Overhead brush support and counterweight

A counterweight system for a car wash brush having a horizontal axis of rotation comprising:

• a pair of spaced apart, parallel brush support arms having free ends and being mounted for pivotal movement about a first axis;
• a brush mounted for rotation between the free ends of the brush support arms to define a swept volume;
• a pair of spaced apart, parallel counterweight support arms having free ends and being mounted in adjacent relationship with the brush support arms for pivotal movement about a second axis;
• a counterweight connected commonly to and extending between the free ends of the counterweight support arms, the counterweight passing inside the swept volume when the brush support and counterweight support arms are substantially parallel;
• and
• a mechanical linkage interconnecting the brush support arms and the counterweight support arms to cause the arms to move synchronously and in opposite directions.

A counterweighted pivotal arm system for a rotating vehicle brush extending across a wash lane comprising:

• a pair of vertical supports disposed on opposite sides of the wash lane;
• brush support pivotally mounted to the vertical supports and defining a first pivot axis, the brush being rotatable about an axis of rotation which is parallel to the first pivot axis;
• a counterweight extending across the wash lane;
• counterweight support means pivotally mounted to the vertical supports defining a second pivot axis which is parallel to the first pivot axis, and further having free ends;
• the counterweight being mounted commonly to and extending between the free ends of the counterweight support means;
• means for interconnecting the brush support means and the counterweight support means so that they pivot in opposite directions relative to one another.

A car wash brush assembly comprising:

• a pair of supports proximate and on opposite sides of a wash lane;
• a pair of brush support arms pivotally connected to respective supports for synchronous parallel rotation about a first pivot axis;
• a rotary brush mounted to and extending between the free ends of said brush support arms;
• a pair of counterweight support arms pivotally connected to supports for synchronous parallel rotation about a second pivot axis in adjacent but spaced parallel relation to said first pivot axis;
• any elongate counterweight mounted to and extending between the free ends of said counterweight support arms adjacent but clear of the swept volume of said rotary brush;
• and
• means for mechanically interconnecting the brush support arms with the counterweight support arms to cause the arms to swing in opposite directions from one another when in operation.