ROBERT T MACVICAR
Engineers in Downers Grove, IL

7997248, Aug 16, 2011

Sep 4, 2008

12/204146

Raji Rexavier - Clarendon Hills IL, US
Robert T. MacVicar - Downers Grove IL, US

Electro-Motive Diesel Inc. - LaGrange IL

F02N 3/00

1231889

The present invention generally relates to a new valve guide for use in an exhaust valve system. Specifically, the invention is related to a valve guide that prevents acidic corrosion between the valve and the valve guide. The valve guide includes a number of contact portions, which engage the channel that is formed in the cylinder head near the exhaust port. The valve guide also includes a recess portion, situated in relation to a water jacket and between the contact portions. The recess portion and contact portions are sized and shaped to maintain the surface temperature of the valve guide to prevent condensation of acidic gases between the valve stem and the valve guide.

6247626, Jun 19, 2001

Sep 6, 2000

9/656234

Robert T. MacVicar - Downers Grove IL

Applied Tool Development Corporation - Elgin IL

B25C 108

227 10

An internal combustion powered tool, such as a nail or fastener driver, and a control system, spark source, and rotary valve for use in an internal combustion powered tool are disclosed. The tool may include, for example, a cylinder and a piston reciprocally moveable within the cylinder. A combustion chamber is defined at one end of the cylinder, with the piston comprising a portion of one end of the combustion chamber. The tool may have a fastener driver associated with the piston, and a magazine for feeding fasteners into registration with the driver. A fuel flow passageway extends between a fuel source and the combustion chamber, and a metering valve controls the flow of fuel to the combustion chamber. A spark source within the combustion chamber is provided for igniting the fuel, and an intake and exhaust valve that includes a pair of diametrically opposed apertures is provided. At least one fan external to the combustion chamber induces an intake of fresh air into the combustion chamber through one of the apertures and an exhaust of combustion products from the combustion chamber through the other aperture.

5873508, Feb 23, 1999

Aug 26, 1997

8/920160

Robert T. MacVicar - Downers Grove IL
J. Oscar Aparicio - Aurora IL
Tony J. Walter - Cary IL
John P. Walter - Cary IL
Anton J. Walter - Algonquin IL

Applied Tool Development Corporation - Elgin IL

B25C 108

227 10

An internal combustion powered tool, such as a nail or fastener driver, and a control system, spark source, and rotary valve for use in an internal combustion powered tool are disclosed. The tool may include, for example, a cylinder and a piston reciprocally moveable within the cylinder. A combustion chamber is defined at one end of the cylinder, with the piston comprising a portion of one end of the combustion chamber. The tool may have a fastener driver associated with the piston, and a magazine for feeding fasteners into registration with the driver. A fuel flow passageway extends between a fuel source and the combustion chamber, and a metering valve controls the flow of fuel to the combustion chamber. A spark source within the combustion chamber is provided for igniting the fuel, and an intake and exhaust valve that includes a pair of diametrically opposed apertures is provided. At least one fan external to the combustion chamber induces an intake of fresh air into the combustion chamber through one of the apertures and an exhaust of combustion products from the combustion chamber through the other aperture.

5752643, May 19, 1998

May 23, 1995

8/447787

Robert T. MacVicar - Downers Grove IL
John P. Walter - Cary IL
Anton J. Walter - Algonquin IL

Applied Tool Development Corporation - Elgin IL

B25C 108

227 10

An internal combustion powered tool, such as a nail or fastener driver, and a control system, spark source, and rotary valve for use in an internal combustion powered tool are disclosed. The tool may include, for example, a cylinder and a piston reciprocally moveable within the cylinder. A combustion chamber is defined at one end of the cylinder, with the piston comprising a portion of one end of the combustion chamber. The tool may have a fastener driver associated with the piston, and a magazine for feeding fasteners into registration with the driver. A fuel flow passageway extends between a fuel source and the combustion chamber, and a metering valve controls the flow of fuel to the combustion chamber. A spark source within the combustion chamber is provided for igniting the fuel, and an intake and exhaust valve that includes a pair of diametrically opposed apertures is provided. At least one fan external to the combustion chamber induces an intake of fresh air into the combustion chamber through one of the apertures and an exhaust of combustion products from the combustion chamber through the other aperture.

2013004, Feb 28, 2013

Aug 29, 2012

13/597818

Robert T. MacVicar - Downers Grove IL, US
Brent Valesano - Des Plaines IL, US
Frank J. Kalemba - Chicago IL, US

F02M 69/46

123452

A fuel quill passageway assembly for an engine is disclosed. The engine includes a head pot; a cylinder head having an outer wall situated adjacent to the head pot, an inner wall, and a water jacket situated between the outer wall and the inner wall; and a fuel injector situated adjacent to the inner wall. The assembly may include a first sleeve extending through an aperture in the head pot toward an aperture in the outer wall of the cylinder head. The assembly may also include a second sleeve extending from the aperture in the outer wall of the cylinder head, through the water jacket, to an aperture in the inner wall of the cylinder head. Additionally, the assembly may include a seal joining the second sleeve to the first sleeve.

2011009, Apr 28, 2011

Oct 28, 2010

12/914366

Robert T. MacVicar - Downers Grove IL, US
Raji Rexavier - Clarendon Hills IL, US

F01L 1/22

123 9053

In accordance with the present invention, a lash adjuster is provided for minimizing stress on a valve train system in the event of its failure. Specifically, the present invention lash adjuster is for use in a valve train system having a cam for actuating the opening and closing of a valve, where the cam has a select size and shape for determining the velocity or acceleration of the valve's opening and closing. The present invention lash adjuster generally comprises a housing having a base and a plunger positioned within the housing at a select axial clearance from the base. This clearance is generally sized and shaped such that, in the event of lash adjuster failure, a select maximum velocity or acceleration of valve opening and closing is maintained, thereby minimizing stress on the valve train system.

8413626, Apr 9, 2013

Feb 6, 2009

12/366894

Robert T. MacVicar - Downers Grove IL, US

Electro-motive Diesel, Inc. - LaGrange IL

F01L 1/14

123 9052, 123 9053, 123 9059

The present invention relates to a lash adjuster including a ball retainer having a generally conical chamber for situating a ball near the base of the lash adjuster housing. The chamber has both an external and internal shoulder for engaging a plunger spring and a ball spring, respectively. The chamber may further define at least one aperture near its apex and at least one aperture near its base to facilitate oil flow through the lash adjuster.