Quick-release hinge joint for heat pipe

• US 6,141,216 A
• Filed: 03/31/1999
• Issued: 10/31/2000
• Est. Priority Date: 03/31/1999
• Status: Expired due to Fees

• Current Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Original Assignee: International Business Machines Corporation
• Inventors: Kamath, Vinod, Wong, Tin-Lup, Holung, Joseph Anthony
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): Vortman, Anatoly
• Application Number:
  US09/282,889
• Time in Patent Office: 580 Days
• Field of Search: 361/687, 361/694-703, 361/701, 361/717-719, 361/700, 437/209, 437/221, 437/222, 438/106, 438/118, 438/584, 438/675, 364/708.1, 29/832, 29/841, 29/854, 29/729, 29/739, 62/259.2, 165/80.3, 165/104.33, 165/80.4, 165/185, 165/104.21-104.26, 165/104.29, 165/86
• US Class Current: 361/679.52
• CPC Class Codes: F28D 15/0266 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers F28D15/043 takes precedence
• CPC Class Codes: G06F 1/203 for portable computers, e.g. for laptops
• CPC Class Codes: G06F 2200/203 Heat conductive hinge

Abstract

A notebook computer has a base and a cover that is pivotally mounted to the base with a hinge. An integrated circuit chip is mounted to the base and has one end of a heat pipe attached to it or to an associated heat dissipation device. The other end of the heat pipe lies along the hinge. A spreader plate is mounted in the cover and attached to the other end of the heat pipe to form a nested, rotational joint. One end of the plate is located along the hinge and formed into a slotted cylinder. The heat pipe is pressed into the slot to form the joint which is tight around the heat pipe, but still allows it to rotate to accommodate the pivot motion of the cover. A retainer may be incorporated into the design to further enhance the strength of the joint and assure thermal continuity. The retainer is a hollow cylinder with an axial slit through which the plate extends.

Claims

1. An apparatus, comprising:

a component which generates heat;

a heat dissipation device located remotely relative to the component and having a cylindrical formation on one end;

a cylindrical heat pipe having a first end connected to the component and a second end in engagement with the formation, the formation closely receiving the second end and allowing axial movement and rotation relative thereto;

wherein

the heat pipe conducts heat away from the component, through the heat pipe and the formation, and into the heat dissipation device such that the heat of the component is dissipated remotely relative to the component; and

wherein

the formation of the heat dissipation device has a curved lip along a distal edge.

2. The apparatus of claim 1 wherein the second end of the heat pipe is radially pressed into the formation to form a joint.

3. The apparatus of claim 1 wherein the heat dissipation device is formed from a material selected from the group consisting of copper, aluminum and carbon composite.

4. An apparatus, comprising:

a component which generates heat;

a heat dissipation device located remotely relative to the component and having a cylindrical formation on one end;

a cylindrical heat pipe having a first end connected to the component and a second end in engagement with the formation, the formation closely receiving the second end and allowing axial movement and rotation relative thereto;

a retainer for capturing the formation of the heat dissipation device, the retainer having an axial slit through which the heat dissipation device extends; and

wherein

the heat pipe conducts heat away from the component, through the heat pipe and the formation, and into the heat dissipation device such that the heat of the component is dissipated remotely relative to the component.

5. The apparatus of claim 4 wherein the formation comprises a coil.

6. The apparatus of claim 4 wherein the retainer comprises a tube which is coaxial with the formation.

7. The apparatus of claim 4 wherein the second end of the heat pipe is axially pressed into the formation to form a joint.

8. The apparatus of claim 4 wherein the formation has a maximum diametrical clearance of 25 micrometers where it receives the second end of the heat pipe.

9. A notebook computer, comprising:

a base;

a cover pivotally mounted to the base along a hinge;

an electrical component mounted to the base;

a cylindrical heat pipe having a first end connected to the component and a second end adjacent to the hinge, such that a portion of the heat pipe is substantially coaxial with the hinge;

a spreader plate mounted to the cover and having a cylindrical formation on one end that is substantially coaxial with the hinge, the formation closely receiving the portion of the heat pipe and allowing rotation relative thereto to form a joint; and

wherein

the formation of the spreader plate has a curved lip on one end which curves away from the spreader plate to define an axial slot therebetween for radially receiving the portion of the heat pipe.

10. The computer of claim 9 wherein the spreader plate is formed from a material selected from the group consisting of copper, aluminum and carbon composite.

11. A notebook computer, comprising:

a base;

a cover pivotally mounted to the base along a hinge;

an electrical component mounted to the base;

a cylindrical heat pipe having a first end connected to the component and a second end adjacent to the hinge, such that a portion of the heat pipe is substantially coaxial with the hinge;

a spreader plate mounted to the cover and having a cylindrical formation on one end that is substantially coaxial with the hinge, the formation closely receiving the portion of the heat pipe and allowing rotation relative thereto to form a joint; and

a tubular retainer for capturing the formation of the spreader plate, the retainer having an axial slit through which the spreader plate extends.

12. The computer of claim 11 wherein the formation comprises a coil.

13. The computer of claim 11 wherein the second end of the heat pipe is axially pressed into the formation to form a joint.