Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1990-07-18
1991-08-27
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 44, 411 55, F16B 1306
Patent
active
050428888
ABSTRACT:
An anchor bolt having a spring member is provided, with the anchor bolt comprising a fastening sleeve, an expansion sleeve and an expansion body. The spring member is interposed between the fastening sleeve and the expansion sleeve, and the expansion body is disposed at one end portion of a threaded rod formed as an anchor main body and is adapted to be inserted deep in a hole of a concrete structure together with the threaded rod. The said fastening sleeve and spring member are loosely fitted on the threaded rod, wherein the fastening sleeve adapted to be fixed within an inlet portion of the hole compresses the spring member to urge the expansion sleeve toward the expansion body so as to be expanded thereby, thus preventing the anchor bolt from being removed from or being loosened in the hole. The fastening sleeve preferably comprises an opening through which an end portion of the spring member extends to be exposed for visual inspection. The expansion body may either be formed integral with the screw rod, or be formed as a nut mating therewith.
REFERENCES:
patent: 3922831 (1975-12-01), Fischer
patent: 3958488 (1976-05-01), Fischer
patent: 4028988 (1977-06-01), Schafers
patent: 4519735 (1985-05-01), Machtle
patent: 4613264 (1986-09-01), McIntyre et al.
Lindsey Rodney M.
Redman Jerry
Yugen Kaisha Shinjoseisakusho
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