Ju H Kim

20110108589, May 12, 2011

Nov 6, 2009

12/613880

Ju Han Kim - Glendale CA, US

A45F 3/14
A45F 5/00

224222, 224267

The present invention is a utility armband comprising an elongated flexible band, and a main body panel having a top portion, a bottom portion, and a central portion. Opposite ends of the top portion include a pair of slits which is adapted to pass the elongated flexible band therethrough. The utility armband further comprises a left panel and a right panel extending from a central portion, at least one slot piece mounted on the main body panel, left panel, and right panel, and an adjustable strap retractably attached at the bottom portion of the main body panel. The slot piece includes at least one opening shaped to receive at least one attachment elements coupled to an item such as a tool or accessory, in a snap-fit manner. With at least one tool is inserted onto the slot piece, the main body panel rests on a user's forearm and the left and right panels wrap around the user's arm.

20220416636, Dec 29, 2022

Aug 24, 2022

17/894791

- 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

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

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.

20220345020, Oct 27, 2022

Nov 5, 2020

17/773870

- Los Angeles CA, US
Rachel OZER - Los Angeles CA, US
Alexander JEDINGER - Los Angeles CA, US
Jett FERM - Los Angeles CA, US
Richard PARKS - Los Angeles CA, US
Arbi GHARAKHANI SIRAKI - Los Angeles CA, US
Ju Hyung KIM - Los Angeles CA, US
Tim LAMBERT - Los Angeles CA, US
Sushant CHAVAN - Los Angeles CA, US

H02K 41/03
H02K 1/14

A channel segment for a track of a mover device is provided, the channel segment comprising: opposite ends joined by a body forming a magnetic flux pathway between the opposite ends, the magnetic flux pathway being one or more of C-shaped, U-shaped and horseshoe shaped between the opposite ends, the opposite ends forming respective transverse magnetic flux pathways about perpendicular to the magnetic flux pathway; laminations of ferromagnetic material forming the body, the laminations about parallel to the magnetic flux pathway and about perpendicular to the respective transverse magnetic flux pathways; shear pins through the laminations, the shear pins positioned to reduce eddy currents one or more of in and around the shear pins; and a retention mechanism at the opposite ends, the retention mechanism configured to transversely fasten the laminations together at the opposite ends while remaining insulated from each other.

20230018436, Jan 19, 2023

Sep 28, 2022

17/955027

- 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

HYPERLOOP TECHNOLOGIES, INC. - Los Angeles CA

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

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.

20210408886, Dec 30, 2021

Sep 8, 2021

17/469615

- 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

H02K 41/03
H02K 3/24
G01R 33/385
H02K 1/20
H02K 3/22
H02K 15/02

Disclosed is a machine having a moving member. The moving member including a cold plate having a plurality of slots through the cold plate. The moving member also including a plurality of ferromagnetic cores coupled to the cold plate, each of the plurality of ferromagnetic cores protruding through a respective one of the plurality of slots, creating gaps between the plurality of ferromagnetic cores. The moving member also including a plurality of armature windings coupled to the cold plate, the plurality of armature windings occupying the gaps between the plurality of ferromagnetic cores.

20210336511, Oct 28, 2021

Sep 18, 2019

17/274886

- 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

H02K 9/22
H02K 19/10
H02K 3/04

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.

20200088819, Mar 19, 2020

Sep 19, 2019

16/576610

- 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

G01R 33/385
H02K 1/20
H02K 15/02
H02K 3/22

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.

20200091807, Mar 19, 2020

Sep 19, 2019

16/576577

- 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

H02K 41/03
H02K 3/24

Disclosed is a yoke-less mover of a homopolar linear synchronous machine. The yoke-less mover may include a cold plate having slots. Ferromagnetic cores are fixed to the cold plate. Each of the ferromagnetic cores may protrude through a respective one of the slots, creating gaps between the ferromagnetic cores. Armature windings are fixed to the cold plate. The armature windings may occupy the gaps between the ferromagnetic cores. The ferromagnetic cores of the yoke-less mover have better ferromagnetic utilization and lower weight. It also enables more flexible topologies in the armature windings.