James C Doherty

US Patent:

6525297, Feb 25, 2003

Filed:

Feb 16, 2001

Appl. No.:

09/788040

Inventors:

James E. Doherty - Barrington IL

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

B23K 916

US Classification:

21913731, 21913744, 21913761, 21913742

Abstract:

A MIG welding gun has a diffuser with an external thread and a frusto-conical back ramp. A nozzle assembly includes an insert with a back ramp and a thread that mates with the diffuser thread. The threads of the diffuser and insert have respective ramps that mate. A single turn of the nozzle assembly on the diffuser causes simultaneous engagement of the insert and diffuser back ramps and of the insert and diffuser thread ramps. Such engagement centers the nozzle to be concentric with the diffuser and also produces a wedging action that retains the nozzle assembly on the diffuser until a relatively substantial reverse torque is applied to the nozzle assembly. The nozzle front end has a narrow annulus, which reduces the amount of radiant heat from the welding arc that reaches the nozzle.

US Patent:

6755159, Jun 29, 2004

Filed:

Jan 20, 2003

Appl. No.:

10/347892

Inventors:

Joseph S. Adams - Salt Spring Island, CA
James E. Doherty - Barrington IL
James W. Robinson - Mundelein IL
Donald L. Van Erden - Wildwood IL

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

F02B 7104

US Classification:

123 46R

Abstract:

A new and improved valve assembly for incorporation within a dual combustion chamber system of a combustion-powered fastener-driving tool comprises a single valve mechanism which can operatively control the ingress of atmospheric air into the combustion chambers, the egress of combustion products out from the combustion chambers, and the fluid flows between the first and second combustion chambers attendant VENTING, MIXING, and FIRING stages of an overall combustion cycle. The valve mechanism may comprise either a rotary valve mechanism, a linear-rotary valve mechanism, or a linear valve mechanism.

US Patent:

6779493, Aug 24, 2004

Filed:

Jun 13, 2002

Appl. No.:

10/170736

Inventors:

James E. Doherty - Barrington IL
Joseph E. Fabin - Elmwood Park IL
Larry M. Moeller - Mundelein IL
James W. Robinson - Mundelein IL
Christian Paul Andre Ricordi - Bourg-les-Valence, FR
Richard Urban - Prospect Heights IL
Donald L. Van Erden - Wildwood IL

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

B25C 108

US Classification:

123 24A, 227 10

Abstract:

A mechanism for generating a flame jet has a volume formed of at least one vertical structure and two opposing horizontal structures. A rotatable fan is located within the volume, and is rotatable in a plane generally parallel to the planes of the horizontal structures. The mechanism also contains means for igniting a combustible gas which is contained within the volume, to propel a flame jet outside of the volume.

US Patent:

6815641, Nov 9, 2004

Filed:

Jan 7, 2002

Appl. No.:

10/041009

Inventors:

James E. Doherty - Barrington IL

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

B23K 900

US Classification:

21913731, 21913763, 219144

Abstract:

A welding system having a welding gun with a handle. The handle has a first end and a second end. The handle may be operable to receive a welding cable from a first and a second direction, respectively. The handle may be operable to position a trigger in any one of four quadrants of the handle. The handle may increase in cross-sectional area in each direction from a gripping portion located between the first and second ends towards the first and second ends.

US Patent:

6860243, Mar 1, 2005

Filed:

Jun 18, 2002

Appl. No.:

10/175537

Inventors:

James E. Doherty - Barrington IL, US
James W. Robinson - Mundelein IL, US
Richard Urban - Prospect Heights IL, US
Christian Paul Andre Ricordi - Bourg-les-Valence, FR
Donald L. Van Erden - Wildwood IL, US
Larry M. Moeller - Mundelein IL, US

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

F02B071/00

US Classification:

123 46R

Abstract:

A combustion chamber system, for use within a combustion-powered fastener-driving tool, comprises a dual combustion chamber system comprising a pre-combustion chamber and a final combustion chamber. The pre-combustion chamber is characterized by a high aspect ratio and has different obstacles fixedly incorporated therein for selectively retarding and enhancing the rate of burn and the rate of speed of the flame front propagating through the pre-combustion chamber. In addition, an obstacle, having a predetermined solid geometrical configuration is disposed within the final combustion chamber at a position immediately disposed downstream of a port fluidically interconnecting the pre-combustion chamber to the final combustion chamber so as to cause the flame front to diverge and split into multiple components which flow radially outwardly throughout the final combustion chamber.

US Patent:

6966478, Nov 22, 2005

Filed:

Nov 3, 2003

Appl. No.:

10/700082

Inventors:

Joseph S. Adams - Salt Spring Island, CA
James E. Doherty - Barrington IL, US
Donald L. Van Erden - Wildwood IL, US

Assignee:

Illinois Tool Works Inc - Glenview IL

International Classification:

B25C001/08

US Classification:

227 10, 227130, 123 46 SC

Abstract:

A gas combustion-powered apparatus includes a piston chamber housing a driveable piston, and a combustion chamber having a generally flat wall assembly and a cup-shaped wall defining at least one combustion volume therebetween. The cup-shaped wall is moveable in relation to the piston chamber, and has a generally flat portion opposing, and generally parallel to, the generally flat wall assembly. An ignition source is in operable relationship to the combustion volume, which can ignite a combustible gas within the combustion volume. The piston forms at least a portion of the generally flat wall assembly when the piston is in an undriven state.

US Patent:

7163134, Jan 16, 2007

Filed:

Jan 3, 2005

Appl. No.:

11/028450

Inventors:

Larry M. Moeller - Mundelein IL, US
Joseph E. Fabin - Elmwood Park IL, US
James E. Doherty - Barrington IL, US

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

B25C 1/04

US Classification:

227 8, 227 2, 227 10, 227130

Abstract:

A combustion-powered fastener-driving tool includes a combustion-powered power source, a workpiece contact element reciprocable relative to the power source between a rest position and a firing position, a control system operationally associated with the power source, a trigger connected to the control system providing operator interface with the control system. The control system is configured so that an operator may select between a sequential firing mode in which the trigger must be released between firings, and a repetitive cycle mode in which the trigger is continually depressed between firings. The trigger is connected to the control system so that at least one of the frequency and duration of pulling of the trigger converts the operating mode from the sequential mode to the repetitive cycle mode.

US Patent:

7201301, Apr 10, 2007

Filed:

Jan 3, 2005

Appl. No.:

11/028023

Inventors:

Larry M. Moeller - Mundelein IL, US
James E. Doherty - Mount Prospect IL, US

Assignee:

Illinois Tool Works Inc. - Glenview IL

International Classification:

B25C 1/04

US Classification:

227 8, 227 10, 227130, 123 46 SC

Abstract:

A combustion-powered fastener-driving tool includes a combustion-powered power source including a cylinder defining a path for a reciprocating piston and an attached driver blade, the piston reciprocating between a pre-firing position achieved prior to combustion and a bottom out position. Upon combustion in the power source, the cylinder includes at least one exhaust valve configured for releasing combustion gases from the cylinder. The at least one exhaust valve is dimensioned so that sufficient gas is released to reduce post-combustion pressure in the cylinder to approximately one atmosphere in the time available for the piston to travel past the at least one exhaust valve and return to the at least one exhaust valve.