Abstract: A hubcap comprising a base and a cap rotatably coupled to the base.

Abstract: A hubcap and rotary union, the hubcap having the outer face forming a smooth-bore at the center of the face, and a rotary union body having a smooth lug, the smooth lug being rotatably disposed in the bore.

Abstract: A rotary union is configured for removable disposition into the central bore of a hubcap through an orifice in the outboard face of the hubcap. The hubcap includes a fluid channel extending from the central bore to the exterior of the hubcap. The rotary union includes a port through which fluid may flow into the fluid channel when the rotary union is disposed in the central bore.

Abstract: A visual flow indicator provided on a tire inflation system air hose or rotary union housing.

Abstract: A front-mounted clamshell scoop or shovel arrangement mounts onto the snowplow mounting bracket of the frame of a snowplow assembly when the blade has been removed. The scoop can be closed and lowered to scoop and pick up work-site debris or other materials, raised so the materials can be transported to a collection site, and the jaw portion is rocked to an open position to allow the material to drop from the clamshell scoop. In controls for the snowplow assembly serve to raise and lower the scoop and to open and close it.

Abstract: A front-mounted clamshell scoop or shovel arrangement mounts onto the snowplow mounting bracket of the frame of a snowplow assembly when the blade has been removed. The scoop can be closed and lowered to scoop and pick up work-site debris or other materials, raised so the materials can be transported to a collection site, and the jaw portion is rocked to an open position to allow the material to drop from the clamshell scoop. In controls for the snowplow assembly serve to raise and lower the scoop and to open and close it.

Abstract: A waste water filter apparatus includes a filter vessel, a filter, and a pump. The filter vessel acts as a buffer in which waste water enters at the bottom and exits at the top. While the water is in the filter vessel, it is pumped from the bottom by the pump through the filter and back to the top of the filter vessel. According to a preferred embodiment, the waste water is filtered as many as six times before it exits the filter vessel. Should the pump fail, the flow of water through the filter vessel is not impeded in any way. During backwash, water is pumped through the filter in the reverse direction and into the filter vessel above the bottom of the filter vessel and exits the filter vessel below the top. This results in the capture of backwashed filter media in the filter vessel where it will be returned to the filter when the filter mode is next activated. The backwash water exits the filter vessel below the clean water exit into a sludge holding tank.

Abstract: A filtration apparatus includes a tank having an upper chamber and a lower baffle, layers of stone and carbon between the upper chamber and the lower baffle, a water inlet to the upper chamber, and a water outlet below the lower baffle. The upper chamber is divided by a first baffle which separates the chamber into two parts, a first part in direct communication with said water inlet and a second part in direct communication with said backwash outlet. An air manifold coupled to an air pump is placed between the lower baffle and the upper chamber. During backwash, air is mixed with water to cause a turbulent flow. A further baffle is provided between the first baffle and the backwash outlet which provides a more uniform removal of contaminants from the tank.