David K Klaffenbach from 2 Jill Marie, Imperial, MO 63052, age 57, Phone: 6366745600

Resumes

Principal Engineer At Bausch & Lomb

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Position:

Principal Engineer at Bausch & Lomb

Location:

Greater St. Louis Area

Industry:

Biotechnology

Work:

Bausch & Lomb since Jun 2008
Principal Engineer
Hewlett-Packard - Digital Printing Technologies (DPT) 2000 - 2008
Expert Electrical Engineer
bioMerieux Sep 1998 - Sep 2000
Design Engineer
Lexmark 1989 - 1998
Staff Engineer

Education:

University of Missouri-Rolla 1985 - 1989
BS, Electrical Engineering

Skills:

Embedded Systems
Sensors
Motion Control
Root Cause Analysis
Optics
Troubleshooting
Verilog
Technical Leadership
Laser
Fiber Optics
Power Electronics
Transducers
Medical Devices
Electronics
Firmware
R&D
Design for Manufacturing
ASIC
Design of Experiments
PCB design
Testing

Us Patents

Sheet Separation Using Two Torque Motors
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US Patent:

7455286, Nov 25, 2008
Filed:

Jun 28, 2005
Appl. No.:

11/169062
Inventors:

David K. Klaffenbach - Battle Ground WA, US
Gary L. Miller - Vancouver WA, US
Jeffrey S. Mathena - Vancouver WA, US
Christopher M. Lesniak - Vancouver WA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

B65H 3/06
US Classification:

271114, 271122, 271125
Abstract:

Various embodiments of a sheet separation system are disclosed.

Encoder
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US Patent:

7463168, Dec 9, 2008
Filed:

Jul 21, 2006
Appl. No.:

11/490577
Inventors:

David A. Rehmann - Vancouver WA, US
David K. Klaffenbach - Battle Ground WA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

H03M 1/22
US Classification:

341 11, 341 3
Abstract:

Various methods and apparatus relating to an encoder are disclosed.

System And Method For Determining The Power Drawn From A Switching Power Supply By Counting The Number Of Times A Switching Power Supply Switch Is Enabled
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US Patent:

7506180, Mar 17, 2009
Filed:

Mar 10, 2005
Appl. No.:

11/077627
Inventors:

David K. Klaffenbach - Battle Ground WA, US
Michael J. Campin - Battle Ground WA, US
Algird M. Gudaitis - Vancouver WA, US
Chadwick W. Stryker - Ridgefield WA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

G06F 1/00
G01R 19/00
US Classification:

713300, 702 57, 702 64, 324120, 324415, 324416
Abstract:

Embodiments of a switching power supply circuit are disclosed wherein the number of times that a switch of the circuit is enabled is counted.

Power Supply Circuit
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US Patent:

7756681, Jul 13, 2010
Filed:

Mar 10, 2005
Appl. No.:

11/077873
Inventors:

David K. Klaffenbach - Battle Ground WA, US
Michael J. Campin - Battle Ground WA, US
Algird M. Gudaitis - Vancouver WA, US
Chadwick W. Stryker - Ridgefield WA, US
Jon S. Boehm - Vancouver WA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

G06F 17/40
US Classification:

702187, 323283, 713320
Abstract:

Embodiments of power supply circuits are disclosed in which a filter function is performed on a count value from a counter that counts the number of times of enabling of a power supply circuit.

Determining Encoder Strip Expansion
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US Patent:

8388104, Mar 5, 2013
Filed:

Jul 25, 2007
Appl. No.:

11/782733
Inventors:

Rick M. Tanaka - Vancouver WA, US
Algird M. Gudaitis - Vancouver WA, US
David K. Klaffenbach - Battle Ground WA, US
Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX
International Classification:

B41J 23/00
US Classification:

347 37, 341 1
Abstract:

A system is provided that includes an encoder strip having encoder markings, first and second optical encoders positioned at a fixed distance from one another on a substrate and, responsive to being moved along the encoder strip, configured to generate first and second signals, respectively, that each indicate detection of the encoder markings on the encoder strip and processing circuitry configured to determine a current phase difference between the first and the second signals using a first portion of the first signal that corresponds to a first plurality of encoder markings and a second portion of the second signal that corresponds to a second plurality of encoder markings.

Reducing Power To A Shape Memory Alloy Background
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US Patent:

20060162332, Jul 27, 2006
Filed:

Jan 21, 2005
Appl. No.:

11/040905
Inventors:

David Klaffenbach - Battle Ground WA, US
Anthony Carcia - Partland OR, US
International Classification:

F01B 29/10
F02G 1/04
US Classification:

060527000
Abstract:

An embodiment of a method includes determining when a shape memory alloy completes changing shape based on measurements of a resistance of the shape memory alloy and reducing power supplied to the shape memory alloy after determining when the shape memory alloy completes changing shape.

Apparatus And Methods For Illuminating Substances Using Color To Achieve Visual Contrast
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US Patent:

20120293992, Nov 22, 2012
Filed:

May 16, 2011
Appl. No.:

13/108483
Inventors:

David K. Klaffenbach - Imperial MO, US
International Classification:

F21V 9/00
US Classification:

362231
Abstract:

An illumination system for illuminating a first biologic substance and a second biologic substance, comprising a first light output device capable of outputting polychromatic first light, a second light output device capable of outputting polychromatic second light, the first light output device and the second light output device selected such that (i) a first apparent color results when the first light is scattered from the first biologic substance and a second apparent color results when the second light is scattered from the first biologic substance, the first apparent color and the second apparent color being substantially the same as one another and (ii) a third apparent color results when the first light is scattered from the second biologic substance and a fourth apparent color results when the second light is scattered from the second biologic substance, the third apparent color and the fourth apparent color being substantially different than one another, and means for temporally modulating amounts of the first light and amounts of the second light in a light output from the system.

Motor Drive System Controlled By A Phase Accumulator And Method Therefor
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US Patent:

60060085, Dec 21, 1999
Filed:

May 29, 1997
Appl. No.:

8/865431
Inventors:

David Kurt Klaffenbach - Versailles KY
Harald Portig - Versailles KY
Thomas Campbell Wade - Lexington KY
Assignee:

Lexmark International, Inc. - Lexington KY
International Classification:

H02P 5165
US Classification:

388813
Abstract:

A high resolution speed control for a DC or BLDC phase-locked-loop (PLL) motor is provided. A phase accumulator sends a time varying frequency reference to the PLL input, where the average frequency sets the motor speed with a high degree of accuracy. A post divider is used to reduce the number of circuits required to implement the function.