Erik C Johnson

US Patent:

7972679, Jul 5, 2011

Filed:

Nov 20, 2009

Appl. No.:

12/592198

Inventors:

Fielder Stanton Lyons - Phoenix AZ, US
Jeffrey A. Mears - Chandler AZ, US
Gene C. Weedon - Richmond VA, US
Kenneth C. Harding - Midlothian VA, US
Lisa Owen - Charlotte NC, US
Peter Anthony Russell - Liberty Township OH, US
Joseph Mitchell - Charlotte NC, US
Erik Johnson - Phoenix AZ, US

Assignee:

BAE Systems Tensylon H.P.M., Inc. - Monroe NC

International Classification:

B29C 65/00
B32B 37/10
B32B 37/22

US Classification:

428156, 139383 R, 156164, 156194, 1563046, 428107, 428213, 428364, 442135

Abstract:

A ballistic-resistant molded article having a sandwich-type structure including two outer portions of a first high modulus material surrounding an inner portion of a second high modulus material. The outer portions are comprised of a plurality of interleaved layers of adhesive coated cross-plied non-fibrous ultra high molecular weight polyethylene tape. The inner portion is comprised of a plurality of interleaved layers of high modulus cross-plied fibers embedded in resin. The stack of interleaved layers is compressed at high temperature and pressure to form a hybrid sandwich ballistic-resistant molded article that includes a mix of high modulus materials. It has been found that ballistic resistance is higher for the hybrid structure than for a monolithic structure of comparable areal density.

US Patent:

7976932, Jul 12, 2011

Filed:

May 29, 2009

Appl. No.:

12/455279

Inventors:

Fielder Stanton Lyons - Phoenix AZ, US
Jeffrey A. Mears - Chandler AZ, US
Gene C. Weedon - Richmond VA, US
Kenneth C. Harding - Midlothian VA, US
Lisa Owen - Charlotte NC, US
Peter Anthony Russell - Liberty Township OH, US
Joseph Mitchell - Charlotte NC, US
Erik Johnson - Phoenix AZ, US

Assignee:

BAE Systems Tensylon H.P.M, Inc. - Monroe NC

International Classification:

B29C 65/00
B32B 37/10
B32B 37/22

US Classification:

428156, 139383 R, 156164, 156194, 1563046, 428107, 428213, 428364, 429144, 442135

Abstract:

A ballistic resistant panel including a strike face portion and a backing portion. The strike face portion includes a plurality of interleaved layers of non-fibrous ultra high molecular weight polyethylene tape. The backing portion includes a plurality of interleaved layers of cross-plied fibers of ultra high molecular weight polyethylene. The entire stack of interleaved layers is compressed at high temperature and pressure to form a ballistic resistant panel having a strike face on one side. It has been found that ballistic resistance increases as the weight ratio of the strike face portion with respect to the backing portion decreases. A composite panel having a strike face Tensylon tape with at most 40% of the total weight of the panel exhibits improved ballistic resistance properties as compared to a monolithic structure of strictly interleaved layers of cross-plied high modulus fibers.

US Patent:

20110278338, Nov 17, 2011

Filed:

May 17, 2011

Appl. No.:

13/109112

Inventors:

Erik Matthew Johnson - Phoenix AZ, US

Assignee:

BAE Systems Specialty Defense Systems of Pennsylvania, Inc. - Jessup PA

International Classification:

A45F 3/04

US Classification:

224637, 224627

Abstract:

A backpack can be used in many different configurations and is adaptable to support numerous attachments and accessories so as to support, for example, a soldier for up to five days or more. The main pack body includes a large main compartment, and upper and lower sewn-on secondary compartments on the backside of the pack. Two detachable side pouches may be provided, and a detachable bottom compartment. A suspension system includes a waist belt and a shoulder strap system.

US Patent:

20220416636, Dec 29, 2022

Filed:

Aug 24, 2022

Appl. No.:

17/894791

Inventors:

- Los Angeles CA, US
Arbi GHARAKHANI SIRAKI - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US
Shahriyar BEIZAEE - Los Angeles CA, US
Rachel OZER - Los Angeles CA, US
Ju Hyung KIM - Los Angeles CA, US

International Classification:

H02K 41/03
H02K 3/24
G01R 33/385
H02K 1/20
H02K 3/22
H02K 15/02
H02K 3/04
H02K 9/22
H02K 19/10

Abstract:

Homopolar linear synchronous machines are provided herein that include a mover device. The mover device includes a cold plate with ferromagnetic cores extending through slots in the cold plate. Layers of armature coils are located around the ferromagnetic cores on opposite sides of the cold plate. The mover device further includes at least one field coil.

US Patent:

20220384077, Dec 1, 2022

Filed:

Nov 5, 2020

Appl. No.:

17/774038

Inventors:

- Los Angeles CA, US
Noel GODINEZ - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US
George TIRONE - Los Angeles CA, US

International Classification:

H01F 7/08
H01F 27/28
H01F 7/06

Abstract:

An electromagnetic actuator for generating force is provided. The electromagnetic actuator includes a ferromagnetic body extending along a longitudinal axis, the ferromagnetic body comprising: a back-iron portion; and a pair of pole portions, extending from the back-iron portion, the back-iron portion connecting the pair of pole portions. The electromagnetic actuator further includes one or more magnetic-flux changing components at the pole portions, a respective magnetic-flux changing component located at a respective pole face, the respective magnetic-flux changing component configured to change magnetic flux density at a respective track-facing surface relative to the respective pole face. The electromagnetic actuator further includes electrical windings around the pole portions.

US Patent:

20220385162, Dec 1, 2022

Filed:

Nov 5, 2020

Appl. No.:

17/773940

Inventors:

- Los Angeles CA, US
Arbi GHARAKHANI SIRAKI - Los Angeles CA, US
Rachel OZER - Los Angeles CA, US
Shahriyar BEIZAEE - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US

International Classification:

H02K 49/04
H02K 11/21
H02K 11/25
H02K 41/025

Abstract:

A system (), electromagnetic actuator () and track () for braking are provided. The actuator () includes pole portions () extending from back-iron portions. Respective longitudinal axes () of the pole portions () are arranged about parallel to one another and about perpendicular to a common movement axis (). A pole pitch of the pole portions () is selected to induce eddy currents in a segmented track (), such that the eddy currents are present in a skin depth at more than one surface of segments () of the segmented track () when the pole portions () are moving at given speeds. Eddy current generated losses occupy about an entirety of a volume of a segment () of the track () below a given intermediate speed, and the eddy current generated losses occupy at least one third of the volume of the segment () at a given maximum speed greater than the given intermediate speed. Individually controllable electrical windings are around respective pole portions ().

US Patent:

20220376595, Nov 24, 2022

Filed:

Nov 5, 2020

Appl. No.:

17/773888

Inventors:

- Los Angeles CA, US
Tim LAMBERT - Los Angeles CA, US
Erik JOHNSON - Los Angeles CA, US

International Classification:

H02K 41/03
H02K 1/20
H05K 7/20
H02K 5/22

Abstract:

An electromagnetic machine for generating force is provided. The electromagnetic machine includes a magnet having opposing sides extending along a longitudinal axis. The electromagnetic machine includes a pair of ferromagnetic bodies respectively extending along the opposing sides of the magnet, and along the longitudinal axis, each of the ferromagnetic bodies comprising: a back-iron portion; and a pole portion extending from the back-iron portion. The magnet and the ferromagnetic bodies include reciprocal retention devices at the opposing sides along the longitudinal axis. The electromagnetic machine includes electrical windings around respective pole portions of the ferromagnetic bodies, the electrical windings around the respective pole portions being independently controllable. The electromagnetic machine includes at least one cold plate configured to thermally isolate the magnet from the electrical windings.

US Patent:

20230018436, Jan 19, 2023

Filed:

Sep 28, 2022

Appl. No.:

17/955027

Inventors:

- Los Angeles CA, US
Arbi Gharakhani SIRAKI - Pasadena CA, US
Erik JOHNSON - Los Angeles CA, US
Shahriyar BEIZAEE - Woodland Hills CA, US
Rachel OZER - Los Angeles CA, US
Ju Hyung KIM - Los Angeles CA, US

Assignee:

HYPERLOOP TECHNOLOGIES, INC. - Los Angeles CA

International Classification:

H02K 41/03
H02K 3/24
G01R 33/385
H02K 1/20
H02K 3/22
H02K 15/02
H02K 3/04
H02K 9/22
H02K 19/10

Abstract:

A moving member of a machine can include a cold plate that serves as a primary structural member for the moving member. The cold plate can have one or more cooling channels formed within the cold plate. A plurality of armature windings can be fixed to the cold plate. One or more field windings can be fixed to the cold plate. A plurality of ferromagnetic cores can be fixed to the cold plate, each ferromagnetic core positioned within a loop of at least one of the plurality of armature windings. Other embodiments are described.