Foot for molded plastic furniture
A foot for molded plastic furniture has a pad portion made of a first plastic or thermoplastic rubber and an anchor portion made of a second harder plastic or metal. The anchor has a base with a substantially flat surface that is bonded to a substantially flat top surface of the pad. Preferably the anchor portion and pad portion are co-extruded. A projection having at least one rib extends from the base of the anchor and is inserted into a cavity in a furniture leg creating a reliable mechanical fit which resists removal of the foot from the leg.
1. A foot for molded plastic furniture comprising:
a pad portion having a substantially flat top surface and made of a plastic or thermoplastic rubber having a first hardness, the first hardness being not greater than 65 durometer on a Shore A hardness scale; the pad portion having a surface configured to contact a floor and
an anchor portion made of a second plastic or metal having a second hardness which is harder than the first hardness, the anchor portion comprising;
a base having a substantially flat first surface bonded to the substantially flat surface of the pad portion, and a top opposite the first surface; wherein the base has sidewalls and the pad portion extends over the sidewalls;
a projection integral to the base and having an outer surface that defines a cross-sectional shape of the projection; and
at least one rib on the outer surface of the projection.
2. The foot of claim 1 wherein the pad portion has a Shore A durometer of 60 and the anchor portion has a Shore D durometer of at least 74.
3. The foot of claim 1 wherein a cross-section of the projection is a polygon, a circle or an oval.
4. The foot of claim 1 wherein the pad portion and anchor portion were formed by co-extrusion of the pad portion and the anchor portion.
5. The foot of claim 1 wherein the pad portion has a cross-sectional area parallel to the top surface and the top surface has an area greater than 75% of the cross-sectional area of the pad portion.
6. The foot of claim 1 wherein the anchor portion also comprises of at least one additional projection integral to the base.
7. The foot of claim 1 wherein the plastic is a polyvinyl chloride, thermoplastic elastomers, polyurethane, mixture thereof or combination thereof.
8. The foot of claim 1 wherein the second plastic is a polyvinyl chloride, nylon, filled polypropylene, ABS, polycarbonate, mixture thereof or combination thereof.
9. A foot for an article of furniture, the foot comprising:
a) an anchor portion made of a first thermoplastic having a selected hardness, the anchor portion having a base, a self-centering surface, an alignment surface, a wedging surface, a grooving surface, and a retention surface, wherein the self-centering surface is configured to facilitate entry of the anchor portion into a receiving cavity of the article of furniture, the alignment surface is configured to align the anchor portion within the receiving cavity, the grooving surface is adjacent to the retention surface, and wherein the wedging surface, the grooving surface, and the retention surface are configured to cooperate with each other to form an indentation in a surface of a receiving cavity when the anchor portion is forcibly advanced within the receiving cavity, and the retention surface is configured to cooperate with the indentation to form an interlocking joint which opposes the removal of the foot from the article of furniture; and
b) a pad portion comprising a second thermoplastic having a second hardness which is less than the hardness of the first thermoplastic, the second hardness being not greater than 65 durometer on a Shore A hardness scale, the pad portion having a surface configured to contact a floor; wherein the pad portion and the anchor portion are bonded to one another;
wherein the base has sidewalls and the pad portion extends over the sidewalls.
10. The foot of claim 9 , wherein the first thermoplastic is selected from the group consisting of polyvinyl chloride, nylon, filled polypropylene, ABS, polycarbonate, and mixtures and combinations thereof.
11. The foot of claim 9 , wherein the first thermoplastic is polyvinyl chloride having a durometer hardness of at least 70 on the Shore D scale.
12. The foot of claim 9 , wherein the second thermoplastic is selected from the group consisting of polyvinyl chloride, thermoplastic elastomer, polyurethane, thermoplastic rubber, silicone, and mixtures and combinations thereof.
13. The foot of claim 9 , wherein the second thermoplastic is polyvinyl chloride having a durometer hardness of no more than 60 on the Shore A scale.
14. The foot of claim 9 , wherein the anchor portion and the pad portion are bonded together by either a co-extrusion bond or a co-injection molding bond.
15. The foot of claim 9 , wherein the anchor portion has a cavity adapted for receiving a protrusion from a wall of the receiving cavity.
16. The foot of claim 9 , wherein the anchor portion has a neck region.
17. The foot of claim 9 , wherein the first thermoplastic is polyvinyl chloride having a durometer hardness of at least 70 on the Shore D scale and the second thermoplastic is polyvinyl chloride having a durometer hardness of no more than 65 on the Shore A scale.