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Patent Searching and Data


Title:
ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2020/080545
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing an actuator having further increased durability in comparison to conventional actuators. This actuator is characterized by being provided with an actuator body (100) comprising a cylindrical tube (110) which expands and contracts by means of fluid pressure, and also comprising a sleeve (120) which is a cylindrical structure formed by weaving cords oriented in a predetermined direction and which covers the outer peripheral surface of the tube (110), wherein the inner diameter r0 (mm) of the tube (110), the thickness t (mm) of the tube (110), the storage elastic modulus E'(MPa) of the tube (110) at 25ºC, and the mesh aperture ratio A of the cords constituting the sleeve (120) in a pressurized state satisfy the following formula (1): 50 ≤ E' × (t/r0)/A ≤ 600 ... (1).

Inventors:
KANESUGI HIROYUKI (JP)
Application Number:
PCT/JP2019/041214
Publication Date:
April 23, 2020
Filing Date:
October 18, 2019
Export Citation:
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Assignee:
BRIDGESTONE CORP (JP)
International Classes:
D03D1/00; F15B15/10; D03D3/02
Domestic Patent References:
WO2018084122A12018-05-11
WO2018084123A12018-05-11
Foreign References:
JPS5240378B21977-10-12
JPS60139905A1985-07-24
JPS61236905A1986-10-22
Other References:
See also references of EP 3869046A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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