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Patexia Research
Patent No. US 11162298
Issue Date Nov 2, 2021
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Patent 11162298 - Compressible pillar for a vacuum insulated glazing unit > Claims

  • 1. A compressible pillar for the preparation of a vacuum insulated glazing (VIG) unit, having a longitudinal extent in the pre-compressed state and comprising a deformable part having an open structure, which open structure will at least partially collapse when the pillar is subject to a compression force acting in the longitudinal direction of the pillar, so that the pillar will exhibit a deformation causing a reduction in the longitudinal extent of the pillar when the pillar is subjected to said compression force, the compression force being of at least one value selected within the range of 60 N to 320 N, the pillar comprises a first end structure and a second end structure having a first and a second substantially plane end surface, respectively, for abutting with the glass panes of the VIG-unit, which end surfaces extend substantially in parallel,wherein the deformable part of the pillar connects the first end structure and the second end structure, andwherein the pillar is formed with a substantially uniform cross-section in parallel planes perpendicular to the first and the second end surfaces, andwherein the first end structure, the second end structure and the deformable part form a cross-section in said parallel planes of essentially the shape of a capital sigma.
    • 2. The compressible pillar according to claim 1, wherein the compression force is at least one value selected within the range of 140 N to 230 N.
    • 3. The compressible pillar according to claim 1, wherein the deformable part comprises a first element extending from the first end structure towards the second end structure at a first slanted angle to the longitudinal direction of the pillar and a second element extending from the second end structure towards the first end structure at a second slanted angle to the longitudinal direction of the pillar, the first and the second slanted angles being of substantially the same magnitude so that the first element and the second element are slanted in opposite directions.
      • 4. The compressible pillar according to claim 3, wherein the first element and the second element of the deformable part of the pillar are joined in a joining part of the deformable part, wherein the joining part is formed with a partly annular cross-section with a curved transition to the first and second elements.
    • 5. The compressible pillar according to claim 1, wherein the deformable part of the pillar comprises two structures separately connecting the first end structure and the second end structure.
      • 6. The compressible pillar according to claim 5, wherein each of said structures comprises a first element extending from the first end structure towards the second end structure at a first slanted angle to the longitudinal direction of the pillar and a second element extending from the second end structure towards the first end structure at a second slanted angle to the longitudinal direction of the pillar, the first and the second slanted angles being of substantially the same magnitude so that the first element and the second element are slanted in opposite directions.
        • 7. The compressible pillar according to claim 6, wherein the first element and the second element of each of said structures of the deformable part of the pillar are joined in a joining part of the deformable part, wherein the joining part is formed with a partly annular cross-section with a curved transition to the first and second elements.
    • 8. The compressible pillar according to claim 1, wherein the first end structure, the second end structure and the deformable part form a cross-section in said parallel planes of essentially the shape of a capital sigma joined with a mirrored capital sigma.
    • 9. The compressible pillar according to claim 1, wherein the pillar when said compression force is released will expand in the longitudinal direction of the pillar with a relative expansion in the longitudinal direction of the pillar in the range of 0.5% to 50% of the relative reduction.
    • 10. The compressible pillar according to claim 1, wherein the relative reduction in the longitudinal extent of the pillar when the pillar is subjected to said compression force to being equal to a compression factor times the compression force, the compression factor being in the range of 0.8·10−3 N−1 to 5.0·10−3 N−1.
    • 11. A compressible pillar according to claim 1, wherein the longitudinal extent in the pre-compressed state is in the range of 0.2 mm to 1.2 mm.
      • 12. The compressible pillar according to claim 11, wherein the longitudinal extent in the pre-compressed state is in the range of 0.3 mm to 0.8 mm.
    • 13. The compressible pillar according to claim 1, wherein said open structure of the pillar is made from metal.
      • 14. The compressible pillar according to claim 13, wherein said metal has compressive yield strength higher than 1 GPa at 20° C.
      • 15. The compressible pillar according to claim 13, wherein said metal is an austenitic nickel-chromium-based superalloy.
    • 16. The compressible pillar according to claim 1, wherein the pillar comprises a first end structure and a second end structure having a first and a second substantially plane end surface, respectively, for abutting with the glass panes of the VIG-unit, which end surfaces extend substantially in parallel.
      • 17. The compressible pillar according to claim 16, wherein the first end structure and the second end structure each has an extent in the longitudinal direction of the pillar in the range of 0.025 mm to 0.1 mm.
      • 18. The compressible pillar according to claim 16, wherein said first and second substantially plane end surfaces each has an area in the range of 0.1 mm2 to 0.3 mm2.
    • 19. A method of producing a vacuum insulated glazing (VIG) unit comprising the steps of: providing a first and second substantially parallel panes of glass and a plurality of compressible pillars according to claim 1 provided between the first and second panes to ensure a minimum distance between the panes,forming a void between the first and the second panes and a peripheral seal, andevacuating the void whereby the pillars are compressed between the first and the second pane.
    • 20. A vacuum insulated glazing (VIG) unit comprising a first and second substantially parallel panes of glass and a plurality of compressible pillars according to claim 1 provided between the first and second panes the pillars being compressed between the first and the second pane,a void formed between the first and the second panes and a peripheral seal, wherein the void is evacuated.
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