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Built-up screen coupling structure

  • US 5,176,462 A
  • Filed: 11/30/1990
  • Issued: 01/05/1993
  • Est. Priority Date: 11/30/1990
  • Status: Expired due to Term
First Claim
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1. A built-up screen coupling structure, comprising:

  • at least two screen board frames, each of said screen board frames defining a side end having a slot formed within a top portion thereof and a plurality of relatively smaller openings along on outer side, said smaller openings defining therebetween a plurality of dividing planar portions of substantially equal dimension and spaced at equal intervals;

    at least one adjusting device mounted within one of said slots within the top portion of the side end of one of said screen board frames, said adjusting device having an L-shaped base, a top board, a compression spring and a bolt, said L-shaped base defining an inner wall having a first groove, a bolt hole and a second groove respectively formed therein, said top board being transversely fastened in the first groove of said L-shaped base and having a top board groove and a bolt hole respectively formed therein at locations substantially aligned with the second groove and the bolt hole of said L-shaped base, said bolt being respectively fastened in the bolt holes on said top board and said L-shaped base, said compression spring being sleeved on said bolt and retained between said top board and said L-shaped base;

    a plurality of fastening devices respectively fastened in said screen board frame smaller openings to secure at least two screen board frames together, said fastening devices substantially defining an inverter U-contour, having an inclined side wall obliquely extending downward from a vertical side wall, defining therein a retaining space for retaining a plate spring, said plate spring having a curved end fastened in a groove formed within said oblique side wall on an external surface and an opposite end retained within said retaining space; and

    at least one face panel having a set of notches formed therein and vertically aligned on a back side with a curved strip spring and a fastening element respectively secured therein for fastening in corresponding holes made on said at least two screen board frames.

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