Nhk Spring Co., Ltd.

Kousuke Matsubara

Takeo Fukumura

Kenji Murakami

An impact absorbing device includes an attachment component having one-or-more holes, an impact absorption pipe which absorbs external impacts and arranged so that it can slide axially and coaxially within the attachment component, one-or-more movable resistance bodies arranged so that they can move freely within the one-or-more holes, an impact absorption pipe movement component support component, an impact absorption pipe movement component, a support part having a first section and a second section formed in this order so that a distance between each of the sections and an interior side wall of the attachment component becomes smaller respectively, a support part movement component which provides an energization power to the support part, wherein the first section is in a position which faces the one-or-more holes of the attachment component when the support part comes into contact with a bottom part of the attachment component.

Impact absorbing device

A tire inflation pressure monitoring apparatus comprises a reference magnet fixed to a wheel, a movable magnet whose position shifts depending on the inflation pressure of a tire, and a magnetic sensor for detecting the magnetism of the magnets. The reference magnet can be moved in the axial direction of the wheel by means of a position adjusting mechanism. Thus, a relative distance from the reference magnet to the movable magnet can be adjusted to a fixed value (e.g., zero) at the time of calibration. An electric circuit section is stored with a computation formula or a map indicative of the relationships between outputs of the magnetic sensor and minimum distances from the magnets to the magnetic sensor. In detecting the inflation pressure of the tire, data associated with the minimum distances from the magnetic sensor to the magnets are obtained according to the computation formula or map on the basis of the outputs obtained by means of the magnetic sensor. Based on these data, the inflation pressure of the tire is obtained according to a pressure computation formula or a map indicative of the relationship between the tire inflation pressure and the distance between the magnets.

Tire inflation pressure monitoring apparatus

A cylinder piston apparatus according to the present invention comprises a cylinder housing having an oil chamber therein, and a rod fitted in the cylinder housing. A piston-shaped partition member is arranged in the cylinder assembly. The oil chamber is divided into first and second oil chambers by the partition member. The partition member is provided with a valve housing, which has an outside circulation hole capable of communicating with the second oil chamber. A rotary valve is fitted in the valve housing. The valve has an inside circulation hole, which is situated at a position corresponding to the outside circulation hole, and can communicate with the first oil chamber. A stepping motor for driving the rotary valve is housed in a motor-holding chamber which is defined inside the cylinder assembly. The motor-holding chamber is filled with oil, so that the motor is immersed in the oil.

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Yokohama, Japan

Kousuke Matsubara