Nok Corporation

Tokunori Yanagi

Yuki Nakagawa

Hiroshi Suzuki

Isao Tanji

Takeshi Watanabe

Tatsuro Hosen

Hikaru Tadano

Naoki Hagiwara

Takanori Anzai

Mitsuyasu Nakajima

Masasuke Uchiyama

Takuya Amano

Koichi Yoshimura

Provided are a sealing device that can be easily manufactured and achieve a reduction in friction and a method for manufacturing the sealing device. A sealing device is provided between a housing in which a plurality of opening portions are formed in a tubular inner peripheral surface and a rotor that is disposed in the housing and switches a flow path by rotating relative to the housing. The sealing device includes a sealing device main body that is disposed along the inner peripheral surface and includes a sliding member provided on an inner surface or an outer surface. The sealing device main body has a plurality of through-holes that communicate with each of the plurality of openings, and the sealing device main body is a strip plate-shaped member with a flat plate shape that is bent and deformed.

Sealing device and method for manufacturing sealing device

A gasket, to be installed between a first housing and a second housing, includes a first loop-shaped portion in a loop shape, a second loop-shaped portion in a loop shape that is positioned at a radially inner side of the first loop-shaped portion, with a first gap between the first loop-shaped portion and the second loop-shaped portion, and a first connector portion connecting the first loop-shaped portion and the second loop-shaped portion in a part of the first gap.

Gasket

A sealing arrangement is provided for sealing a mounting groove formed in a first or second mounting member separated by a gap and defining a hydraulic passage. A gasket is mounted in the groove between the passage and gap. The gasket includes an annular gasket body having first and second axial ends and a buried reinforcement ring. The gasket body includes a unitary flange extending radially outward from the first axial end. The flange includes a first seal lip extending axially outward from the flange proximate the passage or gap. The first seal lip contacts a surface of the first or second mounting member facing the passage. The gasket body includes a second seal lip extending outward from the second axial end to contact a bottom surface of the mounting groove.

Positive/negative pressure gasket

A gasket is configured to be mounted in a gasket mounting groove that opens to the radially inside of a mounting member provided with a hydraulic passage, and is provided with a back-side hydraulic passage serving as a gap on its groove bottom surface. The gasket includes a gasket body with a reinforcement ring buried therein and a flange provided to extend from one axial end of the gasket body toward the radially outside. The gasket also includes a one-end-side seal lip that is provided to extend from the one axial end of the gasket body toward one side in an axial direction and the radially inside, and is configured to come in contact with one axial side surface of the gasket mounting groove when the gasket body is mounted. The gasket also includes an other-end-side seal lip that is provided to extend from the other axial end of the gasket body toward the other side in the axial direction and the radially outside, and is configured to come in contact with the other axial side surface and a bottom surface of the gasket mounting groove when the gasket body is mounted.

A cylinder head gasket to be mounted between a cylinder block and a cylinder head of an engine includes: at least one bore-hole plate having a bore hole which corresponds to a cylinder bore of the cylinder block; and a main plate disposed so as to surround the bore-hole plate, wherein the bore-hole plate and the main plate are separated from each other without being in contact with each other, while being connected with each other with a heat insulating member interposed between the bore-hole plate and the main plate.

Cylinder head gasket

The invention provides a gasket having sealing lips in axial both ends of a gasket body in which a reinforcing ring is embedded. The gasket, has a structure in which the gasket body is displaced to the one axial side within the mounting groove when pressure acts on the gasket because the rigidity of a second sealing lip is set to be higher than the rigidity of a first sealing lip or a reinforcing ring is disposed closer to the one axial side within the gasket body. Furthermore, a seal bead which is brought into close contact to the bottom surface of the mounting groove when mounted is provided in the gasket body and a space portion surrounded by the second sealing lip, the seal bead, and the bottom surface and the other side surface of the mounting groove when mounted is provided.

An object of the present invention is to provide a gasket capable of ensuring an excellent sealing property by a pair of seal beads oriented in directions axially opposing to each other, regardless of an inserting direction of the gasket into a setting groove. The object is achieved by a gasket in which: an axial length of a reinforcement ring () is formed to have a length such that the other axial end of the reinforcement ring () approaches an end surface of the other mating member or an end surface of a setting groove () in a state that one axial end of the reinforcement ring () contacts the end surface of the setting groove or the end surface of the other mating member; one axial end of the reinforcement ring () projects from an outer peripheral portion of a first seal bead (), and the first seal bead () has rigidity lower than rigidity of a second seal bead (); and the second seal bead () is formed with interference relative to the end surface of the other mating member or the end surface of the setting groove in a state that one axial end of the reinforcement ring () contacts the end surface of the setting groove or the end surface of the other mating member.

In a dust cover for a ball joint, one end of a ball stud is retained within a socket, the other end is fixed by fastening a knuckle having a notch portion, one end large-diameter and other end small-diameter opening portions are respectively retained to the socket and the shaft, and a plate member is retained between an inner peripheral surface of the knuckle and an outer peripheral surface of the shaft. The plate member is constructed by an annular plate member, an elastic annular seal portion integrally formed in an inner peripheral side of the annular plate member, and an elastic engagement projection in the annular plate member in the knuckle side, and engaging with the notch portion. The annular seal portion is retained in a compression manner between an annular step portion in an inner peripheral surface of the knuckle and an outer peripheral surface of the shaft.

Growing community of inventors

Makinohara, Japan

Tokunori Yanagi