Ladder, overmolded foot and method
A ladder having a first rail having a bottom and a web, a first flange attached to a first end of the web and a second flange attached to a second end of the web. The ladder having a second rail. The ladder having rungs attached to the first rail and second rail upon which a user steps to climb the ladder. The ladder having a foot having a plastic body with a recess which receives the end of the first rail and is positioned about and conforms to the web and the first and second flanges of the first rail. The foot has a plastic base having a top side from which the body extends. The base has an edge positioned about the body with perforations, and a rubber tread disposed along a underside of the base and extending through the perforations and along the edge on the top side of the base to form an overmolded portion of the tread that attaches the tread to the base without any mechanical or other types of fasteners. The rubber tread forms a bond with the underside of the base and the edge on the top side of the base. The foot for a bottom of a rail of a ladder. A method for placing a ladder. A method for producing a foot for a bottom of a rail of a ladder.
1. A ladder comprising:
a first rail having a bottom and a web, a first flange attached to a first end of the web and a second flange attached to a second end of the web;
a second rail;
rungs attached to the first rail and second rail upon which a user steps to climb the ladder; and
a foot having a plastic body with a recess which receives the bottom of the first rail, the body envelopes; surrounds and conforms with the web and the first and second flanges of the first rail, the body having a c-shaped cross-section, the foot having a plastic base having a top side from which the body extends, the base having an edge surrounding and positioned outside of the body and extending horizontally outwards from the body, the edge having perforations positioned outside the body and a rubber tread disposed along an underside of the base and extending through the perforations along the edge on the top side of the base to form an overmolded portion of the tread that attaches the tread to the base, the rubber tread forming a bond with the underside of the base and the edge on the top side of the base.
2. The ladder of claim 1 wherein the overmolded portion of the tread disposed along the edge on the top side of the base extends to the body.
3. The ladder of claim 2 wherein the body has a perimeter that abuts the overmolded portion of the tread on the top side of the base.
4. The ladder of claim 3 wherein each perforation is between 0.6 and 0.15 inches wide.
5. The ladder of claim 4 wherein the perimeter is a first wall, a second wall directly connected to the first wall, a third wall directly connected to the second wall and a fourth wall directly connected to the third wall.
6. The ladder of claim 5 wherein the recess is defined by a fifth wall that directly connects to and extends essentially perpendicular from the second wall, a sixth wall that directly connects to and extends essentially perpendicular from the fifth wall and in parallel and in spaced relation with the second wall, a seventh wall that directly connects to and extends essentially perpendicular from the sixth wall and in parallel with and in spaced relation with the third wall, an eighth wall that directly connects to and extends essentially perpendicular from the seventh wall and in parallel and spaced relation with the third wall, and a ninth wall that directly connects to and extends essentially perpendicularly from the eighth wall to the fourth wall and directly connects to the fourth wall.
7. The ladder of claim 6 wherein the first wall directly extends less than an inch from the base, and the second through ninth walls extend more than 2 inches from the base.
8. The ladder of claim 7 wherein the first wall is in spaced relation with and at least 1 inch apart from the fifth and ninth walls and the seventh wall is in spaced relation and at least about 2 inches apart from the first wall.
9. The ladder of claim 8 wherein the body has an open area between the first wall and the fifth through ninth walls.
10. The ladder of claim 9 wherein the body and base are one piece.
11. The ladder of claim 10 wherein the underside of the base is flat.
12. The ladder of claim 11 wherein the third wall and the seventh wall have rivet holes in which rivets 68 extend through and into the first rail to attach the foot to the rail.
13. A foot for a bottom of a first rail of a ladder comprising:
a plastic body with a recess which receives the end of the first rail, the body envelopes, surrounds and conforms with a web and first and second flanges of the first rail, the body having a c-shaped cross-section;
a plastic base having a top side from which the body extends, the base having an edge surrounding and positioned outside of the body and extending horizontally outwards from the body, the edge having perforations positioned outside the body; and
a rubber tread disposed along an underside of the base and extending through the perforations and along the edge on the top side of the base to form an overmolded portion of the tread that attaches the tread to the base without any mechanical or other types of fasteners, the rubber tread forming a bond with the underside of the base and the edge on the top side of the base.
14. The foot of claim 13 wherein each perforation is between 0.06 and 0.15 inches wide.