Abstract: An artificial body vessel to be inserted into a human organ is collapsed and introduced into a catheter, which is brought to a required position in the human organ, where the artificial body vessel is released therefrom. A pair of foldable, elastic wire rings 10 are provided at the opposite ends of the artificial body vessel. A plurality of connecting wire rings bridge the end wire rings 10. A plurality of intermediate wire rings 12 bind and keep the connecting wire rings 11 transformed in a generally elliptical shape. The end wire rings 10, the intermediate wire rings 12 and the connecting wire rings 11 are folded by means of a string passed through loops to collapse the artificial body vessel 7. The collapsed artificial body vessel 7 is inserted into a catheter.

Abstract: An artificial body vessel to be inserted into a human organ is collapsed and introduced into a catheter, which is brought to a required position in the human organ, where the artificial body vessel is released therefrom. A pair of foldable, elastic wire rings 10 are provided at the opposite ends of the artificial body vessel. A plurality of connecting wire rings bridge the end wire rings 10. A plurality of intermediate wire rings 12 bind and keep the connecting wire rings 11 transformed in a generally elliptical shape. The end wire rings 10, the intermediate wire rings 12 and the connecting wire rings 11 are folded by means of a string passed through loops to collapse the artificial body vessel 7. The collapsed artificial body vessel 7 is inserted into a catheter.

Abstract: Disclosed herein is a double lumen catheter assembly having an expandable or inflatable balloon element which can be fully stretched longitudinally while preventing stretching of the catheter outer and inner tubes. The balloon element is fixedly attached at its respective ends to the open distal ends of the outer and inner tubes. An elongated flexible pusher member is adapted to be inserted into the inner catheter tube when the stretching of the balloon element is required. The pusher member has a hardness greater than the catheter tubes. When inserted into the inner catheter tube and moved relative to the outer catheter tube, the pusher member comes into abutting enagement with a rigid stop member provided in the distal end of the inner catheter tube. Continued forward movement of the pusher member relative to the outer catheter tube causes the balloon element to be stretched longitudinally into a geometric shape that provides for easy insertion into a blood vessel.

Abstract: The device of the invention is provided with a pair of patches each comprising a resilient, foldable annular frame and a piece of cloth stretched over and fixed to the frame. The patches are so arranged as to face each other across a gap and sewed together concentrically with a thread slightly inwardly of the outer circumferential edge thereof in such a manner that as the thread is pulled, the two patches are moved so as to approach each other.

Abstract: Disclosed herein is a double lumen catheter assembly having an expandable or inflatable balloon element which can be fully stretched longitudinally while preventing stretching of the catheter outer and inner tubes. The balloon element is fixedly attached at its respective ends to the open distal ends of the outer and inner tubes. An elongated flexible pusher member is adapted to be inserted into the inner catheter tube when the stretching of the balloon element is required. The pusher member has a hardness greater than the catheter tubes. When inserted into the inner catheter tube and moved relative to the outer catheter tube, the pusher member comes into abutting engagement with a rigid stop member provided in the distal end of the inner catheter tube. Continued forward movement of the pusher member relative to the outer catheter tube causes the balloon element to be stretched longitudinally into an geometric shape that provides for easy insertion into a blood vessel.

Abstract: A hollow stabilizer manufactured from a material obtained by adding a minute amount (0.001-0.01% by weight) of boron to either a carbon steel tubing having a relatively low carbon concentration of 0.20-0.35% for mechanical and structural purposes or to a carbon steel tubing for general structural purposes. The carbon steel tubing thus provided is bent in a prescribed stabilizer form. The bent tubing is water quenched, for example, to a greater hardness than HRC 43. The water-hardened bent tubing is later tempered to a hardness HRC, ranging between 36 and 43, at a temperature of, for example, 300.degree.-380.degree. C. for a proper length of time. The hollow stabilizer obtained by the aforementioned heat-treating steps has a much greater fatigue strength.

Abstract: A car stabilizer and a manufacturing method therefor are disclosed. In this method, a straight elongated starting material of carbon steel with a carbon content of 0.10% to 0.35% is first directly quenched by quick heating, and then bent into a predetermined shape. Thereafter, the material is annealed at a low temperature of 100.degree. C. to 400.degree. C., shot-peened as required, and then coated. Thus, a stabilizer is obtained as a final product. The coating may be executed between the steps of quenching and bending.

Abstract: The stabilizer according to the invention is made from a single pipe, and it comprises a torsion section coupled to a vehicle frame, curved sections integrally extending from the opposite ends of the torsion section and arm sections each integrally extending from each of the curved sections and coupled to a wheel suspension. Each of the curved sections has a flat section extending in the plane of action of the bending load applied to it.

Abstract: The hollow stabilizer is made from a single pipe and has a torsion section coupled to a vehicle, curved sections each integrally extending from each end of the torsion section, and arm sections each integrally extending from each of the curved sections. All these sections have the same outer diameter, and the curved sections have an increased thickness compared to the rest of the stabilizer.

Abstract: A hollow stabilizer embodying the invention is made of a curved welded metal pipe. The seam of the welded pipe takes a specific position which is determined by the ratio of the layer thickness of the pipe to the outer diameter thereof and by the ratio of the radius of curvature of the curved section thereof to the outer diameter thereof. In case both ratios are relatively large, the seam is so positioned that it extends along a curve having as small or large a curvature as possible and that an angle of about 30.degree. at most is defined by a line passing the axis of the pipe and the center of curvature thereof and a line passing the axis and the seam of the pipe. In case both ratios are relatively small, the seam is so positioned that it extends along a curve having as small a curvature as possible and that an angle of 45.degree. at most is defined by said lines.

Abstract: A stabilizer for a vehicle comprises a torsion section, hardened and tempered curved sections integrally extending from the opposite ends of the torsion section and arm sections each integrally extending from each curved section and coupled to a vehicle suspension.

Abstract: Disclosed is an improved balloon catheter having a three-layer balloon tube fixed to and enclosing an apertured end of an elongated flexible fine tube. The three-layer composite balloon tube is composed of inner and outer rubber tubes and an intervenient cloth bag, which is effective to hold the shape and size of the expanding balloon appropriately for the purpose and to raise and keep the inner-pressure of the expanding balloon at an elevated value without any fear for rupturing a hollow organ of a human body. A pair of rubber bands are dispersed about portions of the balloon to initially restrict expansion of said portions at a stenosis of the hollow organ.

Abstract: A green tire building process comprises: the steps of: jointing both longitudinal ends of a belt-like tread rubber for producing an endless tread band, and applying the endless tread band on an inner periphery of an annular face: jointing both longitudinal ends of a belt-like breaker ply for producing an endless breaker band, and disposing the endless breaker band within said endless tread band with its mid-circumferential plane being aligned with that of said endless tread band; expanding the endless breaker band radially and applying the endless breaker band on the inner periphery of the endless tread band for building a tread breaker assembly; disposing a cylindrical green case within and in coaxial relation with the tread breaker assembly; deforming the cylindrical green case toroidally to be applied on the inner periphery of the endless breaker band for integrally building the cylindrical green case and the tread breaker assembly.