A ground marking autonomous robot containing a flexible bag containing a marking material therein, the flexible bag provided with an airtight valve outlet sealed to the flexible bag. The use of a ground marking autonomous robot with a flexible bag allows for improvements in the accuracy of the deposition of material, for example in image printing or fertiliser deposition. This allows the optimisation of material deposition, and material use, minimising environmental impact with no compromise to quality of finished product, e.g. a printed logo or a fertilised pitch.

A method and system for use in the game of football to determine ball placement and position, as well as first down demarcations, is described, with various embodiments configured to track the location of a football to determine its position on the field and to determine and display the first down demarcation on the field. Certain embodiments employ software to assist in performing placement determinations, distance determinations, track movement of the ball, first down markers, as well as light emitting modules along a track that extends parallel to the field.

Methods and apparatus are discussed for an electric powered personal transportation vehicle with electric motors powered by one or more batteries. A set of universal battery mounting hole locations and a reserved space for one or more battery housings exist on a board for the personal transportation vehicle. The reserved space on the board for the one or more battery housings that house one or more battery packs is set to not interfere with an operation of the motors or the wheels. A first battery pack containing the one or more batteries differs in at least one of i) a different amp-hour capacity, ii) a different length, width, or height, and iii) a different shape than another battery pack designed to be physically contained in the one or more battery housings and electrically connect with corresponding electrical connections in the one or more battery housings.

Provided is a method for marking a ground surface according to a predefined marking pattern using a system including a robot unit and a local base station including acts of providing two flag points, receiving global positioning data of the robot unit using a robot GNSS receiver, receiving global positioning data of the local base station using a base GNSS receiver, and establishing a local base station position using the received global positioning data of the local base station. A method wherein the predefined marking pattern is arranged relative to the two flag point positions and wherein the local base station position is a system reference point of the system. Also provided is a system for marking a ground surface according to a predefined marking pattern and the use thereof or parts thereof.

A real-time measurement and marking apparatus is provided. The disclosure providing a portable marking device comprising: a housing including a main housing structure and a can cover, the main housing structure having a front open end, a rear nozzle end, a top surface, a bottom surface, and a pair of opposing side walls, wherein at least one of the side walls defines an aperture, the can cover having a rear open end, a front closed end, the can cover extending at the rear open end to selectively engage with the aperture defined by at least one of the side walls releasably securing a spray can within the housing; a nozzle member positioned at the rear nozzle end of the of the main housing structure; an optical measuring apparatus for real-time measuring of a distance between a point of focus and the portable marking device activated by one or more buttons.

A taping device system for applying one or more boundaries to define a sporting court. In example embodiments, the court is a pickleball court. The taping device system can include a taping device, one or more spacer components, one or more corner markers, a desired length of guidance string and an applicator tool.

Provided is a water track marker (1) for marking a sports track, such as a water ski track, on a water surface (20). The water track marker comprises at least a first marker ejector (11) configured to eject marker projectiles (2) towards the water for creating an instant marking (3) on the water surface (20) upon impact with the water surface (20). Provided is also a method for marking a sports track and a towing boat comprising said water track marker.

A method of mounting at least one spray gun assembly onto an arm of a line striper includes installing a first clamp onto the arm with the first clamp being connected to a first spray gun assembly and the first clamp having an opening. The first clamp is installed onto the arm by placing the arm within the opening of the first clamp without sliding the first clamp onto an end of the arm. The method also includes securing the arm of the line striper within the opening of the first clamp.

A handheld sprayer (10) includes a fluid module (12′) mounted to a drive module (14′) at a static connection (16) and a dynamic connection (18′). The static connection (16) supportably attached the fluid module (12′) to the drive module (14). The dynamic connection (18′) connects a drive (84) of the drive module (14′) to a pump (24) of the fluid module (12) such that the drive (84) can power the pump (24) by the dynamic connection (18). The fluid contacting components of the handheld sprayer (10′) are in the fluid module (12′). The fluid module (12′) can be mounted to and dismounted from the drive module (14′) by a sliding motion.

A personal transport system is provided including, in an embodiment, an electrically powered vehicle, a companion remote control, and a companion mobile phone application. The vehicle includes an operator-supporting deck, one or more deck-mounted trucks, one or more axle-mounted wheels on each of the one or more trucks, one or more batteries, and a deck lighting system. The one or more batteries power a motor configured to drive the wheels by way of a pulley system, at least one battery of which is disposed under a battery enclosure. The battery enclosure has a first light indicator system, and the companion remote control has a second light indicator system, each of which is configured for communicating with the operator. The deck lighting system includes a light strip of light-emitting diodes disposed in a groove of the deck configured to change state to communicate with the operator or others sharing a road.