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US 10,865,975 B2Granted
Heat sink lighting device and method for manufacturing a heat sink
AssigneeSignify Holding B.V.
InventorsGwendolin Anita Luiten, Frank De Leeuw
Life of this patent
Estimating the term…
Abstract
A finned heat sink (1) comprising a stack of N finned heat sink plates (3). The N finned heat sink plates comprise a top plate (3a) on top of a bottom plate (3b) and optionally at least one sandwiched plate (3c). The bottom plate (3b), the top plate (3a) and the sandwiched plate (3c) comprise a heat dissipating fin (9) and an opening (7). The fins (9) are bent out of plane of the plates (3). The fin (9) of the bottom plate (3b) and the sandwiched plate (3c) extend through the opening (7a) in the top plate (3a) in the same direction as the fin (9a) of the top plate (3a).
Claims13
A finned heat sink comprising:
- a plurality of N heat sink plates including at least a bottom plate and a top plate, each of the heat sink plates including at least two heat dissipating fins, wherein a first edge of each heat dissipating fin is bent out of a plane of the respective heat sink plate, each heat sink plate further includes a base part with an opening, wherein the base part of the top plate is on top of the base part of the bottom plate and wherein a heat dissipating fin of the bottom plate is bent and extends through the opening in the top plate,
- a heatsink base wherein the plurality of N heat sink plates are mounted, wherein each heat sink plate has a thickness T and the heatsink base comprises a profile step with a profile size Ps according to the relation
- Ps=O/N, wherein
- O is the distance between two adjacent first edges of the at least two heat dissipating fins in the base part of the top heat sink plate transverse to the first edge, and Ps is measured along the plane P of the base part of the top heat sink plate in a direction transverse to the first edge, each step having a height H essentially equal to said thickness T.
1 more element
Dependencies are inferred from the claim text.