Abstract: A rotary joint having a rotating part provided with a rotating channel in an axial direction, attached to a shaft, and advancing and retracting in the axial direction and, arranged coaxially, a stationary part provided with a stationary channel in the axial direction, wherein an engagement part which allows relative rotation of a rotating seal part provided at the rotating part and a stationary seal part provided at the stationary part while stopping movement in the axial direction and holds a state in which the two sealing surfaces of said rotating seal part and stationary seal part are made to abut facing each other and wherein a rotation stopping mechanism restricting relative rotation of the stationary shaft part with respect to the fitting hole about the axis are provided.

Abstract: A rotary joint having a rotating part provided with a rotating channel in an axial direction, attached to a shaft, and advancing and retracting in the axial direction and, arranged coaxially, a stationary part provided with a stationary channel in the axial direction, wherein an engagement part which allows relative rotation of a rotating seal part provided at the rotating part and a stationary seal part provided at the stationary part while stopping movement in the axial direction and holds a state in which the two sealing surfaces of said rotating seal part and stationary seal part are made to abut facing each other and wherein a rotation stopping mechanism restricting relative rotation of the stationary shaft part with respect to the fitting hole about the axis are provided.

Abstract: This mixed liquid separation apparatus separates and extracts an oil and fat component, which has a lower specific gravity and higher viscosity than a coolant, from a mixed liquid in which the oil and fat component forms a surface layer as a result of floating to the surface of the coolant. The mixed liquid separation apparatus has a liquid separation and transfer part that is composed of a helical body, a shaft and rotary drive part. The liquid separation and transfer part is disposed in a vertical orientation such that the bottom of liquid separation and transfer part is inserted in a storage tank, which stores the mixed liquid, and separates the oil and fat component from the coolant and transfers said oil and fat component upward.

Abstract: The present invention relates to a mixed liquid separating apparatus for separating a particular substance from a mixed liquid containing at least two kinds of substances C and O of which follow-rotating property is different. It comprises a cylindrical outer member 1, a rod-shaped inner member 2 and a driving means 3. The outer member 1 has an inducing port 11 for inducing the mixed liquid at one end thereof, and an expelling port 16 for expelling the separated particular substance O at other end thereof. The inner member 2 is disposed coaxially with said outer member 1 to be relatively rotatable thereto. The driving means 3 relatively rotates said outer member 1 and said inner member 2. Here, at least one of an inner peripheral surface of said outer member 1 and an outer peripheral surface of said inner member 2 has a spiral guiding wall for guiding the particular substance O from the one end to the other end, by the relative rotation between said outer member and said inner member.

Abstract: A size checking apparatus is employed to check sizes or dimensions of a work.