Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Including sleeve and distinct tapered expander
Patent
1994-05-20
1995-10-17
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Including sleeve and distinct tapered expander
411 33, 411 60, F16B 1304, F16B 1306
Patent
active
054584485
ABSTRACT:
An expansion bolt includes an elongated bolt body having a threaded section formed on one end and an expanded shoulder portion formed on an opposite end. An expansion cylinder slidably fits over the bolt body has a flat end supported by the shoulder and slits formed on the opposite end. An expanding ring has an inclined outer surface with the small end insertable into the slitted end of the expansion cylinder is slidably fit over the bolt body to have the small end thereof facing the slitted end of the expansion cylinder. A collar nut retains the expansion cylinder and the expanding ring on the bolt body with a support cylinder disposed between the collar nut and the expanding ring so that when the nut is tightened, the support cylinder forces the expanding ring toward the expansion cylinder to have the small end of the expanding ring wedge into and thus flaringly expand the slitted end of the expansion cylinder. The flaring tips of the slitted end are forced to be in tight contact engagement with a hole. The flaring tips also serve as ratchet members which partially penetrate into the side wall of the hole to prevent the expansion bolt from being withdrawn out of the hole.
REFERENCES:
patent: 665705 (1901-01-01), Summerer
patent: 2516554 (1950-07-01), Coyne
patent: 3709088 (1973-01-01), Pitzer
patent: 4714391 (1987-12-01), Bergner
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