John D Stark

US Patent:

20120313328, Dec 13, 2012

Filed:

Jun 8, 2012

Appl. No.:

13/492143

Inventors:

Richard M. Larson - Des Plaines IL, US
David C. Rupp - Grayslake IL, US
Reynaldo Fernandez - Chicago IL, US
John Stark - Hanover Park IL, US
Gerald A. Greca - Carleton MI, US

International Classification:

F16J 15/32

US Classification:

277549

Abstract:

A shaft seal assembly for establishing a liquid-tight seal between a steering knuckle and an axle shaft is provided. The shaft seal assembly includes an outer case and a first elastomeric member attached to one another. The elastomeric member has a castellated feature including a plurality of projections extending in a radially outward direction and separated from one another by a plurality of grooves. When the shaft seal assembly is installed in the steering knuckle, a cavity is presented between the steering knuckle and the first elastomeric member. Together, the grooves and cavity allow air to flow from a hub on one side of the seal assembly to a vacuum port in the steering knuckle. The cavity extends circumferentially around the seal assembly, and thus, air flow from the hub to the vacuum port is not dependent upon the orientation of the seal assembly relative to the steering knuckle.

US Patent:

55792995, Nov 26, 1996

Filed:

Dec 16, 1994

Appl. No.:

8/357002

Inventors:

Richard A. Halter - Warren MI
Robert J. Randel - Walled Lake MI
Ronald F. Hormel - Clinton Township MI
John Stark - Ann Arbor MI

Assignee:

Chrysler Corporation - Auburn Hills MI

International Classification:

H04J 1500
H04L 12413

US Classification:

370 9

Abstract:

A link apparatus in a node of a multinode, collision-resolution, multiplexing communications system connected between a microcontroller (MCU) that receives measurand data from an input device such as a sensor and an integrated driver and receiver (IDR) for assuming some of the functions of the MCU in delivering and receiving messages to and from a single-wire bus communications network. The MCU contains firmware for converting the measurand data into data bytes, the link apparatus and the MCU contain circuits for effecting a SPI transfer and the link apparatus contains additional circuits for converting each bit of the message bytes into variable pulse width modulated (VPWM) bits. The VPWM bits get converted into J1850 symbols before being placed on a single- wire communications bus. Circuits are provided in the link apparatus for checking arbitration of the protocol and data symbols communicated over the bus.

US Patent:

53884671, Feb 14, 1995

Filed:

Sep 9, 1992

Appl. No.:

7/942519

Inventors:

John Jereb - Dundee IL
John Stark - Bartlett IL
Gerald Proszek - Buffalo Grove IL

Assignee:

Tricor Systems, Inc. - Elgin IL

International Classification:

G01L 500

US Classification:

73862381

Abstract:

An apparatus and method for testing a switch having an actuating plunger, the switch undergoing a switch event in response to the actuation of the actuating plunger includes a switch nest and clamp assembly for holding the switch at a precise and predetermined location and a motor driven plunger actuator for applying force to the plunger thereby to actuate the switch. The switch test station further includes a pressure sensor coupled to the plunger actuator which measures the force being applied to the plunger during switch actuation. An electrical sensor couples to the switch nest and measures the electrical characteristics of the switch while a microcomputer responsive to the pressure sensor and the electrical sensor determines the mechanical displacement of the actuating plunger at a switch event.

US Patent:

40892263, May 16, 1978

Filed:

Mar 10, 1977

Appl. No.:

5/776273

Inventors:

Irvin R. Kraska - Lansing IL
John Stark - Bartlett IL
Wieslaw L. Lichodziejewski - Schaumburg IL

Assignee:

Gard, Inc. - Niles IL

International Classification:

G01N 2904

US Classification:

73614

Abstract:

A residual tire life prediction system uses a clock to trigger a bang generator that provides pulses of electrical energy to a pulse-echo transducer. The transducer converts pulses of electrical energy to pulses of ultrasonic vibration. The transducer is located on the tread of a steel belted tire to transmit pulses of ultrasonic energy into the tire and to receive reflected ultrasonic energy from plies of the tire casing. The transducer converts the reflected ultrasonic energy to provide bursts of electrical signals. The transducer is connected to a time varying gain control circuit that has its output connected via a full-wave rectifier to a first gate and to an input of a voltage level detector. The clock is also connected to a first time-delay circuit that is operative after a delay, subsequent to the pulse of the bang generator, to enable a second gate, connected to the output of the voltage level detector, that provides a signal, when it receives the signal based on the reflection from the outer steel belt, to a second time-delay circuit that provides an enable signal at its output after a predetermined delay for a predetermined period of time to the first gate to open it for passage of signals from the rectifier to a peak sensing device that provides an output signal to a digital panel meter for display of the value of the maximum amplitude passing through the first gate.

US Patent:

54954690, Feb 27, 1996

Filed:

Dec 16, 1994

Appl. No.:

8/356999

Inventors:

Richard A. Halter - Warren MI
Robert J. Randel - Walled Lake MI
John Stark - Ann Arbor MI

Assignee:

Chrysler Corporation - Highland Park MI

International Classification:

H04L 502

US Classification:

370 9

Abstract:

A link apparatus in a node of a mulitinode, collision--resolution, multiplexing communications system connected between a microcontroller (MCU) and a integrated driver and receiver (IDR) of the node for assuming some of the functions of the MCU in delivering and receiving messages to and from a signal-wire communications bus. The link apparatus provides circuits for automatically prepending a start-of-frame to a message being placed on the bus after determining that the conditions on the bus are suitable for transmitting messages. The link apparatus also contains circuits for determining when a node has won arbitration over another node competing for time on the bus.

US Patent:

20210164023, Jun 3, 2021

Filed:

Feb 8, 2021

Appl. No.:

17/170576

Inventors:

- Hercules CA, US
John Stark - Ann Arbor MI, US
Yadwinder Deol - Ann Arbor MI, US
Vishal Sharma - Ann Arbor MI, US

International Classification:

C12Q 1/6811
C12Q 1/6874
C12N 15/10

Abstract:

A system and method for target material capture, the method comprising: receiving a set of target cells into an array of wells defined at a surface plane of a substrate; receiving a set of particles into the array of wells, thereby co-capturing the set of target cells and the set of particles; achieving a desired state for the array of wells upon receiving a washing fluid into a cavity in communication with the array of wells; receiving a lysis buffer into the cavity; receiving a partitioning fluid into the cavity, thereby displacing the lysis buffer from the cavity and partitioning each of the array of wells from adjacent wells, at the surface plane; and retaining intercellular material of the set of target cells, individually with the set of particles within the array of wells.

US Patent:

20200332347, Oct 22, 2020

Filed:

Mar 17, 2020

Appl. No.:

16/821644

Inventors:

- Ann Arbor MI, US
John Stark - Ann Arbor MI, US
Yadwinder Deol - Ann Arbor MI, US
Vishal Sharma - Ann Arbor MI, US

International Classification:

C12Q 1/6811
C12N 15/10
C12Q 1/6874

Abstract:

A system and method for target material capture, the method comprising: receiving a set of target cells into an array of wells defined at a surface plane of a substrate; receiving a set of particles into the array of wells, thereby co-capturing the set of target cells and the set of particles; achieving a desired state for the array of wells upon receiving a washing fluid into a cavity in communication with the array of wells; receiving a lysis buffer into the cavity; receiving a partitioning fluid into the cavity, thereby displacing the lysis buffer from the cavity and partitioning each of the array of wells from adjacent wells, at the surface plane; and retaining intercellular material of the set of target cells, individually with the set of particles within the array of wells.

US Patent:

20150366183, Dec 24, 2015

Filed:

Aug 31, 2015

Appl. No.:

14/840392

Inventors:

- Itasca IL, US
John STARK - Bartlett IL, US
Joel C. HAGEN - Batavia IL, US
Aaron R. FERBER - Chicago IL, US
Rodney H. MONSON - Waukegan IL, US
Evan D. SHAPIRO - Chicago IL, US

International Classification:

A01N 1/02

Abstract:

A method of perfusing an organ or tissue includes perfusing the organ or tissue with a perfusion apparatus; detecting a condition representing at least one of an attitude of the perfusion apparatus or at least one shock experienced by the perfusion apparatus; and altering perfusion based upon the detected condition and/or recording the detected condition.