Patents by Inventor Derek T. Dreischarf
Derek T. Dreischarf 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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Patent number: 6920818Abstract: A vehicle braking system vacuum booster tandem power piston connection design such that the primary piston and the secondary piston are positioned together forming the tandem power piston. A connection design that provides direct alignment between the primary piston and secondary piston upon assembly and also provides an airtight seal between the primary piston and the secondary piston when assembling the tandem power piston.Type: GrantFiled: April 8, 2003Date of Patent: July 26, 2005Assignee: Delphi Technologies, Inc.Inventors: Michel J. Vermoesen, Ryan M. Elking, Patrick T. MacLellan, Derek T. Dreischarf
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Patent number: 6912946Abstract: The present invention includes a system for providing an improved controlled airflow within a vacuum booster system. The system includes a vacuum booster assembly having a primary chamber and a secondary chamber, and an outer tube having a first end and a second end, the first end in communication with the secondary chamber of the vacuum booster assembly. The system additionally includes an airflow control assembly operably coupled to the second end of the outer tube, and an inner tube, concentric to the outer tube, having a first end and a second end, the first end operably coupled to the airflow control assembly, the second end in communication with the primary chamber of the vacuum booster assembly. In the system, air flows from the primary chamber of the vacuum booster assembly to the airflow control assembly within the inner tube and air flows from the airflow control assembly to the secondary chamber of the vacuum booster assembly within the outer tube.Type: GrantFiled: May 28, 2003Date of Patent: July 5, 2005Assignee: Delphi Technologies, Inc.Inventors: Timothy A. Haerr, Gary C. Fulks, Ryan M. Elking, Derek T. Dreischarf, Patrick T. MacLellan
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Publication number: 20040237770Abstract: The present invention includes a system for providing an improved controlled airflow within a vacuum booster system. The system includes a vacuum booster assembly having a primary chamber and a secondary chamber, and an outer tube having a first end and a second end, the first end in communication with the secondary chamber of the vacuum booster assembly. The system additionally includes an airflow control assembly operably coupled to the second end of the outer tube, and an inner tube, concentric to the outer tube, having a first end and a second end, the first end operably coupled to the airflow control assembly, the second end in communication with the primary chamber of the vacuum booster assembly. In the system, air flows from the primary chamber of the vacuum booster assembly to the airflow control assembly within the inner tube and air flows from the airflow control assembly to the secondary chamber of the vacuum booster assembly within the outer tube.Type: ApplicationFiled: May 28, 2003Publication date: December 2, 2004Applicant: DELPHI TECHNOLOGIES INC.Inventors: Timothy A. Haerr, Gary C. Fulks, Ryan M. Elking, Derek T. Dreischarf, Patrick T. Maclellan
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Publication number: 20040200351Abstract: A vehicle braking system vacuum booster tandem power piston connection design such that the primary piston and the secondary piston are positioned together forming the tandem power piston. A connection design that provides direct alignment between the primary piston and secondary piston upon assembly and also provides an airtight seal between the primary piston and the secondary piston when assembling the tandem power piston.Type: ApplicationFiled: April 8, 2003Publication date: October 14, 2004Applicant: DELPHI TECHNOLOGIES INC.Inventors: Michel J. Vermoesen, Ryan M. Elking, Patrick T. MacLellan, Derek T. Dreischarf
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Publication number: 20040134295Abstract: An improved method and apparatus for mounting a brake booster on a panel with an adapter are provided, through the use of a boot having a generally cup-shaped wall defining a flange for sealing a juncture between the brake booster and the adapter, a sealing lip for sealing a juncture between the boot and the adapter, and a hole for passage of the push rod, with the hole having a periphery for sealing the juncture between the boot and the push rod. The boot includes an air intake extending through the wall of the boot between the flange and the sealing lip.Type: ApplicationFiled: January 13, 2003Publication date: July 15, 2004Applicant: DELPHI TECHNOLOGIES INC.Inventors: Michel J. Vermoesen, Ryan M. Elking, Patrick T. MacLellan, Derek T. Dreischarf, Roger S. Sexton
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Patent number: 6758129Abstract: A collapsible push rod for a brake booster in a vehicle is provided, having first and second telescoping members, and retractable locking means for selectively locking the first and second members together against telescoping. During a frontal impact collision, the members telescope into one another to shorten the length of the push rod and compensate for rearward movement of the brake booster and forward movement of the driver. The push rod is operable in the collapsed state. The push rod is also re-settable after the collision, and includes features for returning the push rod to its normal un-telescoped length following the collision, if the push rod is not damaged in the collision. The retractable locking means includes an electrically actuated solenoid for selectively locking and unlocking the first and second members against telescoping, in response to an electrical signal applied to the solenoid.Type: GrantFiled: April 26, 2002Date of Patent: July 6, 2004Assignee: Delphi Technologies, Inc.Inventors: Derek T. Dreischarf, Michel J. Vermoesen
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Patent number: 6719477Abstract: A lightweight spacer for mounting a vacuum brake booster on a panel provides integral flexible sealing lips to seal the interfaces between the panel, spacer, and booster. Integral retaining tabs are provided for holding the spacer in place on the booster during shipping and installation of the booster. Tubular inserts within the spacer are retained and cushioned against rattling by a thin web of material extending over the end of the insert.Type: GrantFiled: November 2, 2001Date of Patent: April 13, 2004Assignee: Delphi Technologies, Inc.Inventors: Michel J. Vermoesen, Derek T. Dreischarf
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Patent number: 6679161Abstract: A spacer for separating a brake booster from a wall comprises a support and a boot. The support is disposed between the booster and the wall, and has a breather port. The boot is integral with the support, and has a generally conical shape tapering from the wall toward a push rod of the booster.Type: GrantFiled: December 12, 2001Date of Patent: January 20, 2004Assignee: Delphi Technologies, Inc.Inventors: Michel J. Vermoesen, Derek T. Dreischarf
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Publication number: 20030200863Abstract: A collapsible push rod for a brake booster in a vehicle is provided, having first and second telescoping members, and retractable locking means for selectively locking the first and second members together against telescoping. During a frontal impact collision, the members telescope into one another to shorten the length of the push rod and compensate for rearward movement of the brake booster and forward movement of the driver. The push rod is operable in the collapsed state. The push rod is also re-settable after the collision, and includes features for returning the push rod to its normal un-telescoped length following the collision, if the push rod is not damaged in the collision. The retractable locking means includes an electrically actuated solenoid for selectively locking and unlocking the first and second members against telescoping, in response to an electrical signal applied to the solenoid.Type: ApplicationFiled: April 26, 2002Publication date: October 30, 2003Applicant: DELPHI TECHNOLOGIES INC.Inventors: Derek T. Dreischarf, Michel J. Vermoesen
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Patent number: 6584883Abstract: A pneumatic brake booster includes a generally cylindrical shaped piston. The piston has a first piston end and a second piston end and defines a chamber at the first piston end and a piston bore at the second piston end separated by an air flow aperture. The piston bore includes a plunger aperture located at the second piston end. A plunger includes a first plunger end and a second plunger end and is movable between first and second positions. The second plunger end is located within the plunger aperture. An air valve has a first valve end and a valve second end and is movable between first and second positions and defines a valve bore for receiving the first plunger end. A collapsing spring is located within the valve bore and is adapted to couple the plunger and the air valve.Type: GrantFiled: October 9, 2001Date of Patent: July 1, 2003Assignee: Delphi Technologies, Inc.Inventors: Derek T. Dreischarf, Michael W. Fanelli
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Publication number: 20030106426Abstract: A spacer for separating a brake booster from a wall comprises a support and a boot. The support is disposed between the booster and the wall, and has a breather port. The boot is integral with the support, and has a generally conical shape tapering from the wall toward a push rod of the booster.Type: ApplicationFiled: December 12, 2001Publication date: June 12, 2003Applicant: DELPHI TECHNOLOGIES INC.Inventors: Michel J. Vermoesen, Derek T. Dreischarf
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Publication number: 20030086760Abstract: A lightweight spacer for mounting a vacuum brake booster on a panel provides integral flexible sealing lips to seal the interfaces between the panel, spacer, and booster. Integral retaining tabs are provided for holding the spacer in place on the booster during shipping and installation of the booster. Tubular inserts within the spacer are retained and cushioned against rattling by a thin web of material extending over the end of the insert.Type: ApplicationFiled: November 2, 2001Publication date: May 8, 2003Applicant: DELPHI TECHNOLOGIES INC.Inventors: Michel J. Vermoesen, Derek T. Dreischarf
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Publication number: 20030066416Abstract: A pneumatic brake booster includes a generally cylindrical shaped piston. The piston has a first piston end and a second piston end and defines a chamber at the first piston end and a piston bore at the second piston end separated by an air flow aperture. The piston bore includes a plunger aperture located at the second piston end. A plunger includes a first plunger end and a second plunger end and is movable between first and second positions. The second plunger end is located within the plunger aperture. An air valve has a first valve end and a valve second end and is movable between first and second positions and defines a valve bore for receiving the first plunger end. A collapsing spring is located within the valve bore and is adapted to couple the plunger and the air valve.Type: ApplicationFiled: October 9, 2001Publication date: April 10, 2003Applicant: Delphi Technologies, Inc.Inventors: Derek T. Dreischarf, Michael W. Fanelli