Anti-Tip Chair Foot

摘要

Disclosed is an anti-tip chair leg extension device that is attachable to the foot of a chair leg to prevent or reduce the risk of the chair from tipping over backwards. This feature of the device is especially beneficial when a child is using the chair. The anti-tip leg extension device comprises: a leg receiver mounted on a footplate, and a grip means. The lower (or foot) portion of a rear leg of the chair leg is received into the leg receiver. The grip means (releaseably) holds the foot of the chair leg in place when the chair leg is received in the leg receiver. The footplate then acts to shift the distance of the moment-arm of the chair backward and away from the center of mass of the chair to reduce a tendency of the chair to tip backward

主权项

1. An anti-tip chair leg extension device (10) attachable to a foot (62) of a rear chair rear leg (60) comprising:
a foot plate (12) having a front-portion (20) and a back-portion (22), a top-surface (24) and a bottom surface (26); a leg receiver (14) into which the rear leg (60) is receivable, the leg receiver (14) having an upper-end and a lower end, the upper-end having an opening (40) into which the foot end (62) of the rear leg (60) is insertable and the lower-end being mounted to the upper surface (24) of the foot plate (12), and having a front-side wedge grip key (16) for engaging the chair leg (60) at a lower portion of the foot (62) of the leg (60) and a back-side wedge grip key (16) for engaging the foot (62) of the chair leg (60) at an upper portion; and a leg grip wedge (18) adapted to engage the wedge key grip (16) and to releaseably grip the foot (62) of the chair leg (60) when the chair leg (60) is received in the leg receiver (14),in combination to provide the device (10) adapted to shift the distance of a moment-arm of the chair backward from a center of mass of the chair to reduce a tendency of the chair to rotate backward.