Abstract: A case for housing a driving force transmission device includes a wall section defining a through-hole through which a shaft is configured to pass. The wall section, as viewed from an axial direction, includes an annular section surrounding the through-hole, first ribs that extend radially outward from the annular section, a second rib that crosses a vertical line that passes through an axial center of the shaft from one side to the other side, and a recess that opens at a bottom end surface of the wall section, and recessed in a direction along the vertical line. A bottom surface of the recess has a shape such that a side farther from the vertical line is located closer to a bottom end surface side. A region of the wall section in which the recess is provided is connected to one end of the second rib.

Abstract: A case that houses a drive force transmission device includes a circular ring part, fastening boss parts, first ribs, a non-fastening boss part, and a second rib. The circular ring part defines an opening through which a shaft is configured to be inserted. The fastening boss parts are provided around the circular ring part. Fastening members are to be secured to the fastening boss parts. The first ribs are respectively formed between a portion of the fastening boss parts and the circular ring part when viewed from an axial direction of the shaft. The non-fastening boss part is provided between adjacent ones of the fastening boss parts to which the first ribs are not connected, when viewed from the axial direction. A fastening member is not configured to be secured to the non-fastening boss part. The second rib is formed between the non-fastening boss part and the circular ring part.

Abstract: A first multi-plate brake device and a second multi-plate brake device are arranged side by side in a direction of a rotating axis X along an inner peripheral surface of a transmission case. In the second multi-plate brake device, the snap ring is supported by a supporting portion which is formed on the first multi-plate brake device side of the snap ring and protrudes from the inner peripheral surface of the transmission case radially inward to the rotating axis X. The piston retainer of the first multi-plate brake device includes an abutting portion that protrudes to the second multi-plate brake device side and abuts the supporting portion from the opposite side of the snap ring of the second multi-plate brake device. The abutting portion includes a thick portion whose radial thickness on a lower side in a vertical direction is increased as compared to on an upper side in the vertical direction based on a state of mounting the automatic transmission on a vehicle.

Abstract: A first multi-plate brake device and a second multi-plate brake device are arranged side by side in a direction of a rotating axis X along an inner peripheral surface of a transmission case. In the second multi-plate brake device, the snap ring is supported by a supporting portion which is formed on the first multi-plate brake device side of the snap ring and protrudes from the inner peripheral surface of the transmission case radially inward to the rotating axis X. The piston retainer of the first multi-plate brake device includes an abutting portion that protrudes to the second multi-plate brake device side and abuts the supporting portion from the opposite side of the snap ring of the second multi-plate brake device. The abutting portion includes a thick portion whose radial thickness on a lower side in a vertical direction is increased as compared to on an upper side in the vertical direction based on a state of mounting the automatic transmission on a vehicle.

Abstract: A liquid absorption member includes a jointed body in which a plurality of cells are provided between partition members by jointing a plurality of the partition members with each other, and a liquid holding material which is filled into the cell and holds liquid. A plurality of diffusion paths in which attached liquid is diffused and flows are configured in the partition member, and a density of the partition member is a lower density than a density of the liquid holding material.

Abstract: A liquid absorption member includes a jointed body in which a plurality of cells are provided between partition members by jointing a plurality of the partition members with each other, and a liquid holding material which is filled into the cell and holds liquid. A plurality of diffusion paths in which attached liquid is diffused and flows are configured in the partition member, and a density of the partition member is a lower density than a density of the liquid holding material.

Abstract: The current coefficient and saturation brightness of a phosphor is increased by coating the surfaces of phosphor particles (11, 21, 41) constituting a powdered phosphor with layers (12, 22, 42), preferably composed of phosphor, of 5 .mu.m, or less in thickness. A cathode-ray tube using this phosphor has a high luminance and/or a high resolution. If the above phosphor contains phosphor particles covered with electrically conductive phosphor and is used for an electroluminescence device or a vacuum fluorescent display, the life time and stability are improved.

Abstract: A green-emitting phosphor of Tb-activated oxide, which is represented by the compositional formula:(Y.sub.l-x-y-z Tb.sub.x Yb.sub.yD.sub.z).sub.3 (Al.sub.l-w Ga.sub.w).sub.5 O.sub.12wherein D is at least one element selected from the group consisting of Sc and La, and x, y, z and w are numbers satisfying the following conditions:1.times.10.sup.-2 .ltoreq.x.ltoreq.2.times.10.sup.-11.times.10.sup.-6 .ltoreq.y.ltoreq.2.times.10.sup.-21.times.10.sup.-4 .ltoreq.z.ltoreq.5.times.10.sup.-10.ltoreq.w.ltoreq.1,and which contains from 1.times.10.sup.-5 to 1.times.10.sup.-2 gram atom of barium element per mol of the phosphor and is capable of emitting a color within the following range by CIE chromaticity coordinates:0.325.ltoreq.X.ltoreq.0.3600.540.ltoreq.Y.ltoreq.0.625.