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Attachment member for insulation panels

  • US 5,171,118 A
  • Filed: 12/20/1991
  • Issued: 12/15/1992
  • Est. Priority Date: 12/24/1990
  • Status: Expired due to Term
First Claim
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1. Attachment member for use in securing insulation panels (2) to a structural component (A) comprising an axially extending tubular shaft (4) having a first end and a second end spaced apart in the axial direction, a large area annular head (3) secured to the first end of said shaft (4) and extending transversely of the axial direction radially outwardly from the shaft, said head (3) and shaft (4) define an axially extending passageway (4b) having a first diameter located intermediate the first and second ends of said shaft, said shaft having an abutment therein extending transversely of the axial direction and stepped radially inwardly from the first diameter, said abutment arranged as a stop for a fastening element (5) used for fixing the attachment member (1) to the structural component (A), and flexible sector-shaped parts (6) located in said passageway in the axial region of said head (3) and extending radially inwardly from said head, said sector-shaped parts (6) extend perpendicularly to and radially inwardly toward the axis of said shaft and have a thickness extending in the axial direction of said shaft, wherein the improvement comprises that said passageway (4b) extending from said head (3) and the first end of said shaft (4) has an axially extending section (4d) with an enlarged diameter increased by at least twice the thickness of one of said sector-shaped parts (6) as compared to said first diameter and said section (4d) has an axial length equal to at least a free length of one of said sector-shaped parts, and the axially extending increased diameter section in the axial region of said head has chamfers (7) widening in the direction from the first end of said shaft (4) toward said head (3).

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