US 4,907,830 AGranted

Fluid coupling

AssigneeNitto Kohki Co., Ltd.

InventorsTakeya Sasa, Yoshikazu Kobayashi, Reichi Makishima

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Abstract

A fluid coupling for a corrugated pipe, comprising a coupling body having an axial through hole including a pipe insertion portion and a fluid passage portion, metallic seal means arranged on the fluid passage side of the pipe insertion portion, for sealing an end portion of a corrugated pipe pressed against the same, clamp means having at least three segments arranged in the circumferential direction and adapted to tightly hold the peripheral portion of the corrugated pipe inserted in the insertion portion, and retaining means for axially and immovably retaining the clamp means so that the end portion of the corrugated pipe is pressed against the seal means, to be sealed thereby.

Claims8

Dependent claims

A fluid coupling for a corrugated pipe, comprising:

clamp means having at least one end portion and a coupling body having first and second end portions and an axial through hole, said through hole including a pipe insertion portion, disposed close to the first end portion through which the front end portion of a corrugated pipe is inserted, and a fluid passage portion disposed close to the second end portion;
wherein said pipe insertion portion includes a large-diameter portion opening to the one end portion side and housing said at least one end portion of said clamp means, said clamp means includes at least three segments and each of said segments of said clamp means has an inner surface defining the axial through hole, said inner surface having a configuration such as to be able to mate with the external configuration of the corrugated pipe when the clamp means is inserted in the large-diameter portion;
metallic seal means arranged on the fluid passage side the pipe insertion portion, for sealing an end portion of a corrugated pipe pressure against the same;
said at least three segments arranged in the circumferential direction, an axial through hole defined when the segments are arranged in the circumferential direction, and an outside diameter at said at least one end portion such that at least part of the clamp means can be inserted into said large-diameter portion, said clamp means being capable of tightly holding the peripheral portion of the corrugated pipe inserted in the axial through hole;
and
retaining means for axially and immovably retaining the clamp means so that the end portion of the corrugated pipe is pressed against the seal means, to be sealed thereby, and
wherein said coupling body has a cylindrical outer peripheral surface on the side of the first end portion thereof, said clamp means has a groove formed on the outer peripheral surface of each of the segments, said groove becoming circumferentially continuous when the segments are assembled into a cylindrical configuration, and said retaining means includes a sleeve having first and second end portions and which is slidable on the outer peripheral surface of the coupling body, said first end portion having a projection protruding radially inward therefrom and adapted to be fitted in the circumferential groove of the clamp means.

4 more elements

Dependencies are inferred from the claim text.

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Abstract

A fluid coupling for a corrugated pipe, comprising:

clamp means having at least one end portion and a coupling body having first and second end portions and an axial through hole, said through hole including a pipe insertion portion, disposed close to the first end portion through which the front end portion of a corrugated pipe is inserted, and a fluid passage portion disposed close to the second end portion;
wherein said pipe insertion portion includes a large-diameter portion opening to the one end portion side and housing said at least one end portion of said clamp means, said clamp means includes at least three segments and each of said segments of said clamp means has an inner surface defining the axial through hole, said inner surface having a configuration such as to be able to mate with the external configuration of the corrugated pipe when the clamp means is inserted in the large-diameter portion;
metallic seal means arranged on the fluid passage side the pipe insertion portion, for sealing an end portion of a corrugated pipe pressure against the same;
said at least three segments arranged in the circumferential direction, an axial through hole defined when the segments are arranged in the circumferential direction, and an outside diameter at said at least one end portion such that at least part of the clamp means can be inserted into said large-diameter portion, said clamp means being capable of tightly holding the peripheral portion of the corrugated pipe inserted in the axial through hole;
and
retaining means for axially and immovably retaining the clamp means so that the end portion of the corrugated pipe is pressed against the seal means, to be sealed thereby, and
wherein said coupling body has a cylindrical outer peripheral surface on the side of the first end portion thereof, said clamp means has a groove formed on the outer peripheral surface of each of the segments, said groove becoming circumferentially continuous when the segments are assembled into a cylindrical configuration, and said retaining means includes a sleeve having first and second end portions and which is slidable on the outer peripheral surface of the coupling body, said first end portion having a projection protruding radially inward therefrom and adapted to be fitted in the circumferential groove of the clamp means.

4 more elements