Abstract: An apparatus and method for removal of contaminants from vented vapors having a pressure indicator/stop assembly.

Abstract: An auxiliary device for marking marks on a surface of a field playing surface. The device includes a frame attachable to a field line marking machine that includes a paint supply. A guide system having a length dimension is carried by the frame member. The guide system is oriented horizontally. A field paint coating apparatus is carried within the guide system carried by the frame member for movement over a fixed distance along the guide system. The field paint coating apparatus is connected to the paint supply carried by the field line marking machine and serves to paint marks accurately, precisely and reproducibly on a field playing surface.

Abstract: A pneumatically operated spray gun for dispensing fluid materials, and having a disposable supply hose for eliminating dean up problems common when using more expensive hoses and fittings. As a result, the spray gun is easy to dean and maintain since no spray material is introduced through internal parts of the spray gun. such as valves, passages, and inlet and outlet ports. The spray gun includes a gun housing having an air inlet port, an air outlet port, and a spring biased air valve disposed between the inlet and the outlet ports. The air valve is biased in a closed position. A trigger is pivotally attached to the gun housing and engages the air valve. The trigger is also attached to one end of a spring biased pinch valve mounted in the housing. Another end of the pinch valve is biased against one end of a material disposable supply hose for pinching off the supply of material therethrough. An end of the disposable supply hose is attached to the housing and disposed adjacent an end of the air outlet port.