1975-12-05
1977-03-15
Frazier, Roy D.
F16B 1304
Patent
active
040117863
ABSTRACT:
An expandable dowel for insertion into a borehole comprising an expandable sleeve with one or more slots extending from one end thereof and expandable by at least one expanding member which engages the slotted sleeve, a screw-threaded bolt which is in screw-threaded engagement with the expanding member and has a shaft which is passed through a spacer sleeve adjacent the unslotted end of the expandable sleeve. The spacer sleeve is retained on the screw-threaded bolt by a bolt head or a nut screwed upon the screw-threaded bolt. The spacer sleeve, or a washer located between the spacer sleeve and said bolt head or nut is/are constructed so that it/they can be elastically or plastically deformed up to a predetermined amount by a force which acts axially of the bolt.
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patent: 3468091 (1969-09-01), Gerhard
patent: 3735665 (1973-05-01), Mortensen
patent: 3911782 (1975-10-01), Liebig
Frazier Roy D.
Holko Thomas J.
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