housing;
- a plurality of concentrically arranged particulate filters within the particulate filter unit housing;
- a plurality of first passages passing adjacent at least one particulate filter and opened to a first end of the particulate filter unit housing;
- a plurality of second passages passing adjacent at least one particulate filter and opened to a second end of the particulate filter unit housing;
- whereby exhaust passes through a particulate filter as the exhaust moves from the first passages to the second passages;
- and
- one or more combination filter units each including:
- a combination filter unit housing having an outer shell and a coupling adapted to attach a unit to an adjacent unit;
- a particulate filter section positioned within the combination filter unit housing;
- a porous cylinder for supporting an inner portion of the particulate filter section;
- a gas-impervious inner cylinder spaced within the porous cylinder;
- and
- a nitrogen oxide filter positioned within the inner cylinder,
- wherein exhaust gases pass radially through the particulate filter section and longitudinally through the nitrogen oxide filter.
Dependencies are inferred from the claim text.