Browse Prior Art Database

Single Point Anchoring Retention Features for P4 CPU (Pentium 4 Central Processing Unit) Disclosure Number: IPCOM000013311D
Original Publication Date: 2001-Oct-23
Included in the Prior Art Database: 2003-Jun-18

Publishing Venue



The invention described here is for anchoring a planar with a P4 CPU or similar to the chassis in which it is mounted. The problem is that the next generation of CPUs have heavy heat sinks which require expensive packaging to protect the CPU to planar integrity in shipping. The heavy heat sinks tend to tear loose of the MB (Motherboard) in fragility and packaged test used to simulate the shipping environment. In order to reduce the stress on the MB and the cost of packaging a mechanical solution is proposed by this disclosure. The proposed solution consist of a hook spaced off the bottom of the planar that engages in a loop on the chassis enclosure. Shown is a planar with attached P4 and heat sink, top view: (see JPG figure P4planarwproccesor). Next is the hook portion of the disclosed invention as mounted to the back of the planar, see JPG figure P4planarbackwbrkt.jpg.). This consist of a spacer to space away from the components at the planar bottom and a metal hook part made from stamped sheet metal. see the following for the two individual pieces, see JPG figure P4brktwspacersidebyside.jpg) and together before attachment to the planar, (see JPG figure P4brktwspacerontop) , or see the following for the production version (see JPG figure assembly.jpg), and as mounted on the bottom of the planar, (see JPG figure P4planarbackwbrkt.jpg). Mounting is done through the benches that the heatsink sits on at the board's top side. This bracket is planned to be the same for all P4 product line with same heatsink type and is adaptable to all diverging heat sink types as well. The concept works for all planar P4 combinations that have planar board through holes to clamp the heatsink benches. The heatsink benches and the corresponding holes to mount them are in support of the heatsink to the planar top. This is insufficient to keep the heatsink from damaging the board during shipping due to the mass and acceleration of that mass during shipping. A more robust anchoring of the area under the P4 is required. Thus the single point hook mounted to the bottom of the planar under the P4 provides anchoring to the chassis via a loop in the same. See chassis picture with loop, (see JPG figure P4chassiswloop.jpg). Notice the blue outline around the loop, this represents an area for a loop mounted on a plate that would take up different positions on the chassis bottom to accommodate differing P4 locations on the planar. This is needed in order to use one chassis to fit different planars that have differing P4 locations. This can also be accommodated by different chassis for each planar. The next picture shows the spacer and hook sans planar going toward the loop as it would be when you slide the planar into place, (see JPG figure P4brktspacer towardloop.jpg), and finally the hook and spacer in the final position in the loop, (see JPG figure P4brktspacerinloop.jpg). The planar and P4 are now anchored to the chassis and can be shipped without extra expensive packaging needed. Present solutions mount the P4 through the planar directly to the chassis via threaded studs. Disadvantages of this method are the disassembly of the P4 is needed in order to remove the planar. Disclosed invention can have the P4 mounted on the planar outside of the enclosure and then put in place. Further disadvantage of the present solution is that it requires differing chassis for each differing location of the P4 (assumed on different planars). No spec puts the P4 in the exact location on the planar every time. The disclosed invention could be coupled with a floating plate which has the accepting loop mounted in the chassis bottom or could have separate chassis with differing loop locations. it will work in either case. 1