A play surface marking system may include a first fabric strip configured to be attached to a play surface using a first adhesive strip and a second adhesive strip, wherein the first fabric strip defines a first boundary on the play surface and a second fabric strip configured to be attached to the play surface using a third adhesive strip and a fourth adhesive strip, wherein the second fabric strip defines a second boundary on the play surface.

An outdoor court line assembly includes a plurality of first court lines and a plurality of connecting edges. Each connecting edge is configured to connect two adjacent first court lines. The first court line includes a main body, a connecting seat connected to an end of the main body, and a first magnetic snap provided at the connecting seat. The first magnetic snap includes a first shell body and a first magnet inside the first shell body. The connecting edge includes a main body and two second magnetic snaps provided at two ends of the main body. The second magnetic snap includes a second shell body and a second magnet provided inside the second shell body. The second magnet is magnetically opposite to the first magnet.

A user-propelled collapsible apparatus comprises a body (1) provided with wheels (21) and a retractable handle means (3) for propelling the apparatus. Bracing means (5) is provided for the handle means, the bracing means being movable between a deployed configuration in which the bracing means supports the extended handle means and a stored configuration in which the bracing means lies substantially adjacent to the body.

A portable ice rink includes a wall formed of multiple wall members linearly disposed adjacent to one another to form a piecewise continuous wall that encloses a desired area, and also includes a chain of links disposed on the outside of the wall members for reinforcement. The rink may further include a waterproof tarp extending underneath the wall members and folded upwards along the outer side of the wall, with its edge tied to the change of links. The tarp can contain water which then freezes to form a skating surface. Curved wall members are provided to form a rink with round corners. Each wall member is a discrete unit, made of molded plastic, and having a hollow interior which can be filled with water (or other ballast). Each wall member is designed with stiffening features to maintain the flatness of its inner surface after filling.

A portable ice rink includes a wall formed of multiple wall members linearly disposed adjacent to one another to form a piecewise continuous wall that encloses a desired area, and also includes a chain of links disposed on the outside of the wall members for reinforcement. The rink may further include a waterproof tarp extending underneath the wall members and folded upwards along the outer side of the wall, with its edge tied to the change of links. The tarp can contain water which then freezes to form a skating surface. Curved wall members are provided to form a rink with round corners. Each wall member is a discrete unit, made of molded plastic, and having a hollow interior which can be filled with water (or other ballast). Each wall member is designed with stiffening features to maintain the flatness of its inner surface after filling.

A line striping system comprises a chassis, wheels, a spray system, a propulsion system and a steering system. The wheels are mounted under the chassis. The spray system is mounted on the chassis. The propulsion system is mounted on the chassis to drive a wheel. The steering system is coupled to the chassis. The steering system comprises a handlebar rotatatable to steer a wheel, and a speed bar pivotable to control the propulsion system.

A portable ice rink includes a wall formed of multiple wall members linearly disposed adjacent to one another to form a piecewise continuous wall that encloses a desired area, and also includes a chain of links disposed on the outside of the wall members for reinforcement. The rink may further include a waterproof tarp extending underneath the wall members and folded upwards along the outer side of the wall, with its edge tied to the change of links. The tarp can contain water which then freezes to form a skating surface. Curved wall members are provided to form a rink with round corners. Each wall member is a discrete unit, made of molded plastic, and having a hollow interior which can be filled with water (or other ballast). Each wall member is designed with stiffening features to maintain the flatness of its inner surface after filling.

A portable ice rink includes a wall formed of multiple wall members linearly disposed adjacent to one another to form a piecewise continuous wall that encloses a desired area, and also includes a chain of links disposed on the outside of the wall members for reinforcement. The rink may further include a waterproof tarp extending underneath the wall members and folded upwards along the outer side of the wall, with its edge tied to the change of links. The tarp can contain water which then freezes to form a skating surface. Curved wall members are provided to form a rink with round corners. Each wall member is a discrete unit, made of molded plastic, and having a hollow interior which can be filled with water (or other ballast). Each wall member is designed with stiffening features to maintain the flatness of its inner surface after filling.

A marker cone system which provides users with greater spatial awareness and guidance when using marker cones for sports training or other sports and/or non-sports related activities. The marker cone system generally includes a weight which may be installed underneath the marker cone and a post receiver which may be installed within the channel of a marker cone. The post receiver and weight will generally be connected together, such as by threaded engagement, with the marker cone being secured therebetween. A marker post may be removably inserted within the post receiver to improve visibility or provide additional functionality. The marker post may include a slot to reduce wind resistance and one or more receiver openings adapted to removably receive cross members. By utilizing multiple marker posts with post receivers, one may construct a hurdle, fence, goal, or any number of structures for sports or non-sports applications.

A line striper having a spray control system includes a spray gun, a lever, first and second cables, a manual actuator, and an assisted control. The lever is configured to move between a spray position and an inactive position. The first cable is mechanically linked to the lever. The manual control is mechanically linked to the first cable and configured to pull the first cable rearward to move the lever into the spray position. The second cable is mechanically linked to the lever. The assisted control is configured to pull the second cable rearward to move the lever into the spray position. The lever is independently moveable relative to the first and second cables such that movement of the lever caused by the first cable does not compress the second cable and movement of the lever caused by the second cable does not compress the first cable.