Mark K Ekblad

US Patent:

6741955, May 25, 2004

Filed:

Mar 5, 2002

Appl. No.:

10/087729

Inventors:

James M. Rutherford - Cypress TX
Mark K. Ekblad - San Jose CA

Assignee:

Uson, L.P. - Houston TX

International Classification:

G06F 1710

US Classification:

703 2, 703 6, 702 47, 702 98, 73 405 R

Abstract:

A system for determining a leak rate of a device during an adiabatic cooling phase is provided. The system includes a leak rate training system receiving leak rate calibration data, such as pressure data or mass flow data for a device having a known leakage rate. The leak rate training system generates an adiabatic cooling model from the leak rate calibration data, such as by solving a finite difference equation for one or more unknown process variables that are dependent on the adiabatic cooling parameters of the device. The system further includes a leak rate detection system receiving the adiabatic cooling model and leak rate data and determining a leak rate component of the leak rate data using the adiabatic cooling model, such as by using the variable values determined through solving the finite difference model to interpolate between the leak rate calibration data that was gathered using known leakage rates.

US Patent:

7415312, Aug 19, 2008

Filed:

May 26, 2004

Appl. No.:

10/855696

Inventors:

Mark K. Ekblad - San Jose CA, US
Jeffrey M. Parker - Cedar Park TX, US

International Classification:

G05B 13/02
G06F 19/00
F27B 5/14
H05B 3/68
F27D 11/00
A21B 1/22
A21B 1/00

US Classification:

700 29, 700 28, 700121, 700207, 219390, 2194441, 2194431, 219402, 219405, 324754, 324713, 324465, 324511

Abstract:

A process module tuning method characterizes a process module by gathering data using a process condition measuring device to measure process outputs while inputs are excited. The data is used to identify a dynamic process model. The dynamic process model is then be used to determine process input settings that will produce desired outputs. For multi-zone process modules, the interactions between zones may be modeled.

US Patent:

59204788, Jul 6, 1999

Filed:

Jun 27, 1997

Appl. No.:

8/884254

Inventors:

Mark K. Ekblad - San Jose CA
Curtis F. Elia - San Carlos CA

Assignee:

Oakleaf Engineering, Inc. - Redwood City CA

International Classification:

G05B 1302
G05B 1304
G06F 1710
H02P 100

US Classification:

364149

Abstract:

A multi-input multi-output (MIMO) controller is configured as a generic, non-interacting, multivariable controller with adaptive capabilities. The controller transforms the coupled multivariable control problem to multiple decoupled single-input single-output loops. The decoupling occurs in the input/output map of the system being controlled. The transformed system can then be controlled using any control synthesis technique to meet the system performance objectives, such as Proportional plus Integral plus Derivative (PID) control. An empirical dynamic model is continually identified from on-line data. From this model, static decoupling transformations based on a singular value decomposition are determined and updated and the controller gains are calculated.

US Patent:

20150327375, Nov 12, 2015

Filed:

May 6, 2014

Appl. No.:

14/271184

Inventors:

- Morristown NJ, US
Brad Terlson - Maple Grove MN, US
Mark E. Stout - Maple Grove MN, US
Mark Ekblad - North Oaks MN, US
Eugene J. Takach - Eden Prairie MN, US
Steven L. Wolff - Hamel WI, US
David J. Emmons - Plymouth MN, US
Travis Read - Little Canada MN, US

International Classification:

H05K 5/00
H05K 5/06
H02G 3/10

Abstract:

A wall plate assembly for an HVAC controller may include a rear plate including an aperture extending through the rear plate and a front plate securable to the rear plate. In some cases, the front plate may have a recessed portion that is recessed back toward the rear plate and align with the aperture in the rear plate. An air flow barrier may be secured to the recessed portion of the front plate. The air flow barrier may include a barrier surface that covers a portion of the aperture formed in the recessed portion of the front plate to reduce air infiltration. The air flow barrier may include an air flow barrier aperture that is sized to accommodate wires passing through the aperture in the recessed portion of the front plate for connection to a wire connection block of the front plate.