Abstract: A handcart includes a handle, a cart frame and combination members. The handle and the cart frame are firmly combined together by the combination members, which are respectively composed of two combination seats, two fixing seats and an adjustment member. The combination seats and the fixing seats, which are made of metallic or non-metallic material, are firmly fixed in position by the combination members, and the adjustment member can be operated to have two retractable rods retracting inward and extending outward; therefore, the handle of the handcart of this invention is extensible and can be stably combined together with the cart frame, able to reinforce the structure of the handcart.

Abstract: A handcart includes a handle, a cart frame and combination members. The handle and the cart frame are firmly combined together by the combination members, which are respectively composed of two combination seats, two fixing seats and an adjustment member. The combination seats and the fixing seats, which are made of metallic or non-metallic material, are firmly fixed in position by the combination members, and the adjustment member can be operated to have two retractable rods retracting inward and extending outward; therefore, the handle of the handcart of this invention is extensible and can be stably combined together with the cart frame, able to reinforce the structure of the handcart.

Abstract: The invention relates to a handcart composed of a main frame, four wheels properly assembled with a frame rod of the main frame, a grip, two positioning sleeves combined movably with the grip, and two joint assemblies installed between the main frame and the grip for changeably connecting the main frame with the grip. The grip together with the positioning sleeves can be aligned flat or become 90° relative to the main frame by means of the joint assemblies. Then the handcart can be transformed into a two-wheel handcart or a four-wheel one by handling the grip through movement of the pivotal bases of the joint assemblies.

Abstract: The invention relates to a handcart composed of a main frame, four wheel sets properly assembled under the main frame, a grip, two positioning sleeves, and two joint assemblies installed between the main frame and the grip for changeably connecting the main frame with the grip. The grip can be aligned flat or become 90° to the main frame by means of the joint assemblies. Then the handcart can be transformed as a two-wheel handcart or a four-wheel one by handling the grip through movement of the pivotal connecting bases of the joint assemblies and combining the grip with the positioning sleeves movably fitted in positioning holes of the grip.

Abstract: The invention relates to a handcart composed of a main frame, four wheel sets properly assembled under the main frame, a grip, two positioning sleeves, and two joint assemblies installed between the main frame and the grip for changeably connecting the main frame with the grip. The grip can be aligned flat or become 90° to the main frame by means of the joint assemblies. Then the handcart can be transformed as a two-wheel handcart or a four-wheel one by handling the grip through movement of the pivotal connecting bases of the joint assemblies and combining the grip with the positioning sleeves movably fitted in positioning holes of the grip.

Abstract: The invention relates to a handcart composed of a main frame, four wheels properly assembled with a frame rod of the main frame, a grip, two positioning sleeves combined movably with the grip, and two joint assemblies installed between the main frame and the grip for changeably connecting the main frame with the grip. The grip together with the positioning sleeves can be aligned flat or become 90° relative to the main frame by means of the joint assemblies. Then the handcart can be transformed into a two-wheel handcart or a four-wheel one by handling the grip through movement of the pivotal bases of the joint assemblies.

Abstract: A hand truck includes a frame, a telescopic handle pivotally connected with the frame, and a joint structure assembled between the frame and the handle. The frame is disposed with a collapsible wheel unit adjustable in position, and the handle and the frame can be bent and extended to a proper length and then fixed in position so that a user can push the hand truck with convenience. Further, the hand truck can be shaped alternately into a two-wheel vertical truck or a four-wheel platform hand truck.

Abstract: This invention is a castor, including the castor main body, brake system, directional system, release mechanism and a number of positioning elements. One side of the castor main body has a brake system and a directional system, allowing the user to easily carry out braking or release the brakes simply by pressing the brake system or directional system, making the brake flexible platelet move and press against the wheel surface. Also because the fluted disc on the brake system and the brake flexible platelet is combined into one, the fluted disc will, at the same time, move up and engage with the direction change fluted disc, applying the brakes and maintaining direction. By pressing down the directional system the castor can also be set to move in a straight line only.

Abstract: A hand truck includes a frame, a telescopic handle pivotally connected with the frame, and a joint structure assembled between the frame and the handle. The frame is disposed with a collapsible wheel unit adjustable in position, and the handle and the frame can be bent and extended to a proper length and then fixed in position so that a user can push the hand truck with convenience. Further, the hand truck can be shaped alternately into a two-wheel vertical truck or a four-wheel platform hand truck.

Abstract: The invention relates to a handcart composed of a main frame, a blocking board pivotally connected with the main frame, four wheel sets properly assembled under the main frame, and a foldable grip connected with the main frame. For operation, pull up the blocking board to stand vertically on the main frame to act as a deck and the grip to a proper position while using only two wheels to work. Also, four wheels can be used simultaneously to become a four-wheel handcart.

Abstract: A hand truck includes a bottom base, a reinforcing member, a positing device and a handle. The bottom base consists of a U-shaped tube and a bottom plate combined vertically with a lower end of the U-shaped tube, which has two elongate side vertical portions provided with a lengthwise center hole. The reinforcing member has two side vertical tubes and two lateral rods fixed between the two side vertical tubes, which fit tightly around an intermediate section of the two side vertical portions of the U-shaped for upgrading the strength of the U-shaped tube. The position device is to stabilize the handle at an adjusted position after moved up and down and adjusted in its height relative to the U-shaped tube.

Abstract: A handle-positioning device for a hand truck includes two position bases and a pull rod. The position base is respectively fixed on two vertical cross-shaped tubes combined with an inverted U-shaped handle of a hand truck. Each vertical tube has a position hole aligned to that of each position base. The pull rod has some elasticity, and two bent ends, which fit in the position hole of a washer fixed on each pull rod, that of each position base, that of each vertical tube and further in that of the handle to keep the handle at a certain height. The height of the handle is adjusted by handling the pull rod to let the two bent ends to retreat from only the position hole of the handle and then the handle can be moved up and down then positioned again at that adjusted position or height by handling the pull rod.

Abstract: A hand truck includes a bottom base, a reinforcing member, a positing device and a handle. The bottom base consists of a U-shaped tube and a bottom plate combined vertically with a lower end of the U-shaped tube, which has two elongate side vertical portions provided with a lengthwise center hole. The reinforcing member has two side vertical tubes and two lateral rods fixed between the two side vertical tubes, which fit tightly around an intermediate section of the two side vertical portions of the U-shaped for upgrading the strength of the U-shaped tube. The position device is to stabilize the handle at an adjusted position after moved up and down and adjusted in its height relative to the U-shaped tube.

Abstract: A handle positioning device for a hand truck includes a lateral rod, a pull rod, and a handle. The lateral rod has a slide groove respectively formed lengthwise in two end portions, and the pull rod has two bent ends fitting movably in the two slide grooves of the lateral rod. The handle has two side vertical rods, which fit respectively in the two ends of the lateral rod and provided with a plurality of position holes. When the handle is needed to be adjusted in its height, the pull rod is pushed to force the two ends to move inward to each other elastically in the two slide grooves of the lateral rod, and then the handle can be adjusted in its height by moved up or down, and then the pull rod is released to fit elastically in a new position hole in two side rods of the handle to keep immovable the handle at the newly adjusted height.

Abstract: A hand truck includes a main frame, a movable frame pivotally connected with the main frame, a wheel set, and a handle able to be connected with the main frame with its height adjustable or to be connected with a handle receiving short tube fixed upright on the main frame in case of transforming the two wheeled hand tuck, two wheel supporters fixed under the main frame for additionally combining two independent wheels for transforming the two wheeled hand truck into a four wheeled one.