摘要:
A resin lip type seal (1) capable of increasing safety against rupture by reducing rigidity of a plate-like lip (4) bent around a tip point A of a approximately wedge-shaped recessed part (8) to reduce stress concentration at the point A, suppressing the lowering of sealability due to a reduction in creep of the lip, and increasing the follow-up capability of the lip to the eccentricity of its axis. Indentations are formed on the slidable contact surface (41) of the plate-like lip (4) or/and the anti-slidable contact surface (42) thereof. Indentations (7) are also formed on the sloped slidable contact surface (21) of the inner lip (2) of the seal. Then, the ratio of the portion of each of the slidable contact surfaces where the indentations (7) are formed is ½ or more of each of the surface areas of the slidable contact surfaces (21, 41, 42).
摘要:
There is provided a seal ring that makes it possible to improve attachability and sealability.The seal ring 1 is separated from each other in one area and has a shape with ends, is inserted in an annular groove in a shaft by temporarily moving both the fittable ends 3 and 4 away from each other, and thereby seals an annular gap formed between the shaft and a housing that has a shaft hole into which the shaft is inserted. The seal ring is configured such that: one of both the ends 3 and 4 has a projection 31 projecting in the direction of the circumference of the seal ring; the other end 4 has a recess 42 used in combination with the projection 31. The projection 41 and the recess 42 are fitted together while slid against each other, thereby bringing both the ends 3 and 4 into contact with each other. The seal ring is characterized in that: the recess 42 has an inclining side face 42a, which inclines from the direction of the circumference; and the projection 31 and the recess 42 form a sliding part so that a part of the edge of the leading end of the projection 31 slides over the inclining side face 42a of the recess 42, and portion of the sliding part is formed as a linear sliding portion 13.
摘要:
An electronic component package includes a circuit board which has a mounting surface that does not show wettability for fluxless solder and on which a semiconductor element is mounted, a soldering pattern that shows wettability for the fluxless solder and is formed to surround an area on which the semiconductor element is mounted, a lid that has a shape such that a cavity is formed between the lid and the circuit board, a bonding surface to the soldering pattern is formed in a ring shape, and does not show wettability for the fluxless solder, a solder bonded part that is formed by heating a solder precoat formed of the fluxless solder on a bonding surface of the lid, and a ventilation hole that is formed by providing a bonding surface of the lid exposed in a discontinuous part of the solder precoat after the solder bonded part is formed.
摘要:
An electronic component package includes a circuit board which has a mounting surface that does not show wettability for fluxless solder and on which a semiconductor element is mounted, a soldering pattern that shows wettability for the fluxless solder and is formed to surround an area on which the semiconductor element is mounted, a lid that has a shape such that a cavity is formed between the lid and the circuit board, a bonding surface to the soldering pattern is formed in a ring shape, and does not show wettability for the fluxless solder, a solder bonded part that is formed by heating a solder precoat formed of the fluxless solder on a bonding surface of the lid, and a ventilation hole that is formed by providing a bonding surface of the lid exposed in a discontinuous part of the solder precoat after the solder bonded part is formed.
摘要:
According to one embodiment, a decoder device includes a decoder configured to decode a to-be-decoded sequence by performing an iterative decoding process and to perform a parity check of a decoding result using a check matrix, a detector configured to detect that the to-be-decoded sequence is a non-code word based on a parity check result for each row of the check matrix by the decoder, and a controller configured to control the decoder according to a detection result of the detector.
摘要:
According to one embodiment, a decoder device includes a decoder configured to decode a to-be-decoded sequence by performing an iterative decoding process and to perform a parity check of a decoding result using a check matrix, a detector configured to detect that the to-be-decoded sequence is a non-code word based on a parity check result for each row of the check matrix by the decoder, and a controller configured to control the decoder according to a detection result of the detector.
摘要:
According to one embodiment, a disk controller includes a reader, a selector, and a combining module. The reader performs, when retrying reading data from a magnetic disk, a plurality of read operations with respect to the same area on the magnetic disk while offsetting a head that reads data from the magnetic disk. The selector selects likely read data from a plurality of pieces of read data obtained as results of the read operations performed by the reader based on a predetermined index with respect to each of data lengths shorter than the data length of the area. The combining module combines pieces of read data selected for the data lengths, respectively.
摘要:
There is provided a plunger seal (1) for a fuel injection pump for a direct-injection gasoline engine, in which, even if a resin material is used for a fuel seal member (12), the plunger seal can be made compact, sealing ability is increased, and assembling man-hours can be reduced, and in which set sealing performance can be achieved when a U-shaped elastic member (33) for applying an energizing force in a diametrical direction is used in a groove (41) formed in the fuel seal member (12). The resin fuel seal member (12) and an oil seal member (13) are assembled to form one seal system. Further, when the U-shaped elastic member (33) is installed in the groove (41), an axial position (L1) of an end surface (44a) at the side opposite to the sealed object of a fixing collar (44) formed on an inner peripheral surface of the groove (41) is positioned at the side (B) opposite to the sealed object than the axial position (L2) of a leading end portion (15b) of a seal lip (15) of the fuel seal member (12).
摘要:
A high performance sealing device having an excellent pressure resistance and realizing a prevention of damage. The sealing device usable at a working pressure of 0 to 2 MPa, and not damaged even if the pressure of high-pressure fuel of 5 MPa or higher is applied thereto, wherein high pressure fuel on the high pressure side H is sealed by a first seal part 2, oil from a cam side on a low pressure side L is sealed by a second seal part 3, and the fuel slightly leaked due to failure of scraping at the first seal part is sealed by the second seal part to form a dual seal structure, and a resin ring 21 coming into slidable sealing contact with a shaft 10 is used in the first seal part 2, whereby abnormal abrasion does not occur even when fuel having less lubricity is used, and the durability of the seal is increased.
摘要:
The present invention provides a water-dilutive and conductive coating composition capable of preparing any desired color tone which, upon applying to a thing to be coated, affords various beautiful color tones, gives electroconductivity and prevents static electricity and particularly offers a composition capable of preparing any desired color which can be effectively used in a place where the use of organic solvents and chemical contamination are strictly restricted such as factories for the manufacture of semiconductors. The invention provides a water-dilutive and conductive coating composition whereby any desired color can be afforded, characterized in that, said composition contains 10-50% by weight of water-soluble or water-dispersible synthetic resin (non-volatile content) and 5-40% by weight of white electroconductive pigment and the amount of each of sodium and potassium, in the resulting coated film is not more than 30 ppm.