[Object] To provide a tube having excellent long-term reliability.

[Means for Solution]

A tube for use in a pump that transports a fluid by peristaltic movement, the tube including: a flow path that serves as a transport path of the fluid and extends in a first direction; and a body portion formed around the flow path, wherein the body portion includes a first layer formed on the flow path and a second layer formed on the first layer, a flexural modulus of elasticity in a radial direction of the second layer is smaller than a flexural modulus of elasticity in a radial direction of the first layer, and when an elastic modulus ratio R1 of the first layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the first layer to the flexural modulus of elasticity in the radial direction of the first layer, and an elastic modulus ratio R2 of the second layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the second layer to the flexural modulus of elasticity in the radial direction of the second layer, the elastic modulus ratio R2 of the second layer is larger than the elastic modulus ratio R1 of the first layer.

[Object] To provide a tube having excellent long-term reliability.

[Means for Solution]

A tube for use in a pump that transports a fluid by peristaltic movement, the tube including: a flow path that serves as a transport path of the fluid and extends in a first direction; and a body portion formed around the flow path, wherein the body portion includes a first layer formed on the flow path and a second layer formed on the first layer, a flexural modulus of elasticity in a radial direction of the second layer is smaller than a flexural modulus of elasticity in a radial direction of the first layer, and when an elastic modulus ratio R1 of the first layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the first layer to the flexural modulus of elasticity in the radial direction of the first layer, and an elastic modulus ratio R2 of the second layer is defined as a ratio of a tensile modulus of elasticity in a circumferential direction of the second layer to the flexural modulus of elasticity in the radial direction of the second layer, the elastic modulus ratio R2 of the second layer is larger than the elastic modulus ratio R1 of the first layer.

A rotor includes a rotary body configured to rotate about a rotational shaft; a plurality of bottom parts attached to the rotary body; a plurality of arm parts that have respective rollers configured to revolve around the rotational shaft and depress a tube, and are attached to the respective bottom parts; and an adjuster that adjusts the mutual positional relation between the bottom parts in the radial direction of the rotation of the rotary body.

Pump assemblies and systems are provided. For example, a pump assembly comprises a pump head, a bezel surrounding an outer perimeter of the pump head, a motor, and tubing. The bezel comprises a bezel upper side, a bezel lower side opposite the bezel upper side, a bezel inlet side extending from the bezel upper side to the bezel lower side, and a bezel outlet side opposite the bezel inlet side and extending from the bezel upper side to the bezel lower side. The bezel defines an inlet channel on the bezel inlet side and an outlet channel on the bezel outlet side, each of the inlet channel and the outlet channel guiding the tubing into the pump head. An exemplary pump system comprises a plurality of pump assemblies that each supply a fluid to a cooling circuit and a base for supporting the plurality of pump assemblies.

Pump assemblies and systems are provided. For example, a pump assembly comprises a pump head, a bezel surrounding an outer perimeter of the pump head, a motor, and tubing. The bezel comprises a bezel upper side, a bezel lower side opposite the bezel upper side, a bezel inlet side extending from the bezel upper side to the bezel lower side, and a bezel outlet side opposite the bezel inlet side and extending from the bezel upper side to the bezel lower side. The bezel defines an inlet channel on the bezel inlet side and an outlet channel on the bezel outlet side, each of the inlet channel and the outlet channel guiding the tubing into the pump head. An exemplary pump system comprises a plurality of pump assemblies that each supply a fluid to a cooling circuit and a base for supporting the plurality of pump assemblies.

A machine for making liquid or semi-liquid food products, specifically ice cream, includes a vessel for processing liquid or semi-liquid base products by means of a stirring device driven by a motor. The mixture in the vessel is transferred through a duct, along which movement means for moving the mixture are operatively located, these movement means comprising a rotary device including two juxtaposed discs, on which a series of rollers is mounted in such a way as to press a flexible portion of the duct, and an opposing element confronting the rollers.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

Hydro excavation vacuum apparatus that process spoil material onboard the apparatus by separating water from the cut earthen material are disclosed.

A pump is provided that includes a tube 1, tube rotors 21A, 21B, and 21C in contact with the tube 1, a case 3 containing the tube 1 and tube rotors 21A, 21B, and 21C, and a drive apparatus 10 that rotates the tube rotors 21A, 21B, and 21C from outside the case 3 without contacting the tube rotors 21A, 21B, and 21C.

A pump is provided that includes a tube 1, tube rotors 21A, 21B, and 21C in contact with the tube 1, a case 3 containing the tube 1 and tube rotors 21A, 21B, and 21C, and a drive apparatus 10 that rotates the tube rotors 21A, 21B, and 21C from outside the case 3 without contacting the tube rotors 21A, 21B, and 21C.