Abstract: A handle of a push cart includes two rods slidably engaged in two tubes and each having a number of teeth. Two sleeves are secured on top of the tubes and each has a pair of lugs. Two pins are secured between the lugs. A resilient arm has two ends slidably engaged with the pins, the ends each includes a tooth for engaging with the teeth of the rods so as to secure the rods to the tubes. The teeth of the resilient arm are disengaged from the teeth of the rods when the resilient arm is depressed. A fence is secured to the sleeves for preventing the resilient arm from being depressed inadvertently.

Abstract: A handle device includes two tubes slidably engaged in two pipes which has a number of teeth. A handle is secured on top of the tubes and has a hand grip slidably engaged in the lower portion. Two blocks are secured to the lower ends of the tubes. Two catches are slidably engaged in the blocks. Two bars are slidably engaged in the catches and the blocks and coupled to the hand grip. The catches are forced to engage with the teeth when the hand grip is not pulled and are disengaged from the teeth so as to release tubes from the pipes when the hand grip is released.

Abstract: A suitcase made in a rectangular configuration having a retractable handle assembly detachably fastened to one long side thereof, the retractable handle assembly having wheel holders fixed thereto at the bottom to hold two wheels by bolts and lock screws, a hollow base frame fastened to one short side thereof to hold a retractable bracket, and a tie strap having a middle part detachably fastened to an opposite short side of the suitcase and two hooks on two opposite ends thereof hooked on the retractable bracket to hold a case, etc., outside the suitcase.

Abstract: A coat rack is disclosed having a plurality of resilient hook members fastened inside a chamber thereof and respectively disposed above a respective transverse groove for holding clothes by hangers. Each resilient hook member has a bottom hook controlled by a respective knob to close or open the respective transverse groove for hanging or removing a dress hanger.

Abstract: A folding tandem bicycle includes a front body part, a rear body part, an intermediate body part connected between the front body part and the rear body part by parallel pairs of upright tubes and pairs of connecting devices, a front transmission mechanism driven by a set of pedals through a front sprocket to rotate a front flywheel and a front wheel through a cable, and a rear transmission mechanism driven by a set of pedals through a rear sprocket to rotate a rear flywheel and a rear wheel through a chain. By disconnecting either one of each pair of connecting devices, the front body part, the intermediate body part and the rear body part are allowed to be folded up and attached with one another side by side. By disconnecting the intermediate body part from the front and rear body parts, the front and rear body parts are connected into a single-seat bicycle for one rider.