Abstract: A wheel assembly for a baby stroller in which the wheel or wheels are mounted to the trailing portion of a linkage assembly that is pivotally carried at its midportion by a lower support. The leading portion of the linkage assembly is located ahead of the wheels and is connected by a tension spring to an upper support. Upward travel of the wheels is resisted by extension of the spring. The lower support mounts a lock movable into lock and release positions. In the lock position the lower support is prevented from rotating about a vertical axis relative to the upper support. In the release position such rotation can occur. Consequently, the baby stroller can be turned around and pushed in a direction opposite the original direction of travel once the wheel assemblies are properly oriented.

Abstract: A pet litter box made of relatively light weight, easily cleaned material which includes a bottom pan for collecting liquid waste, an upper box which closely interfits with the bottom pan to contain odors in the bottom pan, and a litter tray which is supported by the upper box. The litter tray includes an apertured flat sheet which supports a layer of litter. The litter acts as a liquid waste absorber and odor barrier, while allowing unabsorbed liquid waste to pass downwardly into the bottom pan. The apertured flat sheet is integral with a cellular structure to provide structural rigidity for supporting the weight of a pet without significant downward bowing of the sheet.

Abstract: A container closure for attachment to a threaded container neck and comprising a closure top having a pouring passage and an offcenter opening which receives a tube defining an air passage, the tube being adapted to extend to a position adjacent to the container bottom offset from its centerline, the tube including a check valve to admit air to the container while excluding liquid from the tube. The arrangement enables the pouring of a regular and steady stream of liquid from the container.