Piece part washer

Claim 1

In an industrial piece-part washer of the type having a plurality of upstanding hollow riser pipes, each said riser pipe having two ends, each said riser pipe communicating with a supply header, and riser pipes and said supply headers defining a flow path for a selected wash fluid, said riser pipes having nozzles disposed therealong to direct said wash fluid from the interior of said riser pipe to contact an article to be washed, the improvement comprising: a pair of said supply headers arranged in overhead horizontal parallel spaced relationship; forming each said riser pipe as a single, uninterrupted run of piping; joining a plurality of said riser pipes to depend from each said supply header, forming parallel ranks of riser pipes, each said riser pipe having two bends formed therealong, a first riser segment extending from the first of said ends to the first of said bends, a second riser segment extending from the first of said bends to the second of said bends, a third riser segment extending from the second of said bends to the second of said ends, each said riser pipe joined to one said supply header at the first of said ends, forming a straight run of pipe from said supply header to the first of said bends, said bends formed to disposed said second riser segment in a vertical orientation when said riser pipes are joined to said supply headers, said riser pipes in one said rank extending toward said riser pipes in the remaining said rank, said first riser segment and said third riser segment of each said riser pipe angled toward said second riser segment with the angle between said first and second second riser segments and said second and third riser segments, respectively, being greater than 90°; and an end cap non threadably attachable to the second end of each said riser pipe to at least partially impede the flow of wash fluid through said riser pipe and allow said wash fluid to be directed to said nozzles.