摘要:
A tapping screw engages a member to be engaged with a base plate made of metal by tapping a burring hole formed on the base plate. The tapping screw includes a main body having a shank and a head formed at a base end of the shank. A reduced diameter shank portion extends from a fore end portion of the shank of the main body, and has a taper angle .theta. of 9.degree. to 14.degree. and a substantially rounded triangle shaped cross-section. Recesses having no thread are formed at three faces of the reduced diameter shank portion so that a circumferential width of each recess is gradually reduced toward a tip end of the reduced diameter shank portion. Each recess is formed by a steep face facing a screwing direction of the tapping screw and a gentle face oppositely facing the steep face to form a groove.
摘要:
Provided is a catalytic converter in which the entire catalyst constituting the catalytic converter can be efficiently utilized to purify exhaust gas, and the emission of hydrogen sulfide can be suppressed.A catalytic converter 10 includes catalyst layers 2A, 2B formed of a noble metal catalyst that are formed on cell wall surfaces of a substrate 1 having a cell structure in a longitudinal direction of the substrate 1 in which gas flows, in which the substrate 1 has a center region 1A having a relatively high cell density and a peripheral region 1B having a relatively low cell density, and lengths of the catalyst layers 2A, 2B of the center region 1A and the peripheral region 1B in the longitudinal direction are the same as each other, or the length of the catalyst layer 2B in the longitudinal direction is shorter than that of the catalyst layer 2A.
摘要:
A light scanning apparatus including a light source for emitting light in a direction different from a direction orthogonal to the reference direction, and a rotating reflection body that rotates about an axis inclined at an inclination angle φ to the reference direction and includes at least one reflecting surface that is disposed in a direction intersecting obliquely with the axis and reflects light incident on the reflecting surface at an incident angle θ. A specific scanning direction is a direction intersecting at an angle to the reference direction and the rotation axis inclination angle φ≠0°. The inclination angle φ is predetermined according to the incident angle θ such that deviation of the scanning beam reflected by the reflecting surface is smaller than the deviation of the scanning beam that would be obtained with the inclination angle φ of the rotation axis 0°.
摘要:
An on-vehicle laser radar device scans laser light in front and side zones through the windshield glass of a vehicle in a horizontal direction in order to detect an obstacle. When projecting the laser light emitted from the light source to the windshield glass, the device rotates a polarization plane of the laser light according to the angle of inclination of the windshield glass and an azimuth angle in the horizontal direction, and outputs the polarized laser light through the windshield glass in order to scan the laser light toward front and side visual zones of the vehicle.
摘要:
To provide a semiconductor storage device capable of reducing the number of ECC bits. A semiconductor storage device according to an embodiment of the invention includes a memory cell array, an ECC cell storing ECC bits, and an ECC computating circuit calculating the ECC bits, which calculates first ECC bits as the ECC bits for first data including at least one write data and a part of read data that is read from the memory cell array.
摘要:
A semiconductor storage device of the present invention includes a unit for determining a pulse width by using a command input signal as a start point and thereby making a sense-amplifier activation signal or a latch capture signal of a synchronous mask ROM synchronize with activation or inactivation of a clock signal after cycles corresponding to the number of clocks of a set latency to generate timing.
摘要:
A modular clutch includes a flywheel 2, a clutch cover assembly 3 and a clutch disk assembly 4, which form a single module that in one embodiment is installed directly onto the crankshaft of an engine, and in an alternate embodiment is attached to a flex plate. The modular clutch is configured to be installed and replaced as a unit. The clutch cover assembly 3 has a clutch cover 21, a pressure plate 22 and diaphragm spring 23. The clutch disk assembly 4 has a clutch engagement portion 31 made of a metallic sintered body.
摘要:
A core drill of dry type used for drilling through concrete structure or the like. A main shaft 23 rotatably driven by a motor 33 with a fan 32 is provided with a rubber ring 27 for allowing axial vibration of the shaft, and loosely supported by bearings 25 and 26 with a clearance between them so that it can be slightly tilted in the lateral and transverse directions. During drilling, a spacing between a diamond tip in a leading end of the core bit and a concrete structure or the like is changed as the core bit is moved in the vertical direction and tilted in the lateral and transverse direction, and chips produced by the drilling operation are efficiently discharged by injecting air from the fan 32 through an axial bore 22 in the shaft 23.
摘要:
This invention is intended to ensure that an exhaust gas purification device with an NOx storage reduction catalyst and a particulate filter is able to fully utilize an original NOx storage capability of the NOx storage reduction catalyst. For this end, in addition to the filter 40 disposed upstream relative to the NOx storage reduction catalyst 22, the purification device includes a fuel supply element 42 for supplying a fuel so that the fuel is mixed with exhaust gas that flows into the filter, and an ozone feeder 30 for supplying ozone so that the ozone is mixed with exhaust gas that flows into the NOx storage reduction catalyst at a downstream position relative to the filter 40.
摘要:
In a master-slice-type semiconductor integrated circuit having a bulk layer on which a plurality of bulk patterns to realize specific circuit functions are formed, and a plurality of wiring layers including variable wiring patterns of which wiring pattern is changeable by a user and fixed wiring layers of which wiring patterns are unchangeable by the user, a plurality of bulk patterns are previously fixed and placed on an entire chip surface where bulk patterns are capable of being formed in the bulk layer, and thereby, a semiconductor integrated circuit corresponding to a use purpose can be manufactured by only designing the wirings of the variable wiring layers and producing masks for forming the designed wirings in the wiring layers at the user side.