US 12,257,808 B2
Tube and pump using same
Kouichi Yanai, Ibaraki (JP); and Yukihiko Hayashi, Ibaraki (JP)
Assigned to JUNKOSHA INC., Ibaraki (JP)
Appl. No. 17/794,114
Filed by JUNKOSHA INC., Ibaraki (JP)
PCT Filed Jan. 21, 2021, PCT No. PCT/JP2021/002116
§ 371(c)(1), (2) Date Jul. 20, 2022,
PCT Pub. No. WO2021/149783, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 2020-007861 (JP), filed on Jan. 21, 2020.
Prior Publication US 2023/0047117 A1, Feb. 16, 2023
Int. Cl. B32B 1/08 (2006.01); B32B 5/18 (2006.01); B32B 5/32 (2006.01); B32B 7/022 (2019.01); F04B 43/00 (2006.01); F04B 43/08 (2006.01); F04B 45/06 (2006.01); F04B 45/08 (2006.01); F16L 11/04 (2006.01)
CPC B32B 1/08 (2013.01) [B32B 5/18 (2013.01); B32B 5/32 (2013.01); B32B 7/022 (2019.01); F04B 43/0072 (2013.01); F04B 43/08 (2013.01); F04B 45/06 (2013.01); F04B 45/08 (2013.01); F16L 11/04 (2013.01); B32B 2260/02 (2013.01); B32B 2260/046 (2013.01); B32B 2266/104 (2016.11); B32B 2307/54 (2013.01); B32B 2307/546 (2013.01); B32B 2597/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A tube for use in a pump that transports a fluid by peristaltic movement, the tube comprising:
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.