Jonathan S Allen

US Patent:

6345834, Feb 12, 2002

Filed:

Oct 27, 1997

Appl. No.:

08/957839

Inventors:

Emanuele Bianchini - Charlestown MA
Kenneth B. Lazarus - Boston MA
Jeffrey W. Moore - Arlington MA
Robert N. Jacques - Hopkington MA
Jonathan C. Allen - Brookline MA

Assignee:

Active Control eXperts, Inc. - Cambridge MA

International Classification:

A63C 5075

US Classification:

280602, 280 141, 310317, 310326

Abstract:

A recreational board such as a snowboard incorporates strain transducers to damp a plate resonance of the board. The strain transducers are preferably located around a peripheral region to capture strain energy affecting control edges, for example steering control edges at the front and/or rear of the board. Electrical energy from the transducers is shunted to damp a targeted resonance. In a preferred embodiment the strain transducers cover a region of the snowboard adjacent one surface and extending along the forward periphery, preferably at both inside and outside edges, and are shunted with a resonant shunt tuned to a torsional or torsion-like mode of the board that is excited during steering maneuvers. The transducers may be fabricated as preassembled sheets or may be formed in the snowboard during the assembly process using sheets of piezoceramic material, or using piezo fiber or other composite constructions. The strain material may be positioned to preferentially shift or damp one resonance mode, and/or it may be arranged to exert a directional effect or anisotropic control authority.

US Patent:

6485380, Nov 26, 2002

Filed:

Jan 12, 2001

Appl. No.:

09/759855

Inventors:

Ronald Spangler - Somerville MA
David Gilbert - Arlington MA
Carl Prestia - Stow MA
Emanuele Bianchini - Winchester MA
Kenneth B. Lazarus - Concord MA
Jeffrey W. Moore - Arlington MA
Robert N. Jacques - Andover MA
Jonathan C. Allen - Brookline MA
Farla M. Russo - Brookline MA

Assignee:

Active Control eXperts, Inc. - Cambridge MA

International Classification:

A63B 4902

US Classification:

473521, 473546, 310317, 310326

Abstract:

A golf club includes an electroactive assembly attached to the club and electrically tuned to capture energy from one or more vibrational modes with high efficiency. More generally, a sports implement includes an electroactive element, such as a piezoceramic sheet attached to the implement, and a circuit attached to the electroactive element. The circuit may be a shunt, or may include processing such as amplification and phase control to apply a driving signal which may compensate for strain sensed in the implement, or may simply alter the stiffness to affect performance. The electroactive element is located in a region of high strain to apply damping, and may include plural subassemblies mounted to capture energy in different planes, or to capture an asymmetric strain distribution while maintaining structural symmetry. In a ski the element captures between about one and five percent of the strain energy of the ski. The region of high strain may be found by modeling mechanics of the sports implement, or may be located by empirically mapping the strain distribution which occurs during use of the implement.

US Patent:

60864907, Jul 11, 2000

Filed:

Apr 3, 1998

Appl. No.:

9/054940

Inventors:

Ronald Spangler - Somerville MA
David Gilbert - Arlington MA
Carl Prestia - Stow MA
Emanuele Bianchini - Charlestown MA
Kenneth B. Lazarus - Concord MA
Jeffrey W. Moore - Arlington MA
Robert N. Jacques - Hopkington MA
Jonathan C. Allen - Brookline MA
Farla M. Russo - Brookline MA

Assignee:

Active Control eXperts, Inc. - Cambridge MA

International Classification:

A63B 5900

US Classification:

473564

Abstract:

A baseball bat includes an electroactive assembly attached near the handle and electrically tuned to capture energy from several modes with high efficiency. More generally, a sports implement includes an electroactive element, such as a piezoceramic sheet attached to the implement, and a circuit attached to the electroactive element. The circuit may be a shunt, or may include processing such as amplification and phase control to apply a driving signal which may compensate for strain sensed in the implement, or may simply alter the stiffness to affect performance. In a ski, the electroactive element is located near to the root in a region of high strain to apply damping, and the element captures between about one and five percent of the strain energy of the ski. The region of high strain may be found by modeling mechanics of the sports implement, or may be located by empirically mapping the strain distribution which occurs during use of the implement. In other embodiments, the electroactive elements may remove resonances, adapt performance to different situations, or enhance handling or comfort of the implement.

US Patent:

61969354, Mar 6, 2001

Filed:

Apr 9, 1998

Appl. No.:

9/057972

Inventors:

Ronald Spangler - Somerville MA
David Gilbert - Arlington MA
Carl Prestia - Stow MA
Emanuele Bianchini - Charlestown MA
Kenneth B. Lazarus - Concord MA
Jeffrey W. Moore - Arlington MA
Robert N. Jacques - Hopkington MA
Jonathan C. Allen - Brookline MA
Farla M. Russo - Brookline MA

Assignee:

Active Control Experts, Inc. - Cambridge MA

International Classification:

A63B 5300
A63B 5310
H01L 4104

US Classification:

473318

Abstract:

A golf club includes an electroactive assembly attached to the club and electrically tuned to capture energy from one or more vibrational modes with high efficiency. More generally, a sports implement includes an electroactive element, such as a piezoceramic sheet attached to the implement, and a circuit attached to the electroactive element. The circuit may be a shunt, or may include processing such as amplification and phase control to apply a driving signal which may compensate for strain sensed in the implement, or may simply alter the stiffness to affect performance. The electroactive element is located in a region of high strain to apply damping, and may include plural subassemblies mounted to capture energy in different planes, or to capture an asymmetric strain distribution while maintaining structural symmetry. In a ski the element captures between about one and five percent of the strain energy of the ski. The region of high strain may be found by modeling mechanics of the sports implement, or may be located by empirically mapping the strain distribution which occurs during use of the implement.

US Patent:

58576940, Jan 12, 1999

Filed:

Sep 29, 1995

Appl. No.:

8/536067

Inventors:

Kenneth B. Lazarus - Boston MA
Jeffrey W. Moore - Arlington MA
Robert N. Jacques - Hopkington MA
Jonathan C. Allen - Brookline MA

Assignee:

Active Control Experts, Inc. - Cambridge MA

International Classification:

A63C 5075

US Classification:

280602

Abstract:

A sports implement including an electroactive element, such as a piezoceramic sheet attached to the implement and a circuit attached to the electroactive element. The circuit may be a shunt, or may include processing such as amplification and phase control to apply a driving signal which may compensate for strain sensed in the implement, or may simply alter the stiffness to affect performance. In a ski, the electroactive element is located near to the root in a region of high strain to apply damping, and the element captures between about one and five percent of the strain energy of the ski. The region of high strain may be found by modeling mechanics of the sports implement, or may be located by empirically mapping the strain distribution which occurs during use of the implement. In other embodiments, the electroactive elements may remove resonances, adapt performance to different situations, or enhance handling or comfort of the implement. Other embodiments include striking implements intended to hit a ball or object in play, such as golf clubs and tennis racquets, wherein the strain elements may alter the performance, feel or comfort of the implement.

US Patent:

20180168738, Jun 21, 2018

Filed:

Dec 12, 2017

Appl. No.:

15/838952

Inventors:

- Maple Grove MN, US
Jonathan Allen - Medford MA, US

International Classification:

A61B 34/20
A61B 5/06
A61M 25/01

Abstract:

A method uses an electromagnetic tracking system, including a number of field transmitters and at least one receiver, to determine location information associated with a medical device. The method includes transmitting a set of electromagnetic signals, each signal having a frequency that is different than a frequency associated with each of the other signals, where each signal corresponds to a sum of sinusoidal functions, each of which includes an amplitude and a frequency. A field signal is received, and includes an undistorted field component and a distortion component. The amplitudes and frequencies of the sinusoidal functions are selected such that the distortion component includes a residual error arising from terms of at least a specified order in frequency. Field components corresponding to the field transmitters are extracted from the received signal, and the location information is determined based on the field components.

US Patent:

20170092014, Mar 30, 2017

Filed:

Sep 25, 2016

Appl. No.:

15/275464

Inventors:

- Maple Grove MN, US
Daniel Klebanov - Arlington MA, US
Ruslan R. Hristov - Lexington MA, US
Leon Fay - Lexington MA, US
Jonathan Allen - Medford MA, US

International Classification:

G06T 19/20
A61B 5/00
A61B 5/044
G06T 17/20
G06T 15/04

Abstract:

A system and method for voltage-guided anatomical shell editing includes outputting, to a display device, an anatomical shell of a cardiac structure. The anatomical shell is based on signals sensed by a mapping probe, each signal including a respective sensed voltage. User input specifying a first target depth for editing is received, as is a selection of a first region of the anatomical shell. A modified anatomical shell is generated by removing a first portion of the anatomical shell including the selected first region to a first editing depth based on the first target depth and generating a new surface region on the modified anatomical shell. Based on the voltage associated with the new surface region, the edit can be maintained, undone, and/or modified.

Address:

4050 NW 7 Ln, Delray Beach, FL 33445

VIN:

1J8HS58P57C519364

Make:

JEEP

Model:

CHER

Year:

2007