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US 7,093,862 B2Granted
Tube joint and apparatus for producing the same
AssigneeSMC Corporation
InventorMasaaki Muto
Life of this patent
Estimating the term…
Abstract
A ring member and ring members made of metal are tightened and installed to the outer circumferential surface of a body made of a resin material. Accordingly, the body is prevented from outward deformation. When a tube joint is used in a high temperature atmosphere, even if any force acts on a fluid tube in the direction to cause detachment from the tube joint due to any external force or the pressure fluid flowing through the inside of the tube joint, then the fluid tube and a connecting member inserted into the body are reliably prevented from disengagement.
Claims11
A tube joint comprising:
- a body made of a resin material having a distal edge and an opening at a second end of said body;
- an attachment/detachment mechanism into which a tube is configured to be inserted and which comprises:
- a fastening section configured to bite an outer circumferential surface of the tube;
- a collet having a taper section provided outside said fastening section;
- and
- an engaging member provided outside said taper section, said engaging member having a projection which outwardly projects from an outer circumferential surface of said engaging member and which engages with an inner circumferential wall surface of said body at said second end:
- and
- a seal member for surrounding an outer circumferential surface of the tube to prevent a pressure fluid from leakage;
- and
- a ring member fitted to an outer circumferential wall surface of said body at said second end, and
- wherein when a force is applied to the inserted tube to pull out the tube from the attachment/detachment mechanism, said attachment/detachment mechanism is constructed such that said fastening section is displaced together with said collet along an inner circumferential surface of said engaging member in a direction opposite to an inserting direction of the tube and that said engaging member engages with said taper section of said collet to press said fastening section radially inwardly toward the outer circumferential surface of the tube, and
- where when the force is applied to the inserted tube to pull out the tube from the attachment/detachment mechanism, said seal member is displaced together with the tube in the direction opposite to the inserting direction of the tube, and said seal member abuts against said fastening section and said collet for preventing the tube being disengaged from said attachment/detachment mechanism.
9 more elements
A tube joint comprising:
- a body made of a resin material having a distal edge and an opening at a second end of said body;
- an attachment/detachment mechanism into which a tube is configured to be inserted and which comprises:
- a fastening section configured to bite an outer circumferential surface of the tube;
- a collet having a taper section provided outside said fastening section;
- an engaging member provided outside said taper section, said engaging member having a projection which outwardly projects from an outer circumferential surface of said engaging member and which engages with an inner circumferential wall surface of said body at said second end:
- and
- a seal member for surrounding an outer circumferential surface of the tube to prevent a pressure fluid from leakage;
- and
- a ring member fitted to an outer circumferential wall surface of said body at said second end and pressing the outer circumferential wall surface of said body radially inwardly,
- wherein when a force is applied to the inserted tube to pull out the tube from the attachment/detachment mechanism, said attachment/detachment mechanism is constructed such that said fastening section is displaced together with said collet along an inner circumferential surface of said engaging member in a direction opposite to an inserting direction of the tube and said engaging member engages with said taper section of said collet to press said fastening section radially inwardly toward the outer circumferential surface of the tube,
- wherein when the force is applied to the inserted tube to pull out the tube from the attachment/detachment mechanism, said seal member is displaced together with the tube in the opposite direction to the inserting direction of the tube, and said seal member abuts against said fastening section and said collet for preventing the tube being disengaged from said attachment/detachment mechanism, and
- wherein said ring member presses the outer circumferential wall surface of said body radially inwardly, and said taper section of said collet engages with an end surface of said engaging member to press said fastening section for preventing said engaging member from being disengaged from said body.
9 more elements
Dependencies are inferred from the claim text.