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US 12,723,693 B1Granted
Double containment fittings with fusion coils
AssigneeK.D.W. Company Limited
InventorsKwok Din Wong, Sai Hin Wong, Hang Yan Wong
Life of this patent
Estimating the term…
Abstract
A double containment fitting for engagement with double containment pipes and comprising an outer cylinder, an inner cylinder and a plurality of ribs spacing the outer cylinder from the inner cylinder. The double containment fitting further includes heatable elements configured to have energy supplied thereto to heat the heatable elements to fuse the double containment fitting to the double containment pipes.
Claims16
A double containment fitting for engagement with a plurality of double containment pipes each having an inner tube surrounded by an outer tube and a plurality of spacers spacing the inner tube from the outer tube, the double containment fitting comprising:
- an outer cylinder having two outer receiving openings;
- an inner cylinder having two inner receiving openings;
- and
- a plurality of ribs integral with and spacing the outer cylinder from the inner cylinder, thereby forming an inner fitting flow area within the inner cylinder and forming an outer fitting flow area between the outer cylinder and the inner cylinder and between adjacent ribs;
- wherein each inner tube of the plurality of double containment pipes being configured to be connected to the double containment fitting by being located within one of the inner receiving openings of the inner cylinder of the double containment fitting;
- wherein each outer tube of the plurality of double containment pipes configured to be connected to the double containment fitting by being located within one of the outer receiving openings;
- the double containment fitting further including a first heatable element configured to be located between the outer cylinder of the double containment fitting and the outer tubes of the double containment pipes, the first heatable element having at least one first end exposed to an exterior of the double containment fitting, the at least one first end configured to have energy supplied thereto to heat the first heatable element to fuse the outer cylinder of the double containment fitting to the outer tubes of the double containment pipes;
- and
- the double containment fitting further including a second heatable element configured to be located between the inner cylinder of the double containment fitting and the inner tubes of the double containment pipes, the second heatable element having at least one second end exposed to the exterior of the double containment fitting, the at least one second end configured to have energy supplied thereto to heat the second heatable element to fuse the inner cylinder of the double containment fitting to the inner tubes of the double containment pipes;
- wherein the first heatable element and the second heatable element are electrically separated;
- wherein the first heatable element includes a pair of first exposed leads that extend through the outer cylinder and that are exposed to an exterior of the outer cylinder;
- wherein the second heatable element includes a pair of second exposed leads that extend through the outer cylinder and that are exposed to an exterior of the outer cylinder;
- and
- wherein a first distance between the pair of first exposed leads is smaller than a distance between the pair of second exposed leads.
11 more elements
A double containment fitting assembly comprising:
- a plurality of double containment pipes, each of the plurality of double containment pipes having an inner tube surrounded by an outer tube and a plurality of spacers spacing the inner tube from the outer tube, each of the plurality of double containment pipes having an inner flow path within the inner tube and an outer flow path located between the inner tube and the outer tube;
- and
- a double containment fitting, the double containment fitting being connected to the plurality of double containment pipes;
- the double containment fitting comprising:
- an outer cylinder having two outer receiving openings;
- an inner cylinder having two inner receiving openings;
- and
- a plurality of ribs integral with and spacing the outer cylinder from the inner cylinder, thereby forming an inner fitting flow area within the inner cylinder and forming an outer fitting flow area between the outer cylinder and the inner cylinder and between adjacent ribs;
- wherein each inner tube of the plurality of double containment pipes is connected to the double containment fitting being located within one of the inner receiving openings of the inner cylinder of the double containment fitting;
- wherein each outer tube of the plurality of double containment pipes is connected to the double containment fitting being located within one of the outer receiving openings;
- wherein a first fluid flow path is located in the inner flow path and the inner fitting flow area of the double containment fitting assembly such that fluid is configured to flow through the first fluid flow path without leaking from the first fluid flow path;
- and
- wherein a second fluid flow path is located in the outer flow path and the outer fitting flow area of the double containment tubing assembly such that fluid is configured to flow through the second fluid flow path if a leakage occurs from the first fluid flow path;
- the double containment fitting further including a first heatable element configured to be located between the outer cylinder of the double containment fitting and the outer tubes of the double containment pipes, the first heatable element having at least one first end exposed to an exterior of the double containment fitting, the at least one first end configured to have energy supplied thereto to heat the first heatable element to fuse the outer cylinder of the double containment fitting to the outer tubes of the double containment pipes;
- and
- the double containment fitting further including a second heatable element configured to be located between the inner cylinder of the double containment fitting and the inner tubes of the double containment pipes, the second heatable element having at least one second end exposed to the exterior of the double containment fitting, the at least one second end configured to have energy supplied thereto to heat the second heatable element to fuse the inner cylinder of the double containment fitting to the inner tubes of the double containment pipes;
- wherein the first heatable element and the second heatable element are electrically separated;
- wherein the first heatable element includes a pair of first exposed leads that extend through the outer cylinder and that are exposed to an exterior of the outer cylinder;
- wherein the second heatable element includes a pair of second exposed leads that extend through the outer cylinder and that are exposed to an exterior of the outer cylinder;
- and
- wherein a first distance between the pair of first exposed leads is smaller than a distance between the pair of second exposed leads.
18 more elements
Dependencies are inferred from the claim text.