초록 ▼

An anchor for resisting a pulling force applied to a cable includes an expandable outer shell disposed in an opening in a floor, an outer wedge disposed in the shell and having wedge-shaped projections engaged with the inner wall of the shell, and a rotatable inner wedge below the outer wedge engage

An anchor for resisting a pulling force applied to a cable includes an expandable outer shell disposed in an opening in a floor, an outer wedge disposed in the shell and having wedge-shaped projections engaged with the inner wall of the shell, and a rotatable inner wedge below the outer wedge engaged with a short length of chain extending through the shell. A cable to be tensioned is attached to the short length of chain. Tension on the cable urges the inner wedge upwardly against the outer wedge which, in turn, is wedged in the interior of the shell to forceably expand the walls of the shell radially outwardly to embed the shell in the floor. The inner wedge is rotatable axially relative to the outer wedge between a first position, in which a wedging force is applied to the outer wedge in response to tensioning of the cable, and a second position, which allows removal of the inner wedge and the short length of chain from the outer wedge and the shell.

대표청구항 ▼

Anchor apparatus for being installed in an opening in a floor to anchor a cable in said opening, the anchor apparatus comprising: a hollow outer shell having an expandable wall; a hollow outer wedge having a side wall extending between a top edge and a bottom edge of the outer wedge, the side wall h

Anchor apparatus for being installed in an opening in a floor to anchor a cable in said opening, the anchor apparatus comprising: a hollow outer shell having an expandable wall; a hollow outer wedge having a side wall extending between a top edge and a bottom edge of the outer wedge, the side wall having a wedge-shaped outer surface for being disposed in the outer shell to engage the expandable wall of the outer shell; an inner wedge having a side wall extending between a top edge and a bottom edge of the inner wedge, the side wall of the inner wedge having an outer surface which tapers wider, away from an axis of the inner wedge, from the top edge toward the bottom edge of the inner wedge so that the widest portion of the tapered outer surface is adjacent the bottom edge of the inner wedge, the inner wedge being rotatable axially between a first position and a second position; the outer wedge having an interior surface having a first interior surface portion and a second interior surface portion, the first interior surface portion tapering wider, away from an axis of the outer wedge, so that the widest portion of the tapered first interior surface portion is adjacent the bottom edge of the outer wedge, the tapered outer surface portion of the inner wedge, in said first position, engaging the tapered first interior surface portion of the outer wedge; and means for being attached to a cable for use in urging the tapered outer surface of the inner wedge, in said first position, into engagement with the tapered first interior surface portion of the outer wedge in response to an upward force on the cable for forcibly wedging the tapered outer surface of the inner wedge against the tapered first interior surface of the outer wedge and for causing the wedge-shaped outer surface of the outer wedge to engage and forcibly expand the expandable wall of the outer shell; the second interior surface portion of the outer wedge being shaped to allow passage of said inner wedge and said cable-attaching means axially through the hollow interior of the outer wedge, when the inner wedge is rotated to said second position, so that rotation of the inner wedge to said first position will position the tapered outer surface portion of the inner wedge for wedging engagement with the tapered first interior surface portion of the outer wedge.