Fluid direction tube insertion assembly and insertion method

• US 5,071,172 A
• Filed: 01/09/1990
• Issued: 12/10/1991
• Est. Priority Date: 01/09/1990
• Status: Expired due to Term

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Motor Company
• Inventors: Gross, Todd A.
• Primary Examiner(s): Nicholson, Eric K.
• Application Number:
  US07/462,521
• Time in Patent Office: 700 Days
• Field of Search: 285/137.1, 285/131, 285/138, 285/26, 285/423, 29/432.2
• US Class Current: 285/124.4
• CPC Class Codes: F16L 39/00 Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
• CPC Class Codes: Y10T 29/4981 Utilizing transitory attached element or associated separate material
• CPC Class Codes: Y10T 29/49837 of first part

Abstract

A fluid direction tube insertion assembly for simultaneously inserting two or more fluid direction tubes into an automobile engine body or part thereof. The fluid direction tube insertion assembly includes at least two thermoplastic fluid direction tubes which preferably have a coefficient of thermal expansion about the same as the automobile engine body or part thereof into which they are to be inserted and a flexible bracket which is sufficiently flexible that it may be flexed during insertion of the fluid direction tubes into corresponding receiving bores in the engine body to provide proper alignment/orientation of the fluid direction tubes with the corresponding receiving bore. The fluid direction tube insertion assembly may be either a one-piece molded one or may be of separately molded fluid direction tubes and a separately molded flexible bracket which are subsequently joined.

Claims

1. A fluid direction tube insertion assembly for simultaneously inserting two or more fluid direction tubes into bores in an automobile engine part comprising:

(a) at least two thermoplastic fluid direction tubes; and

(b) a flexible bracket joining said thermoplastic fluid direction tubes in a spaced relationship, said flexible bracket having a centrally located curved neck and openings to concentrically surround each of said thermoplastic fluid direction tubes, whereby said flexible bracket allows said spaced relationship to vary for simultaneously inserting said thermoplastic fluid direction tubes into said bores.

2. The fluid direction tube insertion assembly of claim 1 wherein said thermoplastic material has a coefficient of thermal expansion of about 2.5 m/m/°

C. for a temperature range from about -40°

C. to about 140°

C.

3. The fluid direction tube insertion assembly of claim 1 wherein said thermoplastic fluid direction tubes are made of mineral/glass reinforced thermoplastic material.

4. The fluid direction tube insertion assembly of claim 3 wherein said mineral/glass reinforced thermoplastic material is selected from the group consisting of glass reinforced thermoplastic polyester resins and glass reinforced polyetherimide resins.

5. The fluid direction tube insertion assembly of claim 3 wherein said flexible bracket is made of an engineering elastomer having a flexural modulus sufficient to permit insertion of said thermoplastic fluid direction tubes into said bores and flame retardant characteristics so as to withstand high temperature automobile fluids.

6. The fluid direction tube insertion assembly of claim 1 wherein said fluid direction tubes and said flexible bracket are made from the same thermoplastic material.

7. A fluid direction tube insertion assembly for simultaneously inserting two or more fluid direction tubes into bores in an automobile engine comprising:

(a) at least two thermoplastic fluid direction tubes comprising an inboard fluid direction tube, an outboard fluid direction tube and a center fluid direction tube; and

(b) a flexible bracket joining together said thermoplastic fluid direction tubes in a spaced relationship, said flexible bracket having a centrally located curved neck and openings to concentrically surround each of said thermoplastic fluid direction tubes, wherein said flexible bracket allows said spaced relationship to vary for simultaneously inserting said thermoplastic fluid direction tubes into said bores.

8. The fluid direction tube insertion assembly of claim 7 herein said inboard fluid direction tube and said outboard fluid direction tube have equal diameters and said diameters are larger than the diameter of said center fluid direction tube.

9. A fluid direction tube insertion assembly for simultaneously inserting two or more fluid direction tubes into bores in an automobile engine comprising:

(a) at least two thermoplastic fluid direction tubes which are made from a mineral/glass reinforced thermoplastic material selected from the group consisting of glass reinforced thermoplastic polyester resins and glass reinforced polyetherimide resins; and

thermoplastic material has a coefficient of thermal expansion about the same as an automobile part; and

(b) a flexible bracket molded as one-piece with said thermoplastic fluid direction tubes in a spaced relationship;

said flexible bracket having a centrally located neck and openings to concentrically surround each of said tubes and a thickness of about 0.5 to 0.75 mm;

said flexible bracket is made from an engineering elastomer having a flexural modulus sufficient to permit insertion of said thermoplastic direction tubes into said bores and flame retardant characteristics so as to withstand high temperature automobile fluids.

10. The fluid direction tube insertion assembly of claim 9 wherein said flexible bracket is molded in a concave shape.

11. A method of making a fluid direction tube insertion assembly for simultaneously inserting two or more fluid direction tubes into bores in an automobile engine part thereof comprising the steps of:

(a) forming at least two thermoplastic fluid direction tubes;

(b) forming a flexible bracket having a centrally located neck and openings to concentrically surround each of said thermoplastic fluid direction tubes; and

(c) molding said flexible bracket and said thermoplastic fluid direction tubes as one-piece to form said fluid direction tube insertion assembly.

12. A method of making a fluid direction tube insertion assembly for simultaneously inserting two or more fluid direction tubes into bores in an automobile engine part thereof comprising the steps of:

(a) forming at least two thermoplastic fluid direction tubes;

(b) forming a flexible bracket having a centrally located curved neck and openings to concentrically surround each of said thermoplastic fluid direction tubes;

(c) joining said flexible bracket and said thermoplastic fluid direction tubes together in a spaced relationship to form said fluid direction tube insertion assembly, whereby said flexible bracket allows said spaced relationship to vary for simultaneously inserting said thermoplastic fluid direction tubes into said bores.

13. The method of claim 12 including the steps of forming said thermoplastic fluid direction tubes from a mineral/glass reinforced thermoplastic material having a coefficient of expansion about the same as an automobile part and forming said flexible bracket from an engineering elastomer having a flexural modulus sufficient to permit insertion of said thermoplastic direction tubes into said bores and flame retardant characteristics so as to withstand high temperature automobile fluids.

14. The method of claim 12 including the step of forming said thermoplastic direction tubes and said flexible bracket from the same thermoplastic material.

15. A method for simultaneously inserting fluid direction tubes into bores in an automobile part thereof comprising the steps of:

(a) providing a fluid direction tube insertion assembly having at least two thermoplastic fluid direction tubes and a flexible bracket joining said thermoplastic fluid direction tubes in a spaced relationship;

(b) providing an automobile engine part having at least two spaced apart bores therein into which said fluid direction tubes are to be inserted;

(c) flexing said bracket just prior to inserting said fluid direction tubes into said bores so that each of said fluid direction tubes is aligned with a corresponding said bore; and

(d) inserting said fluid direction tubes into said corresponding bore.

16. The method of claim 15 including the steps of providing a chamfer at the entrance to each of said bores and providing a corresponding chamfer in each of said fluid direction tubes.

17. The method of claim 15 including the steps of forming said fluid direction tubes from a thermoplastic material having a coefficient of thermal expansion about the same as an automobile part.

18. The method of claim 15 including the steps of providing a concave flexible bracket.

19. The method of claim 15 including the step of providing said fluid direction tube and said flexible bracket each formed from the same thermoplastic material.

20. A fluid direction tube insertion assembly for simultaneously inserting two or more fluid direction tubes into bores in an automobile engine comprising:

(a) at least two thermoplastic fluid direction tubes which are made from a mineral/glass reinforced thermoplastic material selected from the group consisting of glass reinforced thermoplastic polyester resins and glass reinforced polyetherimide resins;

said thermoplastic material has a coefficient of thermal expansion about the same as an automobile part; and

(b) a flexible bracket having a curved shape and being molded as one-piece with said thermoplastic fluid direction tubes in a spaced relationship;

said flexible bracket having a centrally located neck and openings to concentrically surround each of said tubes and a thickness of about 0.5 to 0.75 mm;

said flexible bracket is made from an engineering elastomer having a flexural modulus sufficient to permit insertion of said thermoplastic direction tubes into said bores and flame retardant characteristics so as to withstand high temperature automobile fluids.