Flexible tube
AssigneeCalsonic Kansei Corporation
InventorTadashi Nagai
Life of this patent
Estimating the term…
Abstract
A small-diameter part in the vicinity of a center of a bellows portion in an axial direction has a smaller diameter. A tip end of the small-diameter part contacts at a point A with an outer peripheral face of an interlock pipe. The interlock pipe vibrates with using the point A and points B in both ends as fulcrums. The addition of the point A reduces distance between the fulcrums. In accordance with this reduction, deflection amount of the interlock pipe is reduced and vibration amplitude of the interlock pipe is decreased. Therefore, the interlock pipe does not contact with the bellows portion so that troubles such as noises can be prevented from occurring.
Claims11
A flexible tube comprising:
- a bellows tube having a bellow portion and straight portions, which is formed both ends thereof;
- an interlock pipe in which a plurality of annular plate members or spirally wound band plates are flexibly coupled at side edges thereof to one another through an interlock mechanism, the interlock pipe disposed inside the bellows tube to have a common axis;
- a restriction member disposed on the bellow portion, for serving as a fulcrum to restrict vibration amplitude of the interlock pipe when the interlock pipe is vibrated,
- wherein inner diameter of the straight portions tube is larger than that of first small-diameter parts of the bellow portion;
- and
- wherein inner peripheral surfaces of the straight portions are fixed to an outer surface of the interlock pipe.
A flexible tube comprising:
- a bellows tube having a bellow portion and straight portions, which is formed both ends thereof;
- an interlock pipe in which a plurality of annular plate members or spirally wound band plates are flexibly coupled at side edges thereof to one another through an interlock mechanism, the interlock pipe disposed inside the bellows tube to have a common axis;
- restriction means disposed on the bellow portion, for serving as a fulcrum to restrict vibration amplitude of the interlock pipe when the interlock pipe is vibrated,
- wherein inner diameter of the straight portions tube is larger than that of first small-diameter parts of the bellow portion;
- and
- wherein inner peripheral surfaces of the straight portions are fixed to an outer surface of the interlock pipe.
Dependencies are inferred from the claim text.