David B Roth

US Patent:

6889634, May 10, 2005

Filed:

Apr 16, 2004

Appl. No.:

10/826104

Inventors:

David B. Roth - West Bloomfield MI, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F01M001/02

US Classification:

123 4144, 123 4165, 123565, 123 9012, 123196 R, 180442, 623231, 290 1 R

Abstract:

A method of providing hydraulic pressure for mechanical work from an engine lubricating system in an internal combustion engine by supplying oil to an engine lubrication gallery for lubricating the engine and at least one variable oil demand accessory. Each of the variable oil demand accessories have individual pressure regulators. The output of the variable displacement pump is regulated to the sum of fluid flow required by the engine lubricating system and the demand for fluid generated by the individual pressure regulators on each of the engine accessories, regardless of the engine output.

US Patent:

7171936, Feb 6, 2007

Filed:

Oct 23, 2003

Appl. No.:

10/691954

Inventors:

Wolfgang Rein - Milford MI, US
David Roth - West Bloomfield MI, US
Jonathan Douglas - Russellville TN, US

Assignee:

Mahle Technology, Inc. - Farmington Hills MI

International Classification:

F02F 3/00
F02F 3/10

US Classification:

1231934, 29888048

Abstract:

The present invention relates to a piston adapted for reciprocal movement within the cylinders of an internal combustion engine. The piston includes a body having a crown formed at the uppermost margins of the body and a skirt, depending from the crown, adapted for relative sliding motion with respect to the cylinder. The piston further includes a coating bonded to the piston skirt so as to be juxtaposed between the skirt and the cylinder. The coating has a plurality of recesses formed thereon so as to define a predetermined pattern of recesses on the surface of the skirt that retains lubricant between the skirt and the cylinder wall. The coating may also direct lubricant along the outer circumference of the piston skirt during reciprocal movement of the piston within a cylinder. A method of applying the coating to the piston skirt is also disclosed.

US Patent:

8630787, Jan 14, 2014

Filed:

Jul 6, 2010

Appl. No.:

12/830834

Inventors:

John Shutty - Clarkston MI, US
Volker Joergl - Breitenfurt, AT
Volker Mueller - Vendersheim, DE
David B. Roth - Groton NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

G06F 19/00
F02M 25/07
F02B 47/08
F02B 33/44

US Classification:

701108, 12356821, 606052

Abstract:

Methods and products for controlling exhaust gas recirculation.

US Patent:

20040107922, Jun 10, 2004

Filed:

Dec 6, 2002

Appl. No.:

10/310781

Inventors:

David Roth - West Bloomfield MI, US

Assignee:

Daimler Chrysler Corporation

International Classification:

F01P007/14

US Classification:

123/041100

Abstract:

A dual temperature control system as part of an engine cooling system. In one aspect, a valve is regulated as a function of engine load and disposed in a by-pass line between the radiator and the coolant pump. The valve is designed to normally block the by-pass line, but permits coolant to by-pass the thermostat and be conveyed from the radiator to the engine when the load of the engine approaches a wide-open-throttle condition. In another aspect, both high-temperature and low-temperature thermostats are employed and a normally closed valve is actuated when the load of the engine approaches a wide-open-throttle condition to permit coolant to be conveyed through the low-temperature thermostat and on to the engine.

US Patent:

20090044788, Feb 19, 2009

Filed:

Jun 4, 2008

Appl. No.:

12/132837

Inventors:

John Shutty - Clarkston MI, US
Philip S. Keller - Clarkston MI, US
Thomas Grissom - Dexter MI, US
David White - Dryden NY, US
David B. Roth - Groton NY, US

Assignee:

BorgWarner Inc. - Auburn Hills MI

International Classification:

F02B 33/00
F02M 37/04

US Classification:

1235591, 123495

Abstract:

One implementation of an air boost system for an engine includes a boost device and an accumulator adapted to store pressurized fluid and selectively provide pressurized fluid to the boost device. A pump may deliver fluid under pressure to one or both of the accumulator and the boost device in at least some operating conditions. A first control valve may be disposed between the pump and the accumulator to control fluid flow to the accumulator, and a bypass may be provided between the pump and the first control valve. The bypass may, in at least some operating conditions, permit at least some of the pressurized fluid from the pump to bypass the accumulator and be delivered to the boost device. In one form, the accumulator is carried by the boost device in a compact unit.

US Patent:

20110276204, Nov 10, 2011

Filed:

Aug 15, 2008

Appl. No.:

12/673286

Inventors:

John Shutty - Clarkston MI, US
David B. Roth - Groton NY, US
Volker Joergl - Breitenfurt, AT
Robert Czamowski - Oxford MI, US

Assignee:

BORGWARNER INC. - Auburn Hills MI

International Classification:

G06F 19/00
B62D 5/06
B60L 15/00

US Classification:

701 22, 701 99, 701 41, 180 65265, 903930

Abstract:

According to one implementation of an engine system, a power device is selectively actuated to provide energy to a storage device. Energy from the storage device is selectively provided to a boost assist device to supplement the normal energy supply to a boost device and enable an increased power output of the engine in at least certain engine or vehicle operating conditions. In one form, the power device may be a source of electrical energy and the storage device is capable of storing an electrical charge. In another form, the power device is a fluid pump and the storage device is capable of storing pressurized fluid. Various methods may be employed to control operation of the power device and energy storage in the storage device.

US Patent:

52069508, Apr 27, 1993

Filed:

Jul 8, 1991

Appl. No.:

7/767557

Inventors:

Michael E. Geary - Los Gatos CA
Umang P. Gupta - San Mateo CA
David W. Roth - Mountain View CA
Donal B. Scott - Santa Clara CA

Assignee:

Gupta Technologies, Inc. - Menlo Park CA

International Classification:

G06F 1540

US Classification:

395600

Abstract:

A system and method for specifying a computer program. The specified computer program comprises a set of selected program objects, represented by a corresponding set of outline items arranged in a multilevel outline format. These outline items collectively and completely denote the nature and operation of the specified computer program. Each outline item has a set of predefined characteristics, including a set of required children, and a set of optional children, comprising outline items that must/may be included at the next lower outline level when this outline item is used in a computer program. For each outline item in a computer program an expansion denoting flag denotes whether the corresponding outline item has children and whether the display of those children has been enabled. A selected contiguous portion of the multilevel outline is shown on the computer system's display device, showing only outline items whose display is enabled by corresponding expansion display denoting flags. A user interface enables the user to enable and disable expansion of any specified outline items.

US Patent:

20190275308, Sep 12, 2019

Filed:

Feb 25, 2019

Appl. No.:

16/284933

Inventors:

- Hayward CA, US
Gary STACEY - Cambridge, GB
Alexander David NORMAN - Cambridge, GB
Congyi HUANG - Cambridge, GB
Timothy Charles FREARSON - Hartley Wintney, GB
Charles Frazer KILBY - Cambridge, GB
Patrick H. RUANE - Dublin CA, US
Alan J. LEVY - Bellevue WA, US
Kevin W. GELSTON - Moraga CA, US
Jennifer DARMOUR - Seattle WA, US
Jenny E. HAPGOOD - Tacoma WA, US
David Evans ROTH - Issaquah WA, US
Ronald A. OVERBECK - Winthrop WA, US
Ling-Kang TONG - Hayward CA, US

Assignee:

Chrono Therapeutics Inc. - Hayward CA

International Classification:

A61M 35/00
A61M 5/145
A61M 5/168
A61M 5/142

Abstract:

A two-part bioactive agent delivery system, the system including a disposable part comprising an agent reservoir, a bolus chamber, the volume of the bolus chamber being less than the volume of the agent reservoir, an agent outlet, and a valve having a first position communicating the agent reservoir with the bolus chamber and a second position communicating the bolus chamber with the outlet; and a reusable part including a valve driver, a power source and control electronics, the control electronics being adapted to control the valve driver to actuate the valve to deliver bioactive agent from the agent reservoir to the agent outlet; the system further having a spring extending between the agent reservoir piston and a surface of the reusable part or of the disposable part to pressurize the agent reservoir when the spring is compressed and the agent reservoir contains a quantity of bioactive agent.