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Tire noise reduction device

ActiveUS20090277549A1Retain durabilityRapid and reliable sealingInflatable tyresWheelsEngineeringNoise reduction
A tire noise reduction device includes at least one noise absorbing member made of a porous material. The noise absorbing member is attached to the inner surface of the tire tread portion. The noise absorbing member includes multiple continuous grooves arranged side by side in a tire circumferential direction in the outer peripheral surface of the noise absorbing member. Each of the continuous grooves has an areal groove bottom and forms see-through regions in the width direction of the noise absorbing member. A groove edge-to-edge distance between each adjacent two of the continuous grooves in the tire circumferential direction is 2 mm to 40 mm. A largest see-through cross-sectional area of each continuous groove is 20 mm2 to 100 mm2.
Owner:YOKOHAMA RUBBER CO LTD

Dust collecting hopper

The invention discloses a dust collecting hopper which comprises a hopper body and an inserting plug. The hopper body is hung on a support in a lifting mode through an elastic connecting rod. A feeding opening for materials to enter is formed in the upper portion of the hopper body. The lower portion of the hopper body is in a funnel type. A discharge opening is formed in the bottom end of the lower portion of the hopper body. The inserting plug is fixedly arranged on the support and is placed in the hopper body. The inserting plug comprises a valve part, an upper guiding part and a lower guiding part. The upper guiding part and the lower guiding part are respectively connected with the upper portion and the lower portion of the valve part in a carrying mode. The diameter of the valve part is larger than the diameter of the upper guiding part and the diameter of the lower guiding part. The lower edge of the valve part is attached with the inner wall of the lower portion of the hopper body under the effect of the elastic connecting rod. An annular material storing cavity is formed in the space between the upper guiding part and the hopper body. An annular discharge cavity communicated with the discharge opening is formed in the space between the lower guiding part and the hopper body. According to the dust collecting hopper, material loading efficiency can be greatly improved, and raised dust and waste are reduced.
Owner:SCIKOON IND
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