Michael D Janowski

US Patent:

20030015830, Jan 23, 2003

Filed:

Jul 20, 2001

Appl. No.:

09/910386

Inventors:

Lane Miller - Fuquay-Varina NC, US
Douglas Swanson - Apex NC, US
Russell Alteri - Cary NC, US
Douglas Ivers - Cary NC, US
Stephen Hildebrand - Apex NC, US
William Jensen - Apex NC, US
Scott Miller - Raleigh NC, US
Michael Janowski - Clayton NC, US
Michael Walch - Cary NC, US

Assignee:

Lord Corporation

International Classification:

F16F005/00

US Classification:

267/140110

Abstract:

A controlled equilibrium device comprising a housing; at least one spring, each at least one spring having a spring stiffness; and a load leveling device movable through the housing between a first maximum displacement position and a second maximum displacement position, the load leveling device comprising a deadband displacement zone defined between a first deadband displacement threshold and a second deadband displacement threshold, the displacement required to reach the first and second deadband displacement thresholds being less than the displacement distances required to reach the first and second maximum displacement positions, the at least one spring stiffness being substantially constant when the displacement of the load leveling device is within the deadband zone, the stiffness of the at least one spring being modified to a second stiffness when the load leveling device is equal to or beyond either the first deadband displacement threshold or the second deadband displacement threshold.

US Patent:

20110033310, Feb 10, 2011

Filed:

May 5, 2010

Appl. No.:

12/774184

Inventors:

Askari Badre-Alam - Apex NC, US
Michael D. Janowski - Clayton NC, US
Michael W. Trull - Apex NC, US

International Classification:

F01D 5/26
H02K 33/00

US Classification:

416500, 310 15

Abstract:

An electromagnetic inertial actuator includes a support base and a parallel arrangement of a first flexure part, a voice coil motor part, and a second flexure part. The parallel arrangement is cantilevered from the support base.

US Patent:

20110209958, Sep 1, 2011

Filed:

Nov 4, 2009

Appl. No.:

13/127559

Inventors:

Askari Badre-Alam - Apex NC, US
Michael D. Janowski - Clayton NC, US

International Classification:

F16F 7/104
F16F 7/10
F16F 1/20
B23P 17/04

US Classification:

188379, 267164, 298969

Abstract:

A resonant inertial force generator for controlling vibrations of a structure includes a compliant spring comprising a stack of flexures and elastomeric shims in alternating arrangement, a driven inertial mass coupled to the compliant spring to generate a vibration controlling force.

US Patent:

20160009386, Jan 14, 2016

Filed:

Mar 20, 2014

Appl. No.:

14/773029

Inventors:

- Cary NC, US
Michael D. JANOWSKI - Clayton NC, US
Jihan RYU - Seoul, KR
Reuben SCHUFF - Raleigh NC, US
John Mark FREEZE - Raleigh NC, US

Assignee:

LORD CORPORATION - Cary NC

International Classification:

B64C 27/00
F16F 15/22

Abstract:

Improved force generator (FG) devices and methods are provided herein. A FG device () includes a housing (), a shaft (S) centrally disposed within the housing, and multiple imbalance rotors () disposed within the housing and provided along the shaft. At least two pairs (PA, PB) of imbalance rotors are provided in a nested configuration with respect to each other along the shaft. The at least two pairs (PA, PB) of imbalance rotors are supported in the nested configuration by large and small bearings (BA, BB). Any two imbalance rotors are paired to rotate together in a same direction according to a desired vibration canceling force. A method of controlling vibration within a structure is provided. The method includes detecting vibration, receiving a force command at a FG device, and pairing any two imbalance masses together and rotating a pair of imbalance masses via the rotors together in a same direction to cancel the detected vibration.