Abstract: An assembly for a heat sink having a contact plate with opposing first and second faces, a plurality of fins extending from the first face of the contact plate, and a plurality of gaps between the fins. A retaining device has a first pair of opposing sides and a second pair of opposing sides, the first and second pairs of opposing sides surrounding an opening, the first pair of opposing sides having primary framing members, at least some of the primary framing members having a first end at a respective side and a distal free end, with at least one engagement member positioned proximate the distal free ends. The primary framing members define a receiving space for the heat sink. A metal spring is configured in a closed shape cross-section for engagement with the retaining device. The metal spring has a pair of elongated sides, a pair of truncated sides and heat sink engagement regions.

Abstract: An assembly for a heat sink having a contact plate with opposing first and second faces, a plurality of fins extending from the first face of the contact plate, and a plurality of gaps between the fins. A retaining device has a first pair of opposing sides and a second pair of opposing sides, the first and second pairs of opposing sides surrounding an opening, the first pair of opposing sides having primary framing members, at least some of the primary framing members having a first end at a respective side and a distal free end, with at least one engagement member positioned proximate the distal free ends. The primary framing members define a receiving space for the heat sink. A metal spring is configured in a closed shape cross-section for engagement with the retaining device. The metal spring has a pair of elongated sides, a pair of truncated sides and heat sink engagement regions.