Expansion dowel assembly

Patent 4708551 Issued on November 24, 1987. Estimated Expiration Date:

January 8, 2005. 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.

Abstract Claims Description Full Text

Patent References

3232163

3491649

3662644

3854374

Impact dowel with expanding sleeve and spreading element Patent #: 4088054
Issued on: 05/09/1978
Inventor: Lippacher, et al.

Inventors

Assignee

Hilti Aktiengesellschaft

Application

No. 06/689664 filed on 01/08/1985

US Classes:

411/32, Made up of plural expansible segments or sections411/80.1, Comprising a head and expandable portions spread by fastener (e.g., drywall anchor)411/913, SELF-EXPANDING ANCHOR52/513Discrete dissimilar tie between stonelike components

Examiners

Primary: Wilson, Neill R.

Attorney, Agent or Firm

Toren, McGeady & Associates

International Classes

E04F 13/08 (20060101)
F16B 13/00 (20060101)

Foreign Application Priority Data

1984-01-09 DE

Abstract

An expansion dowel assembly is adapted to secure fastening plates in spaced relation onto a structure. The expansion dowel assembly includes an axially extending sleeve-like member including an expansion section arranged to be secured into the structure and a collar section. The collar section engages the facing plate between a bearing and an abutment. An axially extending part of the collar section between the bearing and the abutment is arranged to collapse in the axial direction so that the space between the bearing and the abutment corresponds to the wall thickness of the facing plate. The axially collapsible part permits the expansion dowel assembly to be used with facing plates of different thicknesses.