Heat exchange – With retainer for removable article – Electrical component
Patent
1986-03-31
1987-09-08
Davis, Jr., Albert W.
Heat exchange
With retainer for removable article
Electrical component
165185, 361386, 174 16HS, F28F 700
Patent
active
046917659
ABSTRACT:
A heat sink positioned on a printed circuit (PC) board includes a generally planar center portion and first and second pluralities of spaced planar ribs extending generally transversely from respective lateral edges of the center portion. The heat sink is adapted for generally perpendicular mounting on the PC board and includes first, second and third mounting tabs respectively extending from the lower edges of the bottom lateral ribs of the first and second pluralities of lateral ribs as well as from the lower edge of the planar center portion. Each mounting tab is adapted for insertion within a respective aperture in the PC board and includes an elongated proximal portion and a distal end portion. The distal end portion of the mounting tab is wider than the proximal portion thereof and includes a pair of cam surfaces, each disposed on a respective lateral edge of the mounting tab and adapted to engage a respective edge portion of the PC board immediately adjacent to the PC board aperture when the distal end portion is rotationally displaced about the elongated proximal portion of the mounting tab resulting in the twisting thereof. Thus, the heat sink is mounted on the PC board in a positive locking manner. Rotation of the mounting tab and further engagement of the cam surfaces thereof with the edges of the PC board aperture provide more intimate heat sink-PC board contact which affords increased thermal transfer, more secure and stable heat sink mounting, and more reliable PC board assembly.
REFERENCES:
patent: 2201611 (1940-05-01), Del Camp
patent: 2395326 (1946-02-01), Handley et al.
patent: 4054901 (1977-10-01), Edwards et al.
patent: 4344106 (1982-08-01), West et al.
patent: 4388967 (1983-06-01), Breese
patent: 4609040 (1986-09-01), Moore
Catalog entitled AAVID, by Avid Engineering, Inc., p. 23, relating to heat sinks, May, 1983.
Davis Jr. Albert W.
Hill Thomas E.
Neils Peggy A.
O'Connor Cornelius J.
Zenith Electronics Corporation
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