Three-unit assembly for pneumatic circuit

A three-unit assembly for a pneumatic circuit, comprising:

• a filter including an inlet port and an outlet port;
• a regulator including an inlet port and an outlet port;
• a lubricator including an inlet port and an outlet port;
• each of said filter, regulator and lubricator including a portion for defining an air passage between said inlet port and said outlet port thereof, respectively, each air passage defining portion including a pair of projections extending oppositely from each other adjacent its respective inlet and outlet ports, all of said projections being V-shaped and substantially the same size;
• coupling members provided between adjacent ones of the filter, regulator and lubricator, each said coupling member defining an air passage for alignment between the outlet port of one of the filter, regulator and lubricator and the inlet port of the next adjacent one of the filter, regulator and lubricator, each said coupling member further including a pair of threaded bores extending generally transversly of the axis of its said air passage, the threaded bores opening generally in opposite directions;
• striding members for engaging the projections of adjacent ones of the filter, regulator and lubricator, each said striding member including a pair of leg portions, each said leg portion having a V-shaped region complementarily configured to the V-shaped regions of the projections and adjacent ones of the filter, regulator and lubricator, each said striding member further including a center portion for joining the two leg portions, each said center portion including means defining a hole for alignment with a respective one of said threaded bores of a respective one of said coupling members when adjacent ones of the filter, regulator and lubricator are assembled with the respective coupling member between them, an O-ring between the respective coupling members and the adjacent ones of the filter, regulator and lubricator, and said striding members being positioned on at least two sides of the assembly with the V-shaped regions of the striding members engaging respective V-shaped regions of the projections on the adjacent ones of the filter, regulator and lubricator and bolts capturing the respective striding member center portions and engaging with a respective one of said threaded bores in the coupling members, the V-shaped regions of each one of said striding members being inclined away from each other so that the adjacent ones of the filter, regulator and lubricator are pulled together to compress the O-rings and seal the air passages as the bolts are tightened.