Abstract: A base plate is a portion of a housing of a disk driving device having a disk rotating with a rotation axis as a center, and is a cast product. The base plate has a bottom plate part and a peripheral wall part. The bottom plate part has a rectangular shape when viewed in an axial direction. The peripheral wall part extends from an outer peripheral edge of the bottom plate part toward a side of the axial direction to surround the periphery of the bottom plate part. A metal member embedded in the peripheral wall part is provided.

Abstract: A base plate includes a bottom wall and a peripheral wall. The peripheral wall extends from the bottom wall to an axially upper side. The bottom wall includes a screw hole recessed from a peripheral edge of a lower end surface of the bottom wall to the axially upper side. The screw hole includes an inclined part and a column body. The inclined part is defined to have an inner diameter that decreases from a lower end toward the axially upper side. The column body extends from an upper end of the inclined part to the axially upper side and is defined with a threaded part. In a cross section including a center line that passes through a center of the column body in an axial direction, the inclined part is inclined at an inclination angle of 25° or more and 35° or less with respect to the center line.

Abstract: A powder feeding device configured to fill a saggar with powder by compressing the powder thereinto may include: a pressing plate configured to compress the powder in the saggar; and a pressing mechanism configured to press the pressing plate toward the powder in the saggar. The pressing plate may include a compression plate including a pressing surface that compresses the powder by contacting the powder; and a plurality of slit plates disposed on the pressing surface and extending downward from the pressing surface. The slit plates may be arranged radially as the powder feeding device with the saggar placed therein is viewed from above. When the saggar is placed in the powder feeding device, distances between the slit plates and a sidewall of the saggar may be substantially equal and the distances between the slit plates and the sidewall of the saggar may be 30 mm or less.

Abstract: This base plate constitutes a part of a housing of a disk drive device, and is formed from a metal plate and a die-cast part. The metal plate includes a board-shaped bottom plate portion that spreads out perpendicular to an up-down extending axis of rotation of a disk. The die-cast part covers at least a part of the bottom plate portion. Metal which constitutes the bottom plate portion is higher in rigidity than metal which constitutes the die-cast part.

Abstract: A base plate becomes a part of a housing of a disk drive device and is made of a metal die-cast member. The base plate includes a bottom wall portion and a cylindrical wall portion. The bottom wall portion extends perpendicular to a rotation axis of a disk extending in a vertical direction. The cylindrical wall portion protrudes upward from an upper surface of the bottom wall portion along the rotation axis and has a shaft through hole through which a shaft is inserted. The cylindrical wall portion has an annular stepped portion that protrudes radially outward from an outer peripheral surface of a root portion. A processed surface is formed on at least a part of an outer peripheral surface of the stepped portion.

Abstract: A base plate includes a base body including a bottom plate and a pivot post, and an electrodeposition coating film. The bottom plate extends perpendicular to a first axis, a rotation axis of the disk, and a second axis, a swing axis of a head; and, when viewed from an axial direction, has a rectangular shape with a first direction as a short side direction and a second direction as a long side direction. The pivot post protrudes upward from an upper surface of the bottom plate at a position overlapping the second axis. The bottom plate has a thin bottom arranged in a radially outward direction orthogonal to the second axis of the pivot post and including at least one of a lower recess recessed upward from a lower surface of the bottom plate and an upper recess recessed downward from the upper surface of the bottom plate.

Abstract: A disk driving device includes a disk, a motor, an arm, a head, and a housing. The disk rotates about a rotation shaft extending in a vertical direction. The motor causing the disk to rotate. The arm swings about a swinging shaft which is disposed at a position different from the rotation shaft and which extends in the vertical direction. The head is disposed at a tip of the arm and is configured to perform reading or writing of information from or to the disk. The housing accommodates the disk, the motor, the arm, and the head. The housing includes a base plate, a cover, a pivot post, a tubular portion, and a screw. The base plate is a cast product and has a box shape including a bottom wall extending perpendicularly to the rotation shaft and an open top. The cover has a plate shape covering an opening of the base plate. The pivot post is a member separate from the base plate and protrudes upward from a top surface of the bottom wall along the swinging shaft.

Abstract: A base plate includes a support part, a bottom plate part, and a wall part. The wall part includes a first wall part and a second wall part above the first wall part. The first wall part includes a first wall surface and a support surface spreading from an upper end of the first wall surface to a radially outer side. The second wall part includes a second wall surface and a recess recessed to the radially outer side from the second wall surface. The recess is defined by a space enclosed by a recess wall surface located on the radially outer side of the second wall surface and extending upward from the support surface, a recess top surface connecting from an upper end of the recess wall surface to the second wall surface, and a recess support surface facing the recess top surface in an axial direction.

Abstract: A base plate is a portion of a housing of a disk driving device having a disk rotating with a rotation axis as a center, and is a cast product. The base plate has a bottom plate part and a peripheral wall part. The bottom plate part has a rectangular shape when viewed in an axial direction. The peripheral wall part extends from an outer peripheral edge of the bottom plate part toward a side of the axial direction to surround the periphery of the bottom plate part. A metal member embedded in the peripheral wall part is provided.

Abstract: A heat treatment furnace disclosed herein may include: a heat treatment unit configured to heat-treat an object; a cooling unit configured to cool the object heat-treated by the heat treatment unit; and a conveyor configured to convey the object in the heat treatment unit and the cooling unit. The cooling unit may include a housing, wherein the housing is disposed below a conveyance path on which the object is conveyed by the conveyor and configured to cool the object being conveyed by the conveyor by liquid flowing inside the housing. The housing may include an upper plate facing the object being conveyed by the conveyor. The upper plate may be tilted so that gas stays at a predetermined portion of the housing while the liquid is flowing in the housing.

Abstract: A base plate is a portion of a housing of a disk drive apparatus, including a base body being a casting product, and an electrodeposition coating film covering at least a portion of a surface of the base body. The base body includes a bottom plate rectangular as viewed from an axial direction, a pivot post, and a protrusion. The bottom plate extends perpendicular to a rotation axis of a disk that extends vertically and a swing axis of a head that is disposed in a different position from the rotation axis and that extends vertically. The head reads or writes information from or to the disk. The pivot post protrudes upward from an upper surface of the bottom plate along the swing axis. The protrusion is provided protruding radially outward from a peripheral surface of the pivot post and protruding to the upper surface of the bottom plate.

Abstract: A base plate is a portion of a housing of a disk drive apparatus, including a base body defined by a metal die cast member, and an electrodeposition coating film covering at least a portion of a surface of the base body. The base body includes a bottom plate rectangular as viewed from an axial direction, and a pivot post. The bottom plate extends perpendicular to a rotation axis of a disk and a swing axis of a head. The rotation axis extends vertically. The swing axis is disposed in a different position from the rotation axis and extends vertically. The head reads or writes information from or to the disk. The pivot post protrudes upward from an upper surface of the bottom plate along the swing axis, and a portion of the die cast member is segregated.

Abstract: A base plate includes a base body including a bottom plate and a pivot post, and an electrodeposition coating film. The bottom plate extends perpendicular to a first axis, a rotation axis of the disk, and a second axis, a swing axis of a head; and, when viewed from an axial direction, has a rectangular shape with a first direction as a short side direction and a second direction as a long side direction. The pivot post protrudes upward from an upper surface of the bottom plate at a position overlapping the second axis. The bottom plate has a thin bottom arranged in a radially outward direction orthogonal to the second axis of the pivot post and including at least one of a lower recess recessed upward from a lower surface of the bottom plate and an upper recess recessed downward from the upper surface of the bottom plate.

Abstract: A base plate is a portion of a housing of a disk drive apparatus, including a base body being a casting product, and an electrodeposition coating film covering at least a portion of a surface of the base body. The base body includes a bottom plate rectangular as viewed from an axial direction, a pivot post, and a protrusion. The bottom plate extends perpendicular to a rotation axis of a disk that extends vertically and a swing axis of a head that is disposed in a different position from the rotation axis and that extends vertically. The head reads or writes information from or to the disk. The pivot post protrudes upward from an upper surface of the bottom plate along the swing axis. The protrusion is provided protruding radially outward from a peripheral surface of the pivot post and protruding to the upper surface of the bottom plate.

Abstract: A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board.

Abstract: A base of a disk drive apparatus includes a bottom plate portion and a wall portion. The wall portion includes an increased thickness portion and a decreased thickness portion. An inner surface of the increased thickness portion includes a first slanting surface arranged to extend radially outward away from a central axis while extending axially away from the bottom plate portion. An inner surface of the decreased thickness portion includes a second slanting surface arranged to extend radially outward away from the central axis while extending axially away from the bottom plate portion, and protrude radially inward relative to the first slanting surface. An inclination angle of the second slanting surface with respect to an axial direction is arranged to be smaller than an inclination angle of the first slanting surface with respect to the axial direction.

Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.

Abstract: A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board.

Abstract: Provided is a piston ring such that it is possible to sufficiently inhibit adhesive wear when the piston ring is mounted to a piston for a diesel engine in which at least the piston ring groove in the piston is formed from steel or cast iron. Disclosed is a piston ring mounted to a piston for a diesel engine, wherein the load length ratio (Rmr2) (in accordance with JIS B0601:2001) of the top surface and bottom surface of the piston ring satisfies each of the following conditions: Rmr2 (0.5%, 0.3[mu]m)=20% and Rmr2 (0.5%, 0.4[mu]m)=40%.

Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.