04135542 is referenced by 31 patents and cites 10 patents.

A drain device that removes oil, water, sludge and other contaminants from compressed air systems comprising a cylindrical housing for attachment between diametrically opposed compressed air and drain lines, a cylindrical rotor rotatably journalled within the housing, a single port, at least as large as the inside diameter of the air line, through the wall of the rotor, the port being positioned for sequential alignment with the air and drain lines, when the rotor is actuated and a pair of bleeder valves between the interior chamber of the rotor and the atmosphere including respective cam tracks positioned on end walls of the rotor and housing to open the valves when the rotor port is aligned with the discharge line.

Title
Drain device for compressed air lines
Application Number
5/832591
Publication Number
4135542
Application Date
September 12, 1977
Publication Date
January 23, 1979
Inventor
James R Chisholm
771 Coral Dr., Cape Coral, 33904
FL, US
Agent
O Brien Clarence A
Agent
Harvey B Jacobson
IPC
F16K 24/04
F16T 1/45
B01D 53/04
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