Abstract: There is provided a medical device, especially an indwelling needle with a branch tube, in which the construction is simple, the operation can be performed easily in a short period of time, and misoperation is less liable to occur, thus a medical accident being less prone to take place. In the medical device, a first case portion fitted with a check valve therein and provided with a flexible portion having a pressing button and a second case portion connecting with the first case portion on the inflow side of the check valve are separate parts. The medical device is characterized by having a branch tube which extends to the side of the second case portion and the interior of which communicates with the hollow portion of the second case portion.

Abstract: A blood collecting device according to the present invention is a blood collecting device, wherein a columnar liquid absorber, which contains a blood coagulation preventing solution, has a slit, and temporarily absorbs a predetermined amount of blood without coagulation is disposed at a tip end, and a pressing body which presses a rear surface of the liquid absorber to separate the liquid absorber is provided.

Abstract: A first object of the invention is to provide a medical device capable of effectively preventing backwards flow of blood.

Abstract: A press die set includes a hollow cylindrical guide bush mounted on a punch holder, a cylindrical retainer received within the guide bush, and a columnar guide post vertically mounted on a die holder and received within the retainer. First right angle grooves are formed on the outer surface of the guide post parallel to a longitudinal axis of the guide post. First planar surfaces are formed on an outer surface of the guide post parallel to the longitudinal axis of the guide post and perpendicular to a radius of the guide post. Second right angle grooves are formed on the inner surface of the guide bush parallel to a longitudinal axis of the guide bush. Second planar surfaces are formed on the inner surface of the guide bush parallel to the longitudinal axis of the guide bush and perpendicular to a radius of the guide bush. Cross roller bearings are positioned between the first and second right angle grooves, and plain roller bearings are positioned between the first and second planar surfaces.

Abstract: The bottoms 225 of circumferential groove 22 are equidistant from the axis of rotation 215 and constitute the sides of the column, the axes of rotation of which are common. The sides 226 and 227 of the circumferential groove 22 are not normal to the axis of rotation 215, and are beveled to form an acute angle to the bottom 225. That is, the sides 226 and 227 of the circumferential groove 22 form sides of cones the axes of rotation of which are common. The width of the circumferential groove 22 becomes widened from the surface to the inside. Resin 26 is coated on the surface of the circumferential groove 22 in such a manner that the coated surface has a substantially constant width. In this embodiment, a nylon type resin is coated with little peeling-off during use of the roller.