Very high-acceleration tolerant circuit card packaging structure

Abstract From the Canadian patent

A very high acceleration tolerant packaging structure 10 for protecting electronic circuit elements such as printed circuit cards 35 or ceramic cards. A rigid housing 15 has at least one planar member 35 for supporting electronic circuitry thereon mounted within, the housing so as to divide the interior of the housing into at least two chambers 50, 52. Each chamber is completely filled with a substantially incompressible fluid 60 so as to leave no air spaces or voids. The fluid in one chamber communicates with the fluid in another chamber only at a controllable rate. Preferably the planar members 35 have substantially the same shape as the cross sectional shape of the interior of the …