Abstract:
A multi-cylinder internal combustion engine comprising: first and second crankshafts disposed apart from and parallel with each other; first and second pistons operatively connected to the first and second crankshafts through connecting rods, respectively; and first and second cylinders for slidably accommodating therein the first and second pistons, respectively, both the crankshafts being interlocked with each other to rotate synchronously, the first and second cylinders being disposed adjacent to each other in the axial directions of the crankshafts. Vibrations due to the primary inertial force can be eliminated or alleviated without using a special balancer shaft. The size and weight of the engine are greatly reduced as compared with a conventional horizontally opposed type or V type engine.
Abstract:
A valve driving apparatus in an internal combustion engine having plural valve stems in a cylinder head on an upper portion of a main body of an engine which are aligned radially about the cylinder head with the intersection of their longitudinally axes substantially coinciding with a center of curvature of an upper wall surface of a combustion chamber, the valve stems being arranged to be driven by at least one cam shaft through respective subsidiary rocker arms which are in abutment with respective heads of the valve stems and respective rocker arms which are in abutment with the subsidiary rocker arms, characterized in that a shaft for each of the subsidiary rocker arms is positioned on a plane crossing a longitudinal axis of the corresponding one of the valve stems at a right angle and existing in a range of up and down stroke of the head of the valve stem.
Abstract:
A pressure sensor for detecting a pulse wave, a digital conversion unit for converting a pressure signal from the pressure sensor into a digital signal, and a fourth derivative filter having an adjustable frequency characteristic for obtaining a fourth derivative wave of an original waveform based on the digital signal generated by the conversion by the digital conversion unit are provided. Local extrema of the fourth derivative wave in a section of the pulse wave corresponding to one beat are calculated. Based on the calculated local extrema, an early systolic component and a late systolic component are calculated.
Abstract:
A pressure sensor for detecting a pulse wave, a digital conversion unit for converting a pressure signal from the pressure sensor into a digital signal, and a fourth derivative filter having an adjustable frequency characteristic for obtaining a fourth derivative wave of an original waveform based on the digital signal generated by the conversion by the digital conversion unit are provided. Local extrema of the fourth derivative wave in a section of the pulse wave corresponding to one beat are calculated. Based on the calculated local extrema, an early systolic component and a late systolic component are calculated.
Abstract:
A pressing cuff presses a pressure sensor above an artery. The level of the pressure applied to the pressure sensor is changed while the pulse wave is measured based on information about the pressure from the pressure sensor. In order to adjust the level of the applied pressure using the pressure of gas in the pressing cuff, a three-port valve and a two-port valve are controlled so that the connection is changed to establish a state of holding the amount of the gas in the pressing cuff. Then, the state is changed to a state of isolating and discharging gas in which a part of the held gas is isolated from the remaining amount of the gas to be discharged. Then, the state is changed to the state of holding the remaining amount of gas in the pressing cuff.
Abstract:
To provide a cuff for a blood pressure monitor having a curled elastic member which is easily attached to an arm, does not make the subject feel pain when attached, and exhibits a characteristic of excellent fitting. A curled elastic member 1A has one end portion 12 extending outward so as to enwind the other end portion 11 inward. Specifically, from the other end portion 11 to a position where the other end portion 11 is mutually opposite, the radius of curvature gently increases. From the mutually opposite portion to the one end portion 12, the radius of curvature largely increases.
Abstract:
A process for producing a benzoylacrylic acid derivative (formula 1) in high yield through a small number of steps and a simple purification step. The process comprises reacting 2,4,5-trifluoro-3-methyl-6-nitrobenzoyl chloride with a compound (formula 2) to yield an aminoacrylic acid derivative (formula 1) and then reacting the aminoacrylic acid derivative (formula 1) with an amine derivative represented by R2—NH2, wherein R2 is a cycloalkyl group or the like.
Abstract:
A blood pressure monitor includes a cuff to be worn on a living body portion provided with an air component for inflating and deflating said cuff, and a main body detachably mounted on the cuff provided with an electrical component, in which the main body is electrically connected with the cuff by wire or wireless.