Fixing element for anchoring in a hole drilled in a concrete part
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United States of America Patent
Stats
-
Dec 31, 1991
Grant Date -
N/A
app pub date -
May 6, 1991
filing date -
May 7, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The fixing element for anchoring in a hole drilled in a concrete part includes a threaded bolt, an expansible body with an expander cone and an expansible sleeve having an internal bore. The expansible sleeve has longitudinal slots extending from its front end and the expansible body is joined to the threaded bolt for expansion in the drilled hole. To ensure that the fixing element can continue to at least partially hold after experiencing a sever excessive stress such as occurs during an earthquake, the internal bore (14) of the expansible sleeve (11) has a first cylindrical portion (14a) in its front end, which has a length corresponding approximately to the length of the expander cone (5) and the diameter of the first cylindrical portion (14a) corresponds to the smallest expander cone diameter. The internal bore (14) also has a second, conically widening portion (14b) connected to the first cylindrical portion and a third cylindrical portion (14c) which extends from and is connected to the second conically widening portion. The third cylindrical portion (14c) has a diameter which corresponds to the largest diameter of the second conically widening portion. The longitudinal slots (12) terminate in the conically widening portion (14b) of the internal bore (14).
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Cited Art Landscape
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