Miniature tube fitting having a barbed stem portion surrounded by a protective shroud and method for making same

• US 4,703,957 A
• Filed: 01/13/1986
• Issued: 11/03/1987
• Est. Priority Date: 10/05/1984
• Status: Expired due to Term

• Current Assignee: Colder Products Company (Dover Corporation)
• Original Assignee: Colder Products Company (Dover Corporation)
• Inventors: Blenkush, Brian J.
• Primary Examiner(s): Husar, Cornelius J.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/818,245
• Time in Patent Office: 659 Days
• Field of Search: 285/93, 285/121, 285/122, 285/123, 285/124, 285/125, 285/126, 285/127, 285/239, 285/423, 285/137.1, 264/318, 249/145, 249/184, 425/577
• US Class Current: 285/239
• CPC Class Codes: F16L 37/56 for double-walled or multi-channel pipes or pipe assemblies

Abstract

A molded miniature tube fitting (200) having a barbed stem portion (204) surrounded by a protective shroud (206) and method for making same. The shroud (206) including windows (230) therein so as to enable undercutting of a portion of the stem portion (204) so as to form a barb (224).

Claims

1. A molded tube fitting, comprising:

(a) a body defining a first pathway for the flow of fluid therethrough;

(b) a first end including a stem portion having a tapered stem portion adapted to be inserted into tubing defining a second pathway for the flow of fluid, the stem portion including barb means for gripping the interior of the tubing;

(c) a shroud portion radially spaced apart from the stem portion and encircling at least a portion of the stem portion, the shroud being free from attachment with the stem portion along at least a portion of the stem portion and cooperating with the stem portion to define an annular space for receipt of the tubing, the shroud defining two windows enabling mold elements to be removably inserted therethrough so as to form the barb means along the stem portion; and

(d) a second end for interconnection of the molded tube fitting to a third pathway for the flow of fluid, the first, second, and third pathways being in fluid communication.

2. A tube fitting in accordance with claim 1, wherein the tapered stem portion is free from a longitudinally extending part line.

3. A tube fitting in accordance with claim 1, wherein the windows are diametrically opposed.

4. A molded tube fitting in accordance with claim 1, wherein the second end is formed substantially as a hollow cylinder, the hollow cylinder having an inner surface and an outer surface, the inner surface being in communication the third pathway for the flow of fluid, the outer surface being threaded.

5. The molded tube fitting of claim 4, further comprising a middle portion, the middle portion being integrally formed between the first end and the second end, the middle portion being appropriately shaped so as to facilitate gripping of the middle portion by a rotation facilitating article.

6. The molded tube fitting of claim 5, wherein the middle portion is formed substantially as a hexagonal solid.

7. The molded tube fitting of claim 6, further comprising a plurality of first end portions, the plurality of first end portions permitting the attachment of a plurality of tubes to the molded tube fitting, the plurality of first end portions being joined at the middle portion of the molded tube fitting so as to define a single flow path, the single flow path fluidly merging with the pathway for the flow of the fluid extending through the second end portion of the molded tube fitting.

8. The molded tube fitting of claim 7, wherein the plurality of first end portions are oriented orthogonally to the second end portion, thereby creating a "tee" fitting.

9. The molded tube fitting of claim 1, wherein the stem portion includes a transversely extending shoulder portion, the shoulder portion being formed adjacent to the tapered portion, thereby forming a sharp barb used for gripping the tube.

10. The molded tube fitting of claim 4, wherein the second end is substantially identical to the first end, thereby forming a molded tube fitting having a stem portion at both the first and second ends.

11. A molded tube fitting, comprising:

(a) a body defining a first pathway for the flow of fluid therethrough;

(b) a first end including a stem portion having a tapered stem portion adapted to be inserted into tubing defining a second pathway for the flow of fluid, the tapered stem portion being free from a longitudinally extending part line, the stem portion including barb means for gripping the interior of the tubing;

(c) a shroud portion radially spaced apart from the stem portion and encircling at least a portion of the stem portion, the shroud being free from attachment with the stem portion along at least a portion of the stem portion and cooperating with the stem portion to define an annular space for receipt of the tubing, the shroud defining two windows enabling mold elements to be removably inserted therethrough so as to form the barb means along the stem portion; and

(d) a second end for interconnection of the molded tube fitting to a third pathway for the flow of fluid, the first, second, and third pathways being in fluid communication.

12. A molded tube fitting, comprising:

(a) a body defining a first pathway for the flow of fluid therethrough;

(b) a first end including a stem portion having a tapered stem portion adapted to be inserted into tubing defining a second pathway for the flow of fluid, the tapered stem portion being free from a longitudinally extending part line, the stem portion including a transversely extending shoulder portion, the shoulder portion being formed adjacent the tapered stem portion, thereby forming a sharp barb used for gripping the interior of the tubing;

(c) a shroud portion radially spaced apart from the stem portion and encircling at least a portion of the stem portion, the shroud being free from attachment with the stem portion along at least a portion of the stem portion and cooperating with the stem portion to define an annular space for receipt of the tubing, the shroud defining two windows enabling mold elements to be removably inserted therethrough so as to form the transversely extending shoulder portion; and

(d) a second end for interconnection of the molded tube fitting to a third pathway for the flow of fluid, the first, second, and third pathways being in fluid communication.