Passive secondary air muffler

Details Passive secondary air muffler Passive secondary air muffler

2008-03-07

2010-12-21

Enad, Elvin G (Department: 2832)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S231000, C181S262000, C060S302000

Reexamination Certificate

active

07854296

ABSTRACT:
A passive secondary air muffler for a small internal combustion engine. The secondary air muffler may include a venturi device and a catalytic converter. The venturi device may be in the form of a stamped sheet metal insert which, along with the outer muffler housing or shell, forms a secondary or auxiliary air intake device. The venturi device may also be formed from baffles separating an inlet chamber from an outlet chamber of the muffler. The secondary air intake device provides auxiliary or secondary air to the exhaust gas stream exiting the engine upstream of the catalytic converter to improve the efficiency of the catalytic converter. In an exemplary embodiment, the venturi device has a hemispherical cross-sectional shape or a circular cross-sectional shape taken along a plane substantially perpendicular to the direction of flow of the exhaust gas stream.

REFERENCES:
patent: 3656915 (1972-04-01), Tourtellotte
patent: 3872666 (1975-03-01), Bentley
patent: 4008570 (1977-02-01), Harada
patent: 4094645 (1978-06-01), Bailey
patent: 4231221 (1980-11-01), Mathner et al.
patent: 4388804 (1983-06-01), Bushmeyer
patent: 4693337 (1987-09-01), Timmermeister
patent: 4846301 (1989-07-01), Granath et al.
patent: 4867270 (1989-09-01), Wissmann et al.
patent: 4887427 (1989-12-01), Shinzawa et al.
patent: 4890690 (1990-01-01), Fischer et al.
patent: 4901815 (1990-02-01), Harwood et al.
patent: 4930678 (1990-06-01), Cyb
patent: 5174113 (1992-12-01), Deville
patent: 5177962 (1993-01-01), Hall et al.
patent: 5338903 (1994-08-01), Winberg
patent: 5339629 (1994-08-01), Winberg et al.
patent: 5351483 (1994-10-01), Riley et al.
patent: 5373119 (1994-12-01), Suzuki et al.
patent: 5451728 (1995-09-01), Chandler et al.
patent: 5521339 (1996-05-01), Despain et al.
patent: 5736690 (1998-04-01), Karlsson
patent: 5738184 (1998-04-01), Masuda et al.
patent: 5857327 (1999-01-01), Sato et al.
patent: 5866859 (1999-02-01), Karlsson et al.
patent: 5887424 (1999-03-01), Kuroshita
patent: 5996732 (1999-12-01), Burger et al.
patent: 6044926 (2000-04-01), Yamane et al.
patent: 6164066 (2000-12-01), Sakaguchi et al.
patent: 6170604 (2001-01-01), Menzel et al.
patent: 6250075 (2001-06-01), Funakoshi et al.
patent: 6341662 (2002-01-01), Karlsson
patent: 6393835 (2002-05-01), Stoll et al.
patent: 6478577 (2002-11-01), Maricic et al.
patent: 6789644 (2004-09-01), Mukaida
patent: 6955043 (2005-10-01), Schlossarczyk et al.
patent: 6978605 (2005-12-01), Chiba et al.
patent: 7051524 (2006-05-01), Kraft
patent: 7228935 (2007-06-01), Schlessmann
patent: 7296657 (2007-11-01), Ohno et al.
patent: 7357221 (2008-04-01), Maier
patent: 7413716 (2008-08-01), Mavinahally et al.
patent: 2001/0037912 (2001-11-01), Menzel
patent: 2002/0116919 (2002-08-01), Rosel et al.
patent: 2004/0154289 (2004-08-01), Schlossarczyk et al.
patent: 2005/0189167 (2005-09-01), Bozzi et al.
patent: 2005/0284140 (2005-12-01), Radel et al.
patent: 2006/0102420 (2006-05-01), Huber et al.
patent: 1 703 099 (2006-09-01), None
patent: 04027707 (1992-01-01), None
patent: 9-158722 (1997-06-01), None
patent: 96/12877 (1996-05-01), None
=Foreign patent document together with English language abstract.

Affiliated with

Also associated with

Rating

Passive secondary air muffler does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Passive secondary air muffler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Passive secondary air muffler will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4236835