Hands Corporation Ltd.

Hyundai Motor Company

Kia Motors Corporation

In-Bum Hwang

Kyoung-Duck Shin

Keon-Ki Han

Hyun-Soo Kim

Nam-Young Kim

Hyeon-Chang Seung

Young-Sik Kim

Jong-Wook Lee

Eun-Sang Ryu

Joong-Wook Lee

Tae-Soo Chi

Suk-Jin Ko

A wheel resonator for reducing a resonance phenomenon inside a tire of a vehicle may include a plurality of wheel resonators mounted to a tire wheel. First and second wheel resonators of the plurality of wheel resonators are fixed with each other by a fastening part including a protrusion disposed on an end of the first wheel resonator penetrating through a hole disposed in an end of the second wheel resonator. An end portion of the protrusion has a size greater than a size of the hole. As such, quality of a wheel through more reliable noise reduction by making a wheel resonator in a manner of forming a fitting type fastening part in the wheel resonator itself and fixing the wheel resonator by ultrasonic welding can be improved.

Ultrasonic welding type wheel resonator

The present invention relates to a vertical centrifugal casting device comprising: an installation frame including a rotary table; a rotation table bearing-coupled to the rotary table so as to be rotated by the operation of a driving means; a supply connection means; rotation-preventing equipment; a mold part; a side mold fixing means; an upper mold fixing means; a connection fixing part; a lifting means; and an ejector means coupled to the lifting frame of the lifting means so as to eject a molded product.

Vertical centrifugal casting device

Growing community of inventors

Seoul, South Korea

In-Bum Hwang