Dynamic, user-controlled pivot constraints for wheeled carts
Publication Date: 2017-Jun-01
The IP.com Prior Art Database
Dynamic, User-controlled Pivot Constraints for Wheeled Carts
Disclosed is an accessory that attaches to any cart that has four standard non-fixed casters and enables the operator to lock either a front wheel or a rear wheel for better maneuverability and control of the cart.
Existing shopping/industrial carts can either have four swiveling wheels or two rear wheels that do not swivel. Four-wheel swivel carts are difficult to control. Fixed rear wheels provide better maneuverability over distances, while fixed front wheels are better for backing into a small space (e.g., in a warehouse). Existing four-wheel diamond patterns allow an operator to turn the cart on the two fixed wheels at the middle of the cart by rocking the cart to lift rear and front wheels off the ground; however, this is awkward, does not support heavy loads, and does not afford the tight turning for backing into a small space. Some custom cart wheels are configurable to fixed or swivel operation; however, this requires the acquisition of custom cart wheels and the operator must crawl on the floor to make the adjustments, which is undesirable. The novel contribution is an accessory that attaches to any cart that has four standard non-fixed casters and enables the operator to lock either a front wheel or a rear wheel for better maneuverability and control of the cart. A shift lever fixes rear or front wheel(s) on cart for better control without the operator having to move from one end to the other to push. Th...