Patents by Inventor Gregory P. Campau
Gregory P. Campau has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20200216052Abstract: A brake system includes a fluid reservoir, a brake pedal unit, a first source of pressurized fluid, a pump assembly, and a valve for selectively closing off communication between an inlet of the pump assembly and the brake pedal unit. The brake pedal unit includes a housing and a pair of pistons slidably disposed in the housing. The pair of pistons are movable to generate brake actuating pressure at first and second outputs for actuating at least one wheel brake within a first circuit and a second circuit, respectively. The first source of pressurized fluid actuates the at least one wheel brake under normal braking conditions. The pump assembly actuates the at least one wheel brake under a manual push-through mode.Type: ApplicationFiled: December 16, 2019Publication date: July 9, 2020Applicant: ZF Active Safety US Inc.Inventor: Gregory P. Campau
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Patent number: 10272891Abstract: A vehicle brake system includes a dual acting plunger assembly. The dual acting plunger assembly comprises a housing, an anti-rotation tube secured to a ball screw assembly, and a torque coupler. The torque coupler is attached between the housing and anti-rotation tube, wherein the torque coupler allows rotation between the housing and the anti-rotation tube.Type: GrantFiled: July 28, 2016Date of Patent: April 30, 2019Assignee: Kelsey-Hayes CompanyInventors: Daniel Ryan Malwitz, Blaise J. Ganzel, Gregory P. Campau
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Publication number: 20180029575Abstract: A vehicle brake system includes a dual acting plunger assembly. The dual acting plunger assembly comprises a housing, an anti-rotation tube secured to a ball screw assembly, and a torque coupler. The torque coupler is attached between the housing and anti-rotation tube, wherein the torque coupler allows rotation between the housing and the anti-rotation tube.Type: ApplicationFiled: July 28, 2016Publication date: February 1, 2018Applicant: Kelsey-Hayes CompanyInventors: Daniel Ryan Malwitz, Blaise J. Ganzel, Gregory P. Campau
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Patent number: 7987765Abstract: A hydraulic control system for high flow applications in motor vehicles, in particular for active wheel suspensions and active steering arrangements, includes at least one passive high flow valve which is controlled hydraulically by at least one low flow valve.Type: GrantFiled: September 5, 2005Date of Patent: August 2, 2011Assignee: Lucas Automotive GmbHInventors: Harry A. Hunnicutt, Gregory P. Campau, Dirk Kesselgruber
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Publication number: 20080257434Abstract: A hydraulic control system for high flow applications in motor vehicles, in particular for active wheel suspensions and active steering arrangements, includes at least one passive high flow valve which is controlled hydraulically by at least one low flow valve.Type: ApplicationFiled: September 5, 2005Publication date: October 23, 2008Inventors: Harry A. Hunnicutt, Gregory P. Campau, Dirk Kesselgruber
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Patent number: 6860569Abstract: An improved electro-hydraulic brake system having an electrically powered normal source of pressurized hydraulic brake fluid, and a manually powered backup source of pressurized hydraulic brake fluid to all four of the vehicle brakes in the event of failure of the normal source. During normal braking, fluid from the backup source is redirected from the vehicle brakes to a pedal simulator. The brake system of the invention further diverse arrangements for providing braking in the event of a failure of the normal source of pressurized fluid. The brake circuit for the front wheels are provided with relatively low cost fluid separator units, while the rear brake circuit is not.Type: GrantFiled: May 23, 2003Date of Patent: March 1, 2005Assignee: Kelsey-Hayes CompanyInventors: Gregory P. Campau, Edward Nelson Fuller
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Patent number: 6533366Abstract: Hydraulic or electro-hydraulic braking systems which include at least one wheel braking device and micro-machined technology, such as microvalves, are described herein. The use of the microvalves helps to eliminate audible noise produced in the hydraulic systems as well as allows for reduced package size of the system. In particular, many of the braking systems described herein have Anti-lock Braking System (ABS) capabilities, and as such employ apply microvalves, dump microvalves and changeover microvalves. The microvalves may be digitally or proportionally controlled for selectively controlling the pressure supplied to the wheel brake cylinders.Type: GrantFiled: February 1, 2000Date of Patent: March 18, 2003Assignee: Kelsey-Hayes CompanyInventors: Richard J. Barron, Edward N. Fuller, Gerald M. Sivulka, Gregory P. Campau, Charles Darnell
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Patent number: 6206482Abstract: An electronic brake management system for controlling the application of fluid pressure to the brakes associated with wheels on a vehicle is disclosed. The system comprises a plurality of hydraulic valves for controlling the application of fluid to the brakes and a plurality of valve drivers for controlling the valves in accordance with respective electrical control signals for the plurality of valves. The system further includes a valve pulse width modulation controller for generating the respective electrical valve control signals applied to the valve drivers. The electrical valve control signals from the pulse width modulation controller are modulated to reduce the amount of electrical power supplied by the individual ones of the electrical signals once the valve associated with the one of the electrical signals has changed its opening to a desired position.Type: GrantFiled: November 2, 1999Date of Patent: March 27, 2001Assignee: Kelsey-Hayes CompanyInventors: Gregory P. Campau, Mark S. Luckevich, Edward R. Hornback, John D. Cotner, Clark E. Lowman
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Patent number: 6019437Abstract: Hydraulic or electro-hydraulic braking systems which include at least one wheel braking device and micro-machined technology, such as microvalves, are described herein. The use of the microvalves helps to eliminate audible noise produced in the hydraulic systems as well as allows for reduced package size of the system. In particular, many of the braking systems described herein have Anti-lock Braking System (ABS) capabilities, and as such employ apply microvalves, dump microvalves and changeover microvalves. The microvalves may be digitally or proportionally controlled for selectively controlling the pressure supplied to the wheel brake cylinders.Type: GrantFiled: May 29, 1997Date of Patent: February 1, 2000Assignee: Kelsey-Hayes CompanyInventors: Richard J. Barron, Edward N. Fuller, Gerald M. Sivulka, Gregory P. Campau, Charles Darnell
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Patent number: 5941608Abstract: An improved electro-hydraulic brake system having features for improving the pedal feel of the system, while further having design features which contribute to the economy of manufacture of certain components of the system. The system provides for an electrically powered normal source of pressurized hydraulic brake fluid, and a manually powered backup source of pressurized hydraulic brake fluid to the vehicle brakes in the event of failure of the normal source. During normal braking, fluid from the backup source is redirected from the vehicle brakes to a pedal simulator. The pedal simulator preferably includes arrangements of spring loaded pistons, expansion volumes, and damping orifices, together with valves selectively controlling the flow of fluid to and from the pedal simulator which provides for an improved pedal feel during vehicle braking.Type: GrantFiled: March 7, 1997Date of Patent: August 24, 1999Assignee: Kelsey-Hayes CompanyInventors: Gregory P. Campau, Andrew W. Kingston, Robert L. Ferger, Thomas Weigert, Salvatore Oliveri, Blaise J. Ganzel, Mark S. Luckevich
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Patent number: 5017095Abstract: A bearing comprising a body of polymeric material and a reinforcing member embedded in the body and having a plurality of perforations throughout which are affixed in the reinforcing member. The polymeric material extends through the perforations. The bearing may have various configurations. The reinforcing member may comprise a thin metal sheet having perforations therein, a woven metal body defining the perforations, or adjacent woven metal bodies each having perforations. In one form, a backing member is adhered to on one side of said reinforcing member. Where a thin metal sheet is used, it has a roughened surface finish at the interface with the plastic body.Type: GrantFiled: July 17, 1989Date of Patent: May 21, 1991Assignee: Vickers, IncorporatedInventors: Roy T. Burgess, Gregory P. Campau, Leslie M. Claar, Robert C. Hodges, Douglas G. Snow, Roy Taylor
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Patent number: 4862789Abstract: A variable speed pressure energy translating device including a plurality of axially extending pistons and associated cylinders and a yoke engaged by the pistons and pivoted on a transverse axis for varying the displacement thereof, and a housing having spaced saddle bearing seats. The yoke has spaced complementary saddle bearing engaging portions and an arcuate bearing is seated in each of said seats. Each bearing comprises an arcuate body of polymeric material and an arcuate reinforcing member embedded in the body and having a plurality of perforations throughout which are fixed in the reinforcing member with the polymeric material extending through said perforations.Type: GrantFiled: February 1, 1988Date of Patent: September 5, 1989Assignee: Vickers, IncorporatedInventors: Roy T. Burgess, Gregory P. Campau, Leslie M. Claar, Robert C. Hodges, Douglas G. Snow, Roy Taylor
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Patent number: RE44677Abstract: An improved electro-hydraulic brake system having features for improving the pedal feel of the system, while further having design features which contribute to the economy of manufacture of certain components of the system. The system provides for an electrically powered normal source of pressurized hydraulic brake fluid, and a manually powered backup source of pressurized hydraulic brake fluid to the vehicle brakes in the event of failure of the normal source. During normal braking, fluid from the backup source is redirected from the vehicle brakes to a pedal simulator. The pedal simulator preferably includes arrangements of spring loaded pistons, expansion volumes, and damping orifices, together with valves selectively controlling the flow of fluid to and from the pedal simulator which provides for an improved pedal feel during vehicle braking.Type: GrantFiled: August 24, 2001Date of Patent: December 31, 2013Assignee: Kelsey-Hayes CompanyInventors: Gregory P. Campau, Andrew W. Kingston, Robert L. Ferger, Thomas Weigert, Salvatore Oliveri, Blaise J. Ganzel, Mark S. Luckevich