Richard M Bloom

US Patent:

54096693, Apr 25, 1995

Filed:

Dec 17, 1993

Appl. No.:

8/168985

Inventors:

Mark P. Smith - Lino Lakes MN
Richard L. Bloom - Woodville WI
Thomas J. Conway - Little Canada MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

F01N 302
B01D 5334

US Classification:

422174

Abstract:

An electrically regenerable diesel particulate filter cartridge and filter comprising a slotted electrically resistive tube which, when energized, heats the filter media to a temperature sufficient to allow the trapped soot particulates to burn.

US Patent:

54531160, Sep 26, 1995

Filed:

Jun 13, 1994

Appl. No.:

8/258675

Inventors:

Edward M. Fischer - White Bear Lake MN
Richard L. Bloom - Woodville WI
Stephen M. Sanocki - Stillwater MN
Joel H. Sabean - Hudson WI

Assignee:

Minnesota Mining and Manufacturing Company - Saint Paul MN

International Classification:

B01D 2925
B01D 3516
B01D 4604

US Classification:

95278

Abstract:

A device and method for maintaining a clean gas stream includes a particulate filter comprising of support tube made from a formed textile. The formed textile is constructed from a continuous filament inorganic yarn and is porous to allow gas and particulates therein to pass through the support tube. A filtering element is disposed about the support tube to trap particulates in the exhaust gas. The formed textile which defines the support tube is relatively flexible in its natural state. To act as a supporting structure, the formed textile is made less flexible by the application of an inorganic binder. The natural flexibility of the formed textile minimizes the damaging effects of mechanical and thermal shock, while the inorganic binder stiffens the formed textile and allows the support tube to support itself and the filtering element thereon.

US Patent:

57024944, Dec 30, 1997

Filed:

Jun 3, 1996

Appl. No.:

8/656841

Inventors:

Thomas L. Tompkins - Woodbury MN
Ryan C. Shirk - Mendota Heights MN
Steven C. Schroeer - New Richmond WI
Richard P. Merry - White Bear Lake MN
Troy K. Ista - River Falls WI
Richard L. Bloom - Woodville WI

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B01D 2923
B01D 3920
B01D 4624

US Classification:

55498

Abstract:

An efficient, light-weight airbag inflation filter includes a gas-permeable, substantially rigid support tube having a plurality of uniform perforations therethrough. A filtering element formed from a continuous inorganic ceramic yarn or roving is helically cross-wound around the support tube to form one or more layers covering the perforations of the support tube. A wire screen, having openings therethrough smaller than the perforations in the support tube, is disposed between the filtering element and the support tube to act as a gas diffusion layer for the gases passing through the inflation filter.