Abstract: A syrup composition of the present invention comprises a mixture of monomers (A), each having a molecular mass of 130 to 300 and one (meth)acryloyl group; a resin (C) which is soluble in the monomers (A) and has a glass transition temperature of 20 to 155° C.; a wax (D); and a tertiary amine (E), wherein the monomers (A) contain a heterocyclic ring-containing (meth)acrylate (a1), an oligoethylene glycol monoalkyl ether (meth)acrylate (a2), and a hydroxyalkyl (meth)acrylate (a3) having a hydroxyalkyl group with 2 or 3 carbon atoms. The syrup composition does not substantially contain a polyvalent metal soap.

Abstract: A syrup composition of the present invention comprises a mixture of monomers (A), each having a molecular mass of 130 to 300 and one (meth)acryloyl group; a resin (C) which is soluble in the monomers (A) and has a glass transition temperature of 20 to 155° C.; a wax (D); and a tertiary amine (E), wherein the monomers (A) contain a heterocyclic ring-containing (meth)acrylate (a1), an oligoethylene glycol monoalkyl ether (meth)acrylate (a2), and a hydroxyalkyl (meth)acrylate (a3) having a hydroxyalkyl group with 2 or 3 carbon atoms. The syrup composition does not substantially contain a polyvalent metal soap.

Abstract: An electro-pneumatic air pressure regulator includes a primary pressure introduction port, a secondary pressure output port, a pilot pressure chamber, a main valve for opening and closing a communicating conduit, a floating piston which actuates the main valve, a nozzle conduit via which the pilot pressure chamber is communicatively connected to the atmosphere, a flapper which includes a leaf spring facing an open end of the nozzle conduit, and an electromagnetic drive system which deforms the leaf spring to vary a position of the flapper relative to the open end of the nozzle conduit in accordance with the magnitude of an analogue input signal. The flapper includes a conical projection which projects toward the open end of the nozzle conduit. A conical recess corresponding to the conical projection is formed on an end face of the nozzle conduit around the open end thereof.

Abstract: A vibration isolation table includes a stationary housing having an opening on a top surface thereof; a primary movable base which is supported by the stationary housing, and includes a bottomed hollow cylindrical portion which extends downwards into the stationary housing, and a flange portion which projects radially outwards from an upper end of the bottomed hollow cylindrical portion; a pressure chamber formed between the flange portion and the top surface of the stationary housing; and a vibration-free movable base on which an object to be isolated from vibration is mounted, the vibration-free movable base having a swingable rod which is inserted into the bottomed hollow cylindrical portion so that a bottom end of the swingable rod is supported by a base of the bottomed hollow cylindrical portion in a manner to allow the swingable rod to swing with respect to the bottomed hollow cylindrical portion.

Abstract: A vibration isolation table includes a stationary housing having an opening on top thereof; a pressure-tight flexible member which closes the opening to form a first pressure chamber in the stationary housing; a primary movable base which is coupled to a central portion of the pressure-tight flexible member, the primary movable base having a bottomed hollow cylindrical member; an intermediate movable base having a swingable rod which is inserted into the bottomed hollow cylindrical member so that a bottom end of the swingable rod is supported thereby to allow the swingable rod to swing with respect to the bottomed hollow cylindrical member; and a vibration-free base on which an object to be isolated from vibration is mounted, a second pressure chamber being formed between the intermediate movable base and the vibration-free base, the second pressure chamber being capable of expanding and contracting vertically.

Abstract: An electro-pneumatic air pressure regulator includes a primary pressure introduction port, a secondary pressure output port, a pilot pressure chamber, a main valve for opening and closing a communicating conduit, a floating piston which actuates the main valve, a nozzle conduit via which the pilot pressure chamber is communicatively connected to the atmosphere, a flapper which includes a leaf spring facing an open end of the nozzle conduit, and an electromagnetic drive system which deforms the leaf spring to vary a position of the flapper relative to the open end of the nozzle conduit in accordance with the magnitude of an analogue input signal. The flapper includes a conical projection which projects toward the open end of the nozzle conduit. A conical recess corresponding to the conical projection is formed on an end face of the nozzle conduit around the open end thereof.

Abstract: A vibration isolation table includes a stationary housing having an opening on a top surface thereof; a primary movable base which is supported by the stationary housing, and includes a bottomed hollow cylindrical portion which extends downwards into the stationary housing, and a flange portion which projects radially outwards from an upper end of the bottomed hollow cylindrical portion; a pressure chamber formed between the flange portion and the top surface of the stationary housing; and a vibration-free movable base on which an object to be isolated from vibration is mounted, the vibration-free movable base having a swingable rod which is inserted into the bottomed hollow cylindrical portion so that a bottom end of the swingable rod is supported by a base of the bottomed hollow cylindrical portion in a manner to allow the swingable rod to swing with respect to the bottomed hollow cylindrical portion.

Abstract: A vibration isolation table includes a stationary housing having an opening on top thereof; a pressure-tight flexible member which closes the opening to form a first pressure chamber in the stationary housing; a primary movable base which is coupled to a central portion of the pressure-tight flexible member, the primary movable base having a bottomed hollow cylindrical member; an intermediate movable base having a swingable rod which is inserted into the bottomed hollow cylindrical member so that a bottom end of the swingable rod is supported thereby to allow the swingable rod to swing with respect to the bottomed hollow cylindrical member; and a vibration-free base on which an object to be isolated from vibration is mounted, a second pressure chamber being formed between the intermediate movable base and the vibration-free base, the second pressure chamber being capable of expanding and contracting vertically.

Abstract: The present invention relates to a repair and reinforcement method for preexisting structures such as buildings or the like, and in particular, relates to a repair and reinforcement method for concrete structures, and to an anisotropic textile employed in this method. The present invention provides a method which permits execution even in low temperature conditions, and which moreover exhibits superior repair and reinforcement effects in a short period of time; during the impregnation of a resin into a sheet material comprising reinforcement fibers and the curing of this resin to form a fiber-reinforced resin layer which is used in the repair and reinforcement of preexisting structures, a reactive mixture having a gelling period of 15 minutes or more at a temperature of 20° C. and which polymerizes even at 5° C.

Abstract: The present invention relates to a repair and reinforcement method for preexisting structures such as buildings or the like, and in particular, relates to a repair and reinforcement method for concrete structures, and to an anisotropic textile employed in this method. The present invention provides a method which permits execution even in low temperature conditions, and which moreover exhibits superior repair and reinforcement effects in a short period of time; during the impregnation of a resin into a sheet material comprising reinforcement fibers and the curing of this resin to form a fiber-reinforced resin layer which is used in the repair and reinforcement of preexisting structures, a reactive mixture having a gelling period of 15 minutes or more at a temperature of 25° C. and which polymerizes even at 5° C.

Abstract: Disclosed is a radiation curable resin composition permitting good dispersion of magnetic powders and forming a highly durable cured film, and hence suitable for use in the formation of magnetic recording media. This resin composition consists essentially of a urethane (meth)acrylate obtained by the reaction of(A) a hydroxyl-containing compound (I) composed of an amido hydroxy compound (a.sub.1) having at least one amido group and at least one isocyanate-reactive hydroxyl group in the molecule, and at least one polyol compound (a.sub.2) selected from polyester polyols, polyether polyols and alkyl polyols, the number of moles (x.sub.1) of the hydroxyl groups present in the amido hydroxy compound (a.sub.1) being from 5 to 80% of the total number of moles of the hydroxyl groups contained in component (A) and the number of moles (x.sub.2) of the hydroxyl groups present in the polyol compound (a.sub.

Abstract: A pneumatically-operated valve in which a valve actuator is formed of two separate parts: a driving member having a plurality of sealed pistons fixed to a piston rod in series to be operated by air pressure, and a valve operating member which comes into contact with a clean fluid and which does not have any soft substances such as O-rings which are likely to be impaired by ultrasonic cleaning. The valve facilitates the cleaning of the members during the process of manufacture and furthermore can provide a great deal of output for its size without contaminating the clean fluid during use.

Abstract: A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of the passage block open into the end face of the passage block adjacent to the control block through respective fluid passages. The pilot pressure is exerted on the diaphragm by the pilot pressure passages to control the fluid connection between the ports of the passage block. The fluid passages are located in a concentric arrangement.The diaphragm has a center valve portion with an annular valve portion therearound. The two valve portions can be independently controlled by the pilot pressure acting thereon to control the fluid connection between the two adjacent fluid passages.

Abstract: A pneumatically-operated valve in which a valve actuator is formed of two separate parts: a driving member having a plurality of sealed pistons fixed to a piston rod in series to be operated by air pressure, and a valve operating member which comes into contact with a clean fluid and which does not have any soft substances such as O-rings which are likely to be impaired by ultrasonic cleaning. The valve facilitates the cleaning of the members during the process of manufacture and furthermore can provide a great deal of output for its size without contaminating the clean fluid during use.

Abstract: A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of the passage block open into the end face of the passage block adjacent to the control block through respective fluid passages. The pilot pressure is exerted on the diaphragm by the pilot pressure passages to control the fluid connection between the ports of the passage block. The fluid passages are located in a concentric arrangement. The diaphragm has a center valve portion with an annular valve portion therearound. The two valve portions can be independently controlled by the pilot pressure acting thereon to control the fluid connection between the two adjacent fluid passages.

Abstract: A fluid directional control valve having a valve housing with valve chamber therein, an elastic seal ring for sealing the valve chamber, valve ports provided in the housing and connected to the valve chamber, a valve arm having valve bodies and swingably supported in and by the seal ring, and an actuator for actuating the valve arm, so that the valve bodies selectively open and close the valve ports in order to control the fluid connection between the valve ports, in accordance with the swing movement of the valve arm.

Abstract: A pilot operated directional control valve having a diaphragm held between a passage block which has a feeding port, at least one loading port and at least one discharge port, and an opposed control block which has pilot pressure passages. The ports of the passage block open into the end face of the passage block adjacent to the control block through respective fluid passages. The pilot pressure is exerted on the diaphragm by the pilot pressure passages to control the fluid connection between the ports of the passage block. The fluid passages are located in a concentric arrangement. The diaphragm has a center valve portion with an annular valve portion therearound. The two valve portions can be independently controlled by the pilot pressure acting thereon to control the fluid connection between the two adjacent fluid passages.