Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Having separate expander means – Bulged by axially contracting ends
Patent
1986-05-29
1988-01-19
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Having separate expander means
Bulged by axially contracting ends
411 37, 411 55, 411 57, 411 60, F16B 1306
Patent
active
047202246
ABSTRACT:
A sleeve anchor for use in a pre-drilled hole in concrete, masonry and the like includes a bolt with threaded outer end for receiving an internally threaded pressure member, e.g., a nut. The inner end defines a shank terminating in a head of diameter greater than the shank. The head has a tapered wedge-forming shoulder adjoining the shank. A sleeve is disposed concentrically upon the bolt and includes a collar extending along a threaded portion of the bolt at its upper outer end is disposed for receiving longitudinal pressure toward the inner end of the bolt generated by tightening of the nut. An inner portion of the collar is of petalform configuration, having three petals extending along the shank in closely-spaced side-by-side relationship. The petals are joined at proximal ends to the collar by respective pillars each of narrow arcuate extent, providing windows between the pillars of greater arcuate extent. The pillars have distal ends which contact and ride up the shoulder for radially outward expansion of the sleeve upon tightening of the pressure member. The distal ends of the petals each have a lobular prominence whereby together they form in section an enhanced hexagon or trilobular configuration. Further, each petal forms at its proximal end a singular ear along a leading side edge, formed by an outwardly extending corner portion, for providing gripping antirotational engagement of interior surfaces of the hole upon insertion of the anchor. The sleeve is formed of resilient, ultimately deformable metal to permit torsional distortion of the pillars upon tightening of the pressure member, causing foreshortening of the sleeve to provide pre-loading of the anchor within the hole.
REFERENCES:
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patent: 3668968 (1972-06-01), Modrey
patent: 3750519 (1973-08-01), Lerich
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patent: 4330230 (1982-05-01), Giannuzzi
patent: 4334813 (1982-05-01), Oettl
Lindsey Rodney M.
Smith Gary L.
United Industries Corporation
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