A method for marking artificial turf mats that allows for the obtaining of artificial turf mats with indelible motifs on any of the surfaces of said mats, comprising positioning means for at least one mat and marking means applicable onto at least one surface of said mat, so that said marking means are capable of producing at least one motif onto the surface of said mat.

A system for providing player training including a grid of individually powered, processor controlled and communicable lighting elements and sensors which are embedded within a playing surface associated with the event, the lighting elements interfacing with at least one of a player worn sensor and/or a remote processor device for providing a visual illustration of any number of parameters associated with an actual player performance, including real time motion progressions of the player which are represented on the field surface and/or recreated on a processor driven screen which films or otherwise tracks the event. The simulated progressions can further replicate the desired motions of the positional player's intended motions or those of an opposing positional player and in lieu of the actual player being on the playing surface.

A safety surface with an engineered shock-absorbing base. The base may include one or more engineered resilient mats. The mats may be fabricated of repurposed tire rubber. The mats may be adjoined edgewise. Adjoined mats may be coupled together. The base may overlay a surface. The base may include upward-facing pockets. Interiors of the pockets may receive loose fill. An upper layer may cover the base. The upper layer may bond to the base. The upper layer may seal the loose fill within the safety surface. The upper layer may include poured-in-place surfacing. The upper layer may be textured. The upper layer may include synthetic turf. Impact upon the upper layer may be attenuated by flexion of the base. Mats may be coupled without hardware fasteners. Exterior surfaces of pockets of one mat may be nested into complementarily contoured features of an adjoining mat.

A safety surface with an engineered shock-absorbing base. The base may include one or more engineered resilient mats. The mats may be fabricated of repurposed tire rubber. The mats may be adjoined edgewise. Adjoined mats may be coupled together. The base may overlay a surface. The base may include upward-facing pockets. Interiors of the pockets may receive loose fill. An upper layer may cover the base. The upper layer may bond to the base. The upper layer may seal the loose fill within the safety surface. The upper layer may include poured-in-place surfacing. The upper layer may be textured. The upper layer may include synthetic turf. Impact upon the upper layer may be attenuated by flexion of the base. Mats may be coupled without hardware fasteners. Exterior surfaces of pockets of one mat may be nested into complementarily contoured features of an adjoining mat.

A reconfigurable device comprises flexible bladder that encloses a jammable material. The geometry of the device can be altered by unjamming the jammable material (making it flexible), changing the shape of the device while it is flexible, and then jamming the jammable material (making it rigid). In some applications of this invention, a joint connects rigid arms. The ends of the rigid arms are enclosed in the bladder. By varying the stiffness of the jammable material in the bladder, the stiffness of the joint can be controlled.

A reconfigurable device comprises flexible bladder that encloses a jammable material. The geometry of the device can be altered by unjamming the jammable material (making it flexible), changing the shape of the device while it is flexible, and then jamming the jammable material (making it rigid). In some applications of this invention, a joint connects rigid arms. The ends of the rigid arms are enclosed in the bladder. By varying the stiffness of the jammable material in the bladder, the stiffness of the joint can be controlled.

A marking apparatus including: a plurality of connectable pieces, wherein each connectable piece includes at least one of protruding portions or recessed portions, wherein a shape of the protruding portions is substantially similar to a shape of the recessed portions, such that the protruding portions of a first connectable piece are insertable into the recessed portions of a second connectable piece to form an interlocking connection between the first and second connectable pieces.

The invention concerns a mat system comprising a plurality of individual mats, each with a top side, a bottom side, and at least one rectilinear side edge. The rectilinear side edges each have at least one undercut recess, corresponding to connecting means which enable, by engagement of each one of their halves in an undercut recess, a connecting of two mats along their rectilinear side edges. The individual mats and the connecting means each comprise at least one layer of foam material. In order to equal out even large tolerances in the orienting of the individual mats to each other, the connecting means each comprise two interconnected circular segment regions with a radius R, R′, wherein for the spacing A of the centre points of the circular segment regions the following relation applies: (I) 0.8*(R+R′)<A<1.3*(R+R′).

The invention concerns a mat system comprising a plurality of individual mats, each with a top side, a bottom side, and at least one rectilinear side edge. The rectilinear side edges each have at least one undercut recess, corresponding to connecting means which enable, by engagement of each one of their halves in an undercut recess, a connecting of two mats along their rectilinear side edges. The individual mats and the connecting means each comprise at least one layer of foam material. In order to equal out even large tolerances in the orienting of the individual mats to each other, the connecting means each comprise two interconnected circular segment regions with a radius R, R′, wherein for the spacing A of the centre points of the circular segment regions the following relation applies: (I) 0.8*(R+R′)<A<1.3*(R+R′).

A grass ski carpet, comprising a plurality of spiral grass assemblies arranged regularly, wherein each spiral grass assembly comprises: a plurality of row brushes arranged in a same direction, wherein each row brush comprises a base bar and multiple pieces of spiral grass, the multiple pieces of spiral grass are spaced apart and fixedly connected to a first surface of the base bar, the multiple pieces of spiral grass are arranged in a same direction, each of the multiple pieces of spiral grass has a grass tip, a grass stem, and a grass root, the grass stem is curved, the grass tip is bulbous, and rotation directions of all the multiple pieces of spiral grass are same; and a base plate fixedly connected to each of the multiple row brushes through a detachable structure, so that the multiple row brushes are arranged on a surface of the base plate.