A sprinkler housing assembly that defines a subterranean compartment to house the sprinkler head body, keeping it free from dirt and debris, yet safely below ground. The housing assembly has a peripherally sealed access opening through which an upper portion of the sprinkler head protrudes, thereby enabling the head to move between its inactive contracted position and its active extended position for watering the lawn. In the inactive contracted position, a user of the present invention may access the body of the sprinkler head in the enclosed compartment, to replace the entire sprinkler head, via an upper opening of the housing assembly, wherein the upper opening is adjacent or just downward to the groundlines. As a result, without digging and with only a screwdriver, the user may remove the entire sprinkler without ruining the lawn.

A coating system includes a first robot configured to open an opening/closing portion of a vehicle body and a second robot configured to coat an interior of the vehicle body through the opening/closing portion opened by the first robot. The first robot has a first base via which the first robot is mounted to a structure forming a coating area. The second robot has a second base via which the second robot is mounted. The second base is mounted below the first base in a vertical direction.

An irrigation sprinkler can be provided with a flow guard feature configured to send an indicator stream into the air when a nozzle is missing, while still conserving most of the water that would have been wasted without the flow guard feature. The flow guard feature can include a valve assembly having a first port and a second off-axis port. The second port can be smaller than the first port. The second port can be non-parallel to the first port. The first port can be open when the nozzle is present and be sealed when the nozzle is missing. The second, off-axis port can be open even when the nozzle is missing to provide the indicator stream.

An irrigation sprinkler can be provided with a flow guard feature configured to send an indicator stream into the air when a nozzle is missing, while still conserving most of the water that would have been wasted without the flow guard feature. The flow guard feature can include a valve assembly having a first port and a second off-axis port. The second port can be smaller than the first port. The second port can be non-parallel to the first port. The first port can be open when the nozzle is present and be sealed when the nozzle is missing. The second, off-axis port can be open even when the nozzle is missing to provide the indicator stream.

A boom for an agricultural machine includes a first, second and third boom sections. The first boom section is connectable to a vehicle, and can support fluid delivery components. The second boom section operably connected to and is foldable with respect to the first boom section about a fold axis. The second boom section is further coupled to move with respect to the first boom other than about the fold axis from an extended position in response to an external force, and to return to the first extended position upon removal of the external force. The third boom section is operably connected to the second boom and having at least in an extended position. The third boom section is operably connected to move with respect to the second boom in response to a second external force, and operably connected to return to the extended position upon removal of the second external force.

A boom for an agricultural machine includes a first, second and third boom sections. The first boom section is connectable to a vehicle, and can support fluid delivery components. The second boom section operably connected to and is foldable with respect to the first boom section about a fold axis. The second boom section is further coupled to move with respect to the first boom other than about the fold axis from an extended position in response to an external force, and to return to the first extended position upon removal of the external force. The third boom section is operably connected to the second boom and having at least in an extended position. The third boom section is operably connected to move with respect to the second boom in response to a second external force, and operably connected to return to the extended position upon removal of the second external force.

The present invention is directed to a pressure washer having a main housing and a roll cage surrounding the main housing for protection. The roll cage is generally rectangular and provides flat surfaces to make it easier to store the unit, and importantly provides a flat top surface to allow other items to stack on top of the unit. The main housing also includes a storage compartment to store accessories, including a trigger gun. The trigger gun includes a trigger guard with openings to store additional nozzles for the gun.

The present invention is directed to a pressure washer having a main housing and a roll cage surrounding the main housing for protection. The roll cage is generally rectangular and provides flat surfaces to make it easier to store the unit, and importantly provides a flat top surface to allow other items to stack on top of the unit. The main housing also includes a storage compartment to store accessories, including a trigger gun. The trigger gun includes a trigger guard with openings to store additional nozzles for the gun.

A wastewater spray distribution apparatus is operative to distribute wastewater produced by a sewage treatment system (10) onto a ground level (22) through operation of sprayers (118, 260). The exemplary sprayers include a manifold (142, 262) that includes outlet nozzles (158, 264) that can be readily removed and replaced. The exemplary manifold further includes interior areas bounded by surfaces that slope continuously downward from the outlet nozzles to the manifold inlet to assure the draining of water therefrom. Each of the nozzles include a base (140) which includes brake (207). A brake is provided in each nozzle and is adjustable to provide brake force to limit rotational movement produced by the thrust of water passing from the outlet nozzles to assure that the sprayer operates at the appropriate rotational speed. Alternative arrangements include manifolds including fixed or adjustable flaps and radially outwardly adjustable arms to adjust rotational properties.

A nebulizer has an aperture plate, a mounting, an actuator, and an aperture plate drive circuit (2-4). A controller measures an electrical drive parameter at each of a plurality of measuring points, each measuring point having a drive frequency; and based on the values of the parameter at the measuring points makes a determination of optimum drive frequency and also an end-of-dose prediction. The controller performs a short scan at regular sub-second intervals at which drive current is measured at two measuring points with different drive frequencies. According to drive parameter measurements at these points the controller determines if a full scan sweeping across a larger number of measuring points should be performed. The full scan provides the optimum drive frequency for the device and also an end of dose indication.