David L Roth

US Patent:

6557833, May 6, 2003

Filed:

Oct 20, 2000

Appl. No.:

09/693576

Inventors:

David Roth - Fond du Lac WI

Assignee:

Briggs Stratton Corporation - Wauwatosa WI

International Classification:

F02M 116

US Classification:

261 341, 261DIG 8, 12317911

Abstract:

A priming system for an engine carburetor. The priming system includes a passageway having a first end in fluid flow communication with a variable volume chamber of a primer bulb and a second end in fluid flow communication with a fuel well. The second end of the passageway opens into the fuel well below a static priming fuel level which is in said fuel well and which at least partially extends into said passageway.

US Patent:

6990969, Jan 31, 2006

Filed:

Feb 23, 2004

Appl. No.:

10/784542

Inventors:

David Roth - Fond du Lac WI, US
James J. Dehn - Brookfield WI, US
Thomas G. Guntly - Hartford WI, US
Curtis Schultz - Grafton WI, US
Hisaya Iwata - Brookfield WI, US
Steven R. Schlosser - Fond du Lac WI, US
Travis Nickels - Milwaukee WI, US
Gregory D. Irwin - Eagle WI, US
Kenneth R. Breitenstein - Cedarburg WI, US
Steven A. Dethloff - Pewaukee WI, US

Assignee:

Briggs and Stratton Corporation - Wauwatosa WI

International Classification:

F02D 41/00

US Classification:

123676, 123437, 261 393

Abstract:

An automatic choke apparatus for use in an internal combustion engine. The choke apparatus includes a choke valve automatically operable in response to the speed of the engine, a thermally conductive assembly that conducts heat from exhaust gases produced by the engine, a thermally responsive member in thermal communication with the thermally conductive assembly, and a mechanism that moves in response to the thermally responsive member to cause the choke valve to remain in at least a partially open position during engine starting when the thermally responsive member senses a temperature above a predetermined temperature. The thermally conductive assembly at least partially surrounds the path of the exhaust gases.

US Patent:

7144000, Dec 5, 2006

Filed:

May 31, 2005

Appl. No.:

11/141657

Inventors:

David Roth - North Fond du Lac WI, US
James J. Dehn - Brookfield WI, US
Thomas G. Guntly - Hartford WI, US

Assignee:

Briggs & Stratton Corporation - Wauwatosa WI

International Classification:

F02M 1/10

US Classification:

261 393, 123437, 123676, 261 394, 261 52

Abstract:

An internal combustion engine including a carburetor. The internal combustion engine includes a choke valve disposed within the carburetor, and a choke lever interconnected with the choke valve for movement with the choke valve. The engine also includes a throttle valve disposed within the carburetor and a throttle lever interconnected with the throttle valve for movement therewith. An intermediate lever is disposed between the throttle lever and the choke lever for movement with the choke and throttle levers. In one embodiment, the engine includes a connecting link coupled between the choke and intermediate levers, the connecting link movable with movement of the choke lever such that movement of the choke lever is translated into movement of the intermediate lever.

US Patent:

8240639, Aug 14, 2012

Filed:

Sep 30, 2008

Appl. No.:

12/242853

Inventors:

David D. Roth - North Fond du Lac WI, US

Assignee:

Briggs & Stratton Corporation - Wauwatosa WI

International Classification:

F02M 1/08

US Classification:

261 52, 261 641, 261 646, 261 65

Abstract:

A carburetor configured for use with an internal combustion engine includes a body defining a passageway therein, a throttle lever including a cam surface, and a throttle valve positioned in the passageway and responsive to movement of the throttle lever. The throttle valve is configured to rotate about a first axis from a wide-open first position to a second position at least 50 degrees from the first position. The carburetor also includes a choke lever including a follower surface configured to be engaged by the cam surface and a choke valve positioned in the passageway and responsive to movement of the choke lever. One of the cam surface and the follower surface includes an arcuate segment having a constant radius centered on a second axis. The arcuate segment is sufficiently long such that the throttle valve is configured to move at least 15 degrees while the other of the cam surface and the follower surface engages the arcuate segment.

US Patent:

8573567, Nov 5, 2013

Filed:

Dec 14, 2012

Appl. No.:

13/715410

Inventors:

David D. Roth - North Fond du Lac WI, US

Assignee:

Briggs & Stratton Corporation - Wauwatosa WI

International Classification:

F02M 17/36
F02M 19/06

US Classification:

261 66, 261 721

Abstract:

A carburetor includes a body having an inner wall and an air/fuel passageway. An insert includes a base having a shape that closely matches the inner wall and a first tower having a first end disposed within the air/fuel passageway. A main circuit passageway is at least partially formed within the first tower and has a first end in fluid communication with the air/fuel passageway and a second end in fluid communication with the fuel bowl chamber. The main circuit passageway carries fuel from the fuel bowl chamber to the air/fuel passageway during engine operation when the throttle valve is opened. A second tower has a first end coupled to the base and a second end spaced away from the base. The first end of the first tower, the second end of the second tower, and the base are the sole engagement points between the insert and the body.

Address:

920 Lotus Trl, Menasha, WI 54952

VIN:

RFBU6A0377B001597

Make:

ISUZU

Model:

TROOPER 2DR WAGON RS 5-S

Year:

2007