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 module for the construction of a recreational track, particularly a bicycle track having a frame on which the modules are placed, wherein the module has an upper part intended for riding and making a curved surface, and in the top view it has a quadri- lateral-like shape with two sides in the shape of arches, a rear wall and a front wall, wherein the rear wall and the front wall form the base of the module, as well as the left face wall and the opposite right face wall, which are placed between the rear wall and the front wall, characterized in that in the side view, the rear wall has the quadrilateral shape, the sides of which converge upwards at an acute angle, and in the side view the front wall has the shape of an arc connecting the upper part with the base of the module.

A module for the construction of a recreational track, particularly a bicycle track having a frame on which the modules are placed, wherein the module has an upper part intended for riding and making a curved surface, and in the top view it has a quadri- lateral-like shape with two sides in the shape of arches, a rear wall and a front wall, wherein the rear wall and the front wall form the base of the module, as well as the left face wall and the opposite right face wall, which are placed between the rear wall and the front wall, characterized in that in the side view, the rear wall has the quadrilateral shape, the sides of which converge upwards at an acute angle, and in the side view the front wall has the shape of an arc connecting the upper part with the base of the module.

A modular connector system for facilitating the construction of a playing area or non-playing area, such as an outdoor or backyard ice hockey or skating rink, a netted or lighted area, sand box, garden, and the like. Spanning boards and/or inserted poles can be used to join side connectors to corner connectors and to side connectors to form a free standing, fully enclosed, partially enclosed, walled-in, netted, or partitioned area.

A modular connector system for facilitating the construction of a playing area or non-playing area, such as an outdoor or backyard ice hockey or skating rink, a netted or lighted area, sand box, garden, and the like. Spanning boards and/or inserted poles can be used to join side connectors to corner connectors and to side connectors to form a free standing, fully enclosed, partially enclosed, walled-in, netted, or partitioned area.

The invention relates to a cover arrangement for an ice rink. The cover arrangement comprising a flexible cover part having an area at least as large as the area of the ice of the ice rink, wherein the cover arrangement further comprises fixing elements arranged along the periphery of the flexible cover part for detachably fixing the flexible cover part to boards surrounding the ice such that a space is formed between the ice and the flexible cover part.

[Problem to be solved]

To provide a wave making apparatus for surfing that can make a so-called tubular curling wave suitable for surfing and in which a breaking portion and about to break portion are arrayed in a line.

[Solution]

The wave making apparatus comprises: a water carrying bucket 110 opened at the front, including a bottom plate and a side surface plate, and capable of holding water in a portion of an inner space thereof; a supporting structure 120 that supports the water carrying bucket 110; and a transmission apparatus 130 that moves the water carrying bucket 110 forward at a predetermined speed. The water carrying bucket 100 supported by submerging the water carrying bucket 110 under waterline of the pool such that the front of the water carrying bucket 110 faces the play area of the pool. The transmission apparatus 130 moves the water carrying bucket 110 forward along a track extending forward the play area with the water carrying bucket 100 kept below the waterline. The water held in the water carrying bucket 100 is carried forward and launched, and thereby an isolation traveling wave suitable for surfing is formed.

A wave generating apparatus mobile application controller and method are provided in which a mobile controller actuates a plurality of wave generating chambers in sequence using a delay between the actuation of each chamber to produce a rideable wave in a pool. The mobile application controller allows the user to select the exact type of wave to be produced by the wave generator apparatus by selecting the size, shape, and pattern of the wave. The application also allows the user to use a camera to photograph or record herself or someone else, even while riding a wave.

Rate of deceleration is an important factor in determining the severity of injuries, such as head and neck injuries, possibly sustained when participants collide with a wall assembly while playing, for example, ice hockey. The described wall assemblies each include a support assembly and a movable wall assembly supported by and movable with respect to the support assembly. Telescoping parts of the movable wall assembly enable deflection of the movable wall assembly to complex angles with respect to the support assembly. In addition, movable wall assemblies can be couple such that impact on one wall assembly can cause deflection of an adjacent wall assembly. Covers, shields, and spacers can be positioned to decrease gap formation during deflection of the movable wall assembly to reduce the risk of pinch points.

A transcritical R-744 refrigeration system, especially used for refrigerating a skating rink, has a heat exchanger between the gas cooler followed by a throttling device and the flash tank (or receiver), in order to eliminate the need of a flash-gas bypass. The heat exchanger connects to an external mechanical refrigeration system operating at a higher evaporating temperature than the transcritical R-744 refrigeration system, and generally totally condenses the vapor of the R-744 refrigerant before it reaches the flask tank. A method for improving the energy efficiency of the transcritical R-744 refrigeration system is also disclosed.