Expansion dowel for a structural component having a hollow space
Plastics material expansion dowel with wave-form slots Patent #: 4518291
ApplicationNo. 06/903636 filed on 09/04/1986
US Classes:411/80.1, Comprising a head and expandable portions spread by fastener (e.g., drywall anchor)411/340Securing means pivotable about axis transverse to fastener axis, e.g., toggle bolt, etc.
ExaminersPrimary: Wilson, Neill R.
Attorney, Agent or Firm
International ClassesF16B 13/04 (20060101)
F16B 13/12 (20060101)
F16B 13/08 (20060101)
F16B 13/00 (20060101)
AbstractA multi-function integrally molded plastic fastener for insertion within a hole in a wall for fastening objects to any of solid, thick or thin hollow walls. The fastener comprises a base element and an anchoring element with the base element being positioned within the hole and depending whether the wall is solid, thick or thin hollow wall, the anchoring element is positioned totally within, partially within and totally behind the wall respectively. The anchoring element is comprised of outstretched anchoring arms which are collapsible for insertion within the hole and which arms have interfitting sections of a sinusoidal wave configuration to minimize the cross section of the anchoring element and the width required for the hole. The ends of the arms, spaced from the base element, engage an external fastening member thereby providing a solid anchorage in any of a solid, thick or thin hollow wall.
Field of SearchBulged by axially contracting ends
Having wedge-shaped section acting in slot
Bulged portion having additional gripping means
Bulged portion including bend line or reduced section
Expander threadedly engaged by mover
Folded blank type
Securing means pivotable about axis transverse to fastener axis, e.g., toggle bolt, etc.
And biasing spring
Spring engaging securing means
Spring at opposite end from securing means
And discrete manual actuating means
And pivoted retention means
Channel shaped securing means
HAVING SEPARATE EXPANDER MEANS
INCLUDING SETTABLE MATERIAL