Abstract: A seat-occupant restraining apparatus is provided which includes a bag, accommodated in a shoulder belt, for restraining a seat occupant in a seat, and when a vehicle collides, expands the bag with a high-pressure gas produced by an inflator. A relief valve, which opens according to an increase in the internal pressure of the bag, is provided in a gas passage for supplying the high-pressure gas from the inflator to the bag. If the bag is completely expanded by the high-pressure gas from the inflator and the internal pressure of the bag reaches an appropriate value, the relief valve opens and discharges an extra high-pressure gas from the bag, whereby the internal pressure of the bag can be controlled to the appropriate value without causing variations. According to the above-described constriction, it is possible to realize a stable air vent function superior to that of a vent hole, without providing a vent hole in the bag of an air belt assembly.

Abstract: A portion of a shoulder belt 6 of an air belt apparatus touching the breast portion of an occupant is composed of an inflatable rubber bag 12 shaped like a tube, a webbing 13 for covering the outside of the bag 12 so that tension is produced in case of a car collision, and a pad 28 for further covering the outside of the webbing 13. The pad 28 has a three-layer structure: the outermost layer is made from raised cloth 29 such as moquette, or the like, which feels pleasant to the touch; the intermediate layer is made from an urethane sheet 30 having elasticity; and the innermost layer is made from base cloth 31 for protecting the urethane sheet 30. The pad 28 has rifts 281 extending longitudinally. The pad 28 and an elastic element 32 made of a belt-like rubber sheet are sewed together with stitches 33 so that the rifts 281 and 281 are connected to each other. When the bag 12 is inflated in case of a car collision, the webbing 13 is inflated by the pressure of the bag 12.

Abstract: A seat-occupant restraining apparatus for a vehicle is provided that includes both an air bag and air bag inflator and an air belt and air belt inflator. An ignition controller controls the ignition of both the air bag and air belt inflators. An acceleration sensor is included. The ignition controller calculates the magnitude of the shock of collision, based on input from the acceleration sensor at the time of a collision of the vehicle by integrating the acceleration over a preset time, and the magnitude of the shock is compared with a first and second threshold, both of which are stored in advance. If the calculated shock is less than the first threshold, the ignition controller does not output an ignition signal to either the air bag or the air belt. For shocks between the two threshold values, the air belt assembly is operated. For shocks greater than the second threshold, both the air belt and the air bag are activated.

Abstract: A novel nucleic acid derivative represented by the following general formula (I) and physiologically acceptable salt thereof which are expected to have an antiviral activity: ##STR1## wherein B represents a nucleic acid base derivative; A.sup.1 and A.sup.2 represent, independently of each other, OR.sup.1 or OCOR.sup.1 ; R.sup.1 represents a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; l represents a number of 0 or 1; and m and n each represents an integer of 0-2; provided that when l and m are 0, n is 0 or 2.

Abstract: This invention relates to cyclobutane derivatives represented by the following general formula (1) and physiologically acceptable salts thereof: ##STR1## wherein B represents a nucleic acid base derivative, R.sup.1 and R.sup.2 independently represent hydrogen atom, dialkylaminoacyl group, 1,4-dihydro-1-methylnicotinoyl group or substituted phosphoric acid group, provided that either one of R.sup.1 and R.sup.2 is a group other than hydrogen atom.The compounds of this invention exhibit a high oral absorbability and are metabolized in vivo into the compounds of formula (1a). Accordingly, the compounds of this invention are expectedly useful as antiviral agent.