Hollow wall anchor
Patent 4500238 Issued on February 19, 1985. Estimated Expiration Date: 
September 27, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 27, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 06/425057 filed on 09/27/1982US Classes:411/30, Formed on expansible sleeve411/346, Channel shaped securing means411/61Folded blank typeExaminersPrimary: Holko, Thomas J.Attorney, Agent or FirmInternational ClassesF16B 13/00 (20060101)F16B 13/12 (20060101) AbstractA fastener useful for securing articles on a hollow wall, made of a thin sheet of metal, shaped as to provide two spreadable pointed thin blades for easy insertion into a wall where after the blades are spread apart by the insertion of a screw to form an anchor resisting withdrawal.Field of SearchFolded blank typeWith hole forming means Formed on expansible sleeve Serrated end 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 | |
