Abstract: A first tube is a medical tube provided with a first portion, a second portion and a third portion in this order from the proximal end side toward the distal end side and is made of a resin. At the second portion, the outer diameter is smaller than the outer diameter of the first portion and the inner diameter is substantially equal to the inner diameter of the first portion. At the third portion, the outer diameter and the inner diameter are respectively smaller than the outer diameter and the inner diameter of the second portion. In this manner, a medical tube in which the outer diameter of the proximal end side is relatively large and the outer diameter of the distal end side is relatively small while securing the inner diameter having a sufficient size at the distal end side can be provided.

Abstract: A medical tube includes a first portion, a second portion, a third portion, and a fourth portion in this order from a proximal side to a distal side thereof. The first portion has a tubular resin layer, the second portion has a tubular inner layer and outer layer, the third portion as an inner layer and outer layer, and the fourth portion has a tubular resin layer. When flexural rigidity of the first portion, the second portion, the third portion, and the fourth portion is G1, G2, G3, and G4, respectively, the flexural rigidity of each portion being configured to have a relationship with each other portion based upon the following expression (1): G1>G2>G3>G4??(1).

Abstract: A housing of an axial piston device is provided with a drain port for discharging the retained oil to the outside and a supply oil passage for guiding lubricating oil, which has been supplied from an oil source, toward a first hydraulic axial piston member. The drain port is arranged so as to bring about such a retained-oil level that a second hydraulic axial piston member, which is disposed below the first hydraulic axial piston member, is partially or entirely immersed in the retained oil while the first hydraulic axial piston member is not immersed in the retained oil.

Abstract: In a hydrostatic transmission (HST), a lubricating fluid passage is formed in an input shaft and has a pair of radially opposite lubricating fluid spill ports open at an outer peripheral surface of the input shaft. Both of the radially opposite lubricating fluid spill ports face a lubricated object of the HST. The lubricating fluid passage includes an axial fluid passage and a pair of radial fluid passages that are extended radially from the axial fluid passage to the outer peripheral surface of the input shaft so as to be radially opposite each other. Open ends of the respective radial fluid passages at the outer peripheral surface of the input shaft serve as the respective radially opposite lubricating fluid spill ports.

Abstract: A housing of an axial piston device is provided with a drain port for discharging the retained oil to the outside and a supply oil passage for guiding lubricating oil, which has been supplied from an oil source, toward a first hydraulic axial piston member. The drain port is arranged so as to bring about such a retained-oil level that a second hydraulic axial piston member, which is disposed below the first hydraulic axial piston member, is partially or entirely immersed in the retained oil while the first hydraulic axial piston member is not immersed in the retained oil.

Abstract: A medical tube includes a first portion, a second portion, a third portion, and a fourth portion in this order from a proximal side to a distal side thereof. The first portion has a tubular resin layer, the second portion has a tubular inner layer and outer layer, the third portion as an inner layer and outer layer, and the fourth portion has a tubular resin layer.

Abstract: In a hydrostatic transmission (HST), a lubricating fluid passage is formed in an input shaft and has a pair of radially opposite lubricating fluid spill ports open at an outer peripheral surface of the input shaft. Both of the radially opposite lubricating fluid spill ports face a lubricated object of the HST. The lubricating fluid passage includes an axial fluid passage and a pair of radial fluid passages that are extended radially from the axial fluid passage to the outer peripheral surface of the input shaft so as to be radially opposite each other. Open ends of the respective radial fluid passages at the outer peripheral surface of the input shaft serve as the respective radially opposite lubricating fluid spill ports.

Abstract: A first tube is a medical tube provided with a first portion, a second portion and a third portion in this order from the proximal end side toward the distal end side and is made of a resin. At the second portion, the outer diameter is smaller than the outer diameter of the first portion and the inner diameter is substantially equal to the inner diameter of the first portion. At the third portion, the outer diameter and the inner diameter are respectively smaller than the outer diameter and the inner diameter of the second portion. In this manner, a medical tube in which the outer diameter of the proximal end side is relatively large and the outer diameter of the distal end side is relatively small while securing the inner diameter having a sufficient size at the distal end side can be provided.