A combination ramp system includes a first ramp, a second ramp, a connecting assembly, and a shelf board assembly. The first ramp has a first connecting portion. The second ramp has a second connecting portion. The connecting assembly includes a first connecting member and a second connecting member. The first connecting member is provided with a first overlap groove abutting against the first connecting portion and a second overlap groove. The second connecting member is provided with a third overlap groove abutting against the second connecting portion and a fourth overlap groove. The shelf board assembly includes a first shelf board abutting against the second overlap groove, and a second shelf board abutting against the fourth overlap groove.

In a preferred embodiment a wheeled platform apparatus and method for use in rolling on a surface are provided. The apparatus includes a platform having a top surface, a bottom surface, a front portion, a center portion, a rear portion, and a first wheel and a second wheel that interface with or are positioned below the bottom surface of the platform to facilitate rolling movement of the platform. The apparatus may further include an attachment device interfacing with the top surface and the footwear, as well as a footrest to support the forefoot of another foot, or footwear.

A personal self-propelled vehicle for travelling on snow using ski comprises a closed-loop flexible ribbon configured to envelope the ski over its length so as to pass under at least a portion of a sliding surface, two rollers and configured for installation on longitudinally opposite ends of the ski and to interact with the ribbon. The roller is a driving roller and is engaged with a motor comprising a control means and with the ribbon to transfer force for translational movement thereof. The roller is a guiding roller. The ribbon canvas has multiple via openings divided by webs and substantially constitutes a lattice. Dimensions and positions of the openings and parameters of the webs between them are selected so the sliding surface of the ski abuts on snow through the openings during motion of the vehicle, while the webs sink in snow under load of the vehicle bearing the user and provide repulsion from snow packed by the ski, thus assuring the ski sliding in longitudinal direction.

The invention relates to a folding ski having an articulated connection. The technical problem is to configure a folding ski structure that will act as a classic ski, which means that the assembled structure of the folding ski will act as a uniform support. The folding ski of the invention comprises a ski front section, a ski rear section, an articulated connection that inseparably connects the ski front section with the rear section, a connecting plate intended to strengthen the articulated connection of the ski, the connecting plate comprising a front and rear base plate and a bridging plate, wherein a plurality of ribs and/or grooves in the shape of a circular arc are formed on the upper side of the front base plate and the rear base plate and a plurality of grooves and/or ribs are formed on the bottom side of the bridging plate so that each pair of a rib and a groove forms a positive lock connection that transfers longitudinal shear forces, and at least a part of the ribs is formed with at least one flap and the corresponding groove is formed with a notch which receives a flap so as to form a positive lock connection which also transfers vertical forces.

A folding pole (1) having four or five tubular portions (7-9), wherein, in assembled state, the tubular portions (7-9) are connected to one another by plug-in connections and oriented along the pole axis (32), and, when the pole is folded up, at least two or three tubular portions (8, 8′, 9) are connected only by a movable connecting element (16). The folding pole is characterized in that a conical closure plug (18) having an axial through-opening (64) is releasably inserted, preferably screwed, into the plug region (49, 17″) of the plug-in connections, and closes off the latter with respect to the following tubular portion, and wherein each of these conical closure plugs (18) has an axial slit (63) through which the pull cable (16) can be introduced into the through-opening (64) in the radial direction.

A frame of a snowshoe has an annular frame, a vamp, a plurality of teeth and an upper, wherein the annular frame is made from a metal pipe with a triangular cross-section, the front end of the annular frame is upturned, the middle portion of the annular frame is horizontal, and the rear portion of the annular frame is horizontal or upturned; the annular frame has a top surface for mounting a vamp and has a bottom surface with a sharp downward angle, and the lateral teeth for anti-skid effect are mounted on the bottom surface of the frame. The snowshoe is simple in structure, light and easy to carry, high in strength, and firm and stable to mount, and is lightweight, safe and skid proof when walking on the snow and is convenient for climbing, so that it is suitable for people who like snow sports.

A collapsible stunt ramp apparatus is provided. The collapsible stunt ramp apparatus includes a base support structure and a number of base support rods. The base support structure includes a number of slots. The slots are designed to receive the base support rods. The collapsible stunt ramp apparatus also includes a number of vertical support beams. The number of vertical support beams includes a pair of intermediate support beams that are designed to connect to the base support rods. The collapsible stunt ramp apparatus also includes a ramp platform. The ramp platform is designed to connect to the vertical support beams.

A module for construction of recreation track, especially bicycle one, having a framework on which the modules are being arranged, whereas the module has upper part intended for riding on it, constituting non-ruled surface, and in the top view it has tetragon shape with one rounded side, the first side wall and the second side wall, whereas the first side wall and the second side wall create base of the module, and the left front wall and opposite to it right front wall, located between the first side wall and the second side wall, characteristic in that, the left front wall and the right front wall form in the top view an acute angle (α), and the first side wall and the second side wall form obtuse angles with the upper part.

A sports ball rebound and boundary system including at least one portable post portion, configured to in use stand upright unsupported, and a barrier portion. The post portion and the barrier portion are configured for mutual releasable connection so that at least part of the barrier portion is extendible from the post portion to form a substantially vertically aligned planar barrier extending upwards from substantially ground level. The barrier portion is further configured to in use remain under sufficient tension to cause a ball or similar to rebound when striking the barrier.

A portable energy-saving and environment-friendly electric vehicle is light in weight, small in volume, convenient in electricity charging, and can be disassembled for portability in a backpack. The backpack is further furnished with a crank-handle generator to enable manpower electricity generation and working out simultaneously. This energy-saving and environment-friendly electric vehicle is mainly comprised of two adjustable skateboards and a support rod for adjusting speed and connecting a battery set. The battery set can be conveniently replaced roadside or at other locations. In a situation of power loss, manpower can be used to charge the battery set. Thus, the situation of power loss fully disabling the electric vehicle can be met. In addition, the battery set associated with the generator is reliable for charging mobile phones and computers.