COMPACT WHEELED CARRIER DEVICE WITH MOVABLE, STOWABLE REAR WHEELS AND FRAME

摘要

A wheeled cart includes a number of unique methods to synchronously stow all of the rear wheels of a fold flat, compact wheeled cart device without removing any of the wheels themselves and the innovations are applicable to cargo carriers, golf bag carts, trolleys, baby strollers, and other devices for moving cargo. In alternative designs, the folding motion of either the forward wheel frame, or the swiveling motion of the rear wheel frame, or both, synchronously setup or stow the cart's at least two rear wheels to achieve an ultra-thin stowed profile, orienting all the cart's wheels in a co-planar stowed relationship, closely parallel with all other parts.

主权项

1. A foldable wheeled cart, said cart comprising:
a forward frame forming a plane in the latitudinal direction and forming a side elevational profile, including a front portion and a rear portion; at least one front wheel movably mounted to the front portion of the forward frame; an upper frame movably mounted at its lower portion to the rear portion of the forward frame, including a push-pull handle at the upper portion of the upper frame; a rear wheel mounting frame movably mounted near the rear portion of the front frame including at least two rear wheels, each rear wheel movably mounted at each of two opposite sides of the rear wheel mounting frame forming a rear frame plane in the latitudinal direction between the rear wheels, wherein: the foldable wheeled cart has an operational position and a stowed position and in both positions the wheels remain movably mounted, in the operational position, each front and rear wheel is rotatable 360° in its longitudinal rolling plane along an axle through each wheel's axis of rotation, enabling the wheels to turn, thereby allowing the cart to be pushed or pulled along a rolling surface, the rear mounting frame is perpendicular to the forward frame, and the upper frame extends upward and away from the forward frame; and in the stowed position, each wheel has been swept through an angle, relative to the operational position, so that the plane of each of the wheels' axis of rotation are linearly aligned and the rear wheel mounting frame are substantially co-planar with both the forward frame and the upper frame, all forming a side elevational profile.