# US 2018/0320878 A1 · Systems and methods for a heat sink

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- Number: US 2018/0320878 A1
- Document ID: US20180320878A1
- Status: Published application
- Kind: A1
- Application number: 15/636,923
- Filed: 2017-06-29
- Published: 2018-11-08
- Earliest claimed: 2017-05-03
- Assignees: Fluence Bioengineering, Inc.
- Applicants: Fluence Bioengineering
- Inventors: Dung Duong; Randall Johnson; Nicholas Klase
- Web page: https://patentgrep.com/patent/US20180320878A1

## CPC

- F21V 29/502: characterised by the adaptation for cooling of specific components
- A01G 9/20: Forcing-frames; Lights {, i.e. glass panels covering the forcing-frames}
- A01G 9/249: {Lighting means (with special arrangements for promoting growth A01G7/045)}
- F21V 23/009: {the casing being inside the housing of the lighting device}
- F21V 29/745: {the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend}
- F21V 29/75: with fins or blades having different shapes, thicknesses or spacing
- F21V 29/76: with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
- F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis}
- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F28F 3/02: Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations (F28F3/08 takes precedence)
- H05K 1/021: {Components thermally connected to metal substrates or heat-sinks by insert mounting}
- H05K 7/20409: {Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing}
- H10W 40/22: characterised by their shape, e.g. having conical or cylindrical projections
- F21V 19/0055: {by screwing}
- F21V 29/67: characterised by the arrangement of fans
- F21W 2131/40: Lighting for industrial, commercial, recreational or military use
- F21Y 2103/10: comprising a linear array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- F28D 2021/0029: {Heat sinks}
- F28F 3/025: {the means being corrugated, plate-like elements}
- F28F 3/048: {in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels}
- F28F 2255/16: extruded
- H05K 1/05: Insulated {conductive substrates, e.g. insulated} metal substrate
- H05K 3/0061: {onto a metallic substrate, e.g. a heat sink (heat sinks for electric apparatus H05K7/20)}
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- 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

Embodiments may utilize a series of exposed fins, which increase the surface area of the heat sink creating additional air flow. As hotter air rises within the system, cooler is drawn into the heatsink. The fins may be exposed on both sides of the longitudinal axis, allowing cooler air to be drawn towards the longitudinal axis above the heatsink and flow upward. This process may cool the fins. Additionally, the spacing between the fins may have to be wide enough to allow for air to freely enter the heatsink.

## Claims

### Claim 1

A method for manufacturing a heat sink, comprising:
forming a first plurality of fins by extruding a first unitary block of metal from an upper surface of the first unitary block of metal towards a lower surface of the first unitary block of metal, wherein each of the plurality of fins includes an exposed upper edge;
coupling rails to a first base positioned below the first plurality of fins, the rails extending from a first end of the first base to a second end of the first base, wherein the first base is simultaneously formed with the fins.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
extruding a second unitary block of metal to form a second plurality of fins and a second base;
coupling the first base and the second base via the rails.

### Claim 3 (depends on 2)

The method of claim 2, further comprising:
creating at least three exposed surfaces between a first fin of the first plurality of fins and a second fin of the first plurality of fins.

### Claim 4 (depends on 1)

The method of claim 1, wherein the rails are formed of a different material than the first unitary block of metal.

### Claim 5 (depends on 4)

The method of claim 4, wherein the rails are formed of aluminum and the first unitary block of metal is an aluminum block.

### Claim 6 (depends on 1)

The method of claim 1, further comprising:
extruding an entire height of the first unitary block of metal to create four exposed edges between adjacent fins of the first plurality of fins.

### Claim 7 (depends on 1)

The method of claim 1, wherein the extrusions are evenly spaced and uniformly shaped, the extrusions being perpendicular to the central axis.

### Claim 8 (depends on 7)

The method of claim 7, wherein the extrusions are spaced ⅓ of an inch from each other.

### Claim 9 (depends on 1)

The method of claim 1, further comprising:
coupling first ends of the rails to an outer sidewall of the first base; and
positioning second ends of the rails below the first base.

### Claim 10 (depends on 9)

The method of claim 9 wherein the rails include an angled sidewall and a planar sidewall.

### Claim 11

A heat sink comprising:
a first plurality of fins formed by extruding a first unitary block of metal from an upper surface of the first unitary block of metal towards a lower surface of the first unitary block of metal, the extrusions causing spacing between each of the first plurality of fins, wherein each of the plurality of fins includes an exposed upper edge;
rails coupled to a first base positioned below the first plurality of fins, wherein the first base is simultaneously formed with the first plurality of.

### Claim 12 (depends on 11)

The heat sink of claim 11, further comprising:
a second plurality of fins formed by extruding a second unitary block of metal to form a second plurality of fins;
a second base associated with the second plurality of fins, wherein the rails are configured to couple the first base and a second base.

### Claim 13 (depends on 12)

The heat sink of claim 12, wherein the extrusions create at least three exposed surfaces between a first fin of the first plurality of fins and a second fin of the first plurality of fins.

### Claim 14 (depends on 11)

The heat sink of claim 11, wherein the rails are formed of a different material than the first unitary block of metal.

### Claim 15 (depends on 14)

The heat sink of claim 14, wherein the rails are formed of aluminum and the first unitary block of metal is an aluminum block.

### Claim 16 (depends on 11)

The heat sink of claim 11, wherein the extrusions extending across an entire height of the first unitary block of metal to create four exposed edges between adjacent fins of the first plurality of fins.

### Claim 17 (depends on 11)

The heat sink of claim 11, wherein the extrusions are evenly spaced and uniformly shaped, the extrusions being perpendicular to the central axis.

### Claim 18 (depends on 17)

The heat sink of claim 17, wherein the extrusions are spaced ⅓ of an inch from each other.

### Claim 19 (depends on 11)

The heat sink of claim 11, wherein first ends of the rails are coupled to an outer sidewall of the first base, and second ends of the rails are positioned below the first base.

### Claim 20 (depends on 19)

The heat sink of claim 19, wherein the rails include an angled sidewall and a planar sidewall.