Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1982-06-22
1986-07-29
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 60, 411 65, F16B 1306
Patent
active
046029028
ABSTRACT:
An expansion dowel assembly includes an axially elongated sleeve having a leading end and a trailing end, an axially extending spreading member located within the sleeve adjacent its leading end, and a threaded bolt extending into the trailing end and toward the leading end of the sleeve. The threaded bolt is axially movable within the sleeve between a first position where the dowel assembly can be inserted into the borehole and a second position where the bolt is driven further into the sleeve into expanding contact with the spreading member for radially expanding the spreading member and the sleeve. An abutment is provided for the leading end of the dowel assembly to prevent displacement of the spreading member out of the sleeve when the bolt is driven from the first position toward the second position.
REFERENCES:
patent: 777399 (1904-12-01), Church
patent: 839705 (1906-12-01), Bennett
patent: 943906 (1909-12-01), Zifferer
patent: 3200693 (1965-08-01), Dickow
patent: 3623396 (1971-11-01), Mortensen
patent: 3739684 (1973-06-01), Vitkevich
patent: 4088054 (1978-05-01), Lippacher et al.
Hilti Aktiengesellschaft
Holko Thomas J.
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