Concrete products locking cage spacer
View Patent ↗A spacer for spacing the reinforcing cage from the forms used in making concrete products. The spacer of the invention is made from plastic in the shape of a wheel with spokes that join an outer ring with an inner ring that engages a horizontal wire on the wire cage. The rings have gaps to provide for installation of the spacer on a cage wire. The gap in the outer ring is closed by a latch that when properly engaged, will lock the spacer in place on the wire, thus positively holding the spacer on the wire once it is locked in place.
1. A spacer for spacing a wire reinforcing cage from the forms used in making concrete products, the cage having spaced-apart horizontal and vertical wires, the spacer comprising:
an outer ring and an inner ring;
the inner ring forming a hub spaced radially from the outer ring for receiving a horizontal wire on a wire reinforcing cage;
spaced apart radially extending spokes connecting the outer ring and inner ring, the spokes having outer ends extending beyond the outer ring;
the outer ring and inner ring each having a gap between the same two adjacent spokes to provide for placing the spacer on a horizontal wire of a wire reinforcing cage with the wire extending through the hub;
a plurality of locking fingers inside the hub, the fingers extending at angles from radial lines to position the fingers to engage a horizontal wire on a wire reinforcing cage;
a latch formed in the outer ring at the gap in the outer ring, the latch being unlocked when the gap is open but becoming locked when the gap in the outer ring is closed by moving the two adjacent spokes toward each other; and
the outer ring having a second gap diametrically opposite the first gap to facilitate locking the latch in the first gap of the outer ring.
2. A spacer for spacing a wire reinforcing cage from the forms used in making concrete products, the cage having spaced-apart horizontal and vertical wires, the spacer comprising:
an outer ring and an inner ring;
the inner ring forming a hub spaced radially from the outer ring for receiving a horizontal wire on a wire reinforcing cage;
spaced-apart radially extending spokes connecting the outer ring and inner ring, the spokes having outer ends extending beyond the outer ring;
the outer ring and inner ring each having a gap between the same two adjacent spokes to provide for placing the spacer on a horizontal wire of a wire reinforcing cage with the wire extending through the hub;
a plurality of locking fingers inside the hub, the fingers extending at angles from radial lines to position the fingers to engage a horizontal wire on a wire reinforcing cage;
a latch formed in the outer ring at the gap in the outer ring, the latch being unlocked when the gap is open but becoming locked when the gap in the outer ring is closed by moving the two adjacent spokes toward each other;
the latch being comprised of a yoke having spaced-apart arms on one side of the gap in the outer ring, and a single arm on the side of the gap opposite to the yoke, the single arm being aligned with the yoke so that when the two spokes adjacent to the gap in the outer ring are moved toward each other, the single arm will enter the yoke and lock the latch;
the arms of the yoke having a plurality of teeth and the single arm opposite the yoke having corresponding teeth, whereby the teeth on the single arm and on the yoke when engaged will lock the latch; and
the yoke and the single arm opposite the yoke each have a boss positioned to prevent axial or torsional force from unlocking the latch.
3. A spacer for spacing a wire reinforcing cage from the forms used in making concrete products, the cage having spaced-apart horizontal and vertical wires, the spacer comprising:
an outer ring and an inner ring;
the inner ring forming a hub spaced radially from the outer ring for receiving a horizontal wire on a wire reinforcing cage;
spaced-apart radially extending spokes connecting the outer ring and inner ring, the spokes having outer ends extending beyond the outer ring;
the outer ring and inner ring each having a gap between the same two adjacent spokes to provide for placing the spacer on a horizontal wire of a wire reinforcing cage with the wire extending through the hub;
a plurality of locking fingers inside the hub, the fingers extending at angles from radial lines to position the fingers to engage a horizontal wire on a wire reinforcing cage;
a latch formed in the outer ring at the gap in the outer ring, the latch being unlocked when the gap is open but becoming locked when the gap in the outer ring is closed by moving the two adjacent spokes toward each other;
the latch being comprised of a yoke having spaced-apart arms on one side of the gap in the outer ring, and a single arm on the side of the gap opposite to the yoke, the single arm being aligned with the yoke so that when the two spokes adjacent to the gap in the outer ring are moved toward each other, the single arm will enter the yoke and lock the latch;
one of the arms of the yoke having a groove and the single arm opposite the yoke having a hook engageable with the groove, whereby the hook on the single arm and the groove in the yoke when engaged will lock the latch; and
the yoke and the single arm opposite the yoke each having a boss positioned to prevent axial or torsional force from unlocking the latch.