# US 6,131,615 A · Tube assembly for auxiliary heating and air conditioning system

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- Number: US 6,131,615 A
- Document ID: US6131615A
- Status: Granted
- Kind: A
- Application number: 09/442,586
- Filed: 1999-11-18
- Granted: 2000-10-17
- Earliest claimed: 1997-10-30
- Assignees: Bundy Corporation; Chrysler Corporation
- Inventors: Philip S. Hartnagel; Kurian Pothen; Matthew Mourad; Charles D. Thrift
- Web page: https://patentgrep.com/patent/US6131615A

## CPC

- B60H 1/00342: {of the liquid-liquid type}
- B60H 1/00557: {Details of ducts or cables}
- B60H 1/00571: {of liquid ducts, e.g. for coolant liquids or refrigerants}
- F28D 7/106: {consisting of two coaxial conduits or modules of two coaxial conduits}
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)

## Abstract

A tube assembly for an auxiliary heating and air conditioning system includes an inner tube extending longitudinally, an outer tube extending longitudinally and disposed over the inner tube, the outer tube including a plurality of ribs for locating the inner tube approximately concentric to the outer tube, at least one connector tube, and at least one connector interconnecting the at least one connector tube and the outer tube to allow fluid flow between the inner tube and the outer tube.

## Claims

### Claim 1

A tube assembly for a heating and air conditioning system comprising:
an inner tube extending longitudinally;
an outer tube extending longitudinally and disposed over said inner tube;
a connector tube;
a connector interconnecting said connector tube and said outer tube to allow fluid flow between said inner tube and said outer tube, said inner tube extending through said connector, wherein said inner tube includes a bead located longitudinally outwardly of said connector for preventing said connector from exiting said inner tube;
said outer tube including a plurality of ribs for locating said inner tube approximately concentric to said outer tube; and
said ribs extending longitudinally and radially inwardly and are spaced approximately ninety degrees apart.

### Claim 2 (depends on 1)

A tube assembly as set forth in claim 1 wherein said connector includes a cavity in one longitudinal end and a first passageway extending through another longitudinal end and communicating with said cavity.

### Claim 3 (depends on 2)

A tube assembly as set forth in claim 2 wherein said connector includes a second passageway extending into and communicating with said cavity, said connector tube being disposed in said second passageway.

### Claim 4 (depends on 2)

A tube assembly as set forth in claim 2 wherein said cavity includes a radially enlarged opening to receive said outer tube.

### Claim 5 (depends on 4)

A tube assembly as set forth in claim 4 wherein said connector includes a shoulder between one end of said cavity and said enlarged opening to locate said outer tube within said connector.

### Claim 6

A tube assembly for a heating and air conditioning system comprising:
an inner tube extending longitudinally;
an outer tube extending longitudinally and disposed over said inner tube;
a connector tube;
a connector interconnecting said connector tube and said outer tube to allow fluid flow between said inner tube and said outer tube, said inner tube extending through said connector, wherein said inner tube includes a bead located longitudinally outwardly of said connector for preventing said connector from exiting said inner tube;
said outer tube including a plurality of ribs for locating said inner tube approximately concentric to said outer tube; and
said ribs extending longitudinally and radially inwardly and are spaced approximately seventy two degrees apart.

### Claim 7 (depends on 6)

A tube assembly as set forth in claim 6 wherein said connector includes a cavity in one longitudinal end and a first passageway extending through another longitudinal end and communicating with said cavity.

### Claim 8 (depends on 7)

A tube assembly as set forth in claim 7 wherein said connector includes a second passageway extending into and communicating with said cavity, said connector tube being disposed in said second passageway.

### Claim 9 (depends on 7)

A tube assembly as set forth in claim 7 wherein said cavity includes a radially enlarged opening to receive said outer tube.

### Claim 10 (depends on 9)

A tube assembly as set forth in claim 9 wherein said connector includes a shoulder between one end of said cavity and said enlarged opening to locate said outer tube within said connector.