Diverter valve

Claim 1

A diverter valve for pneumatic conveying systems comprising: (a) first and second plates interconnected for relative movement therebetween, and having first and second ports respectively therethrough; said first and second ports having an aligned position for conveying materials therethrough, and a non-aligned position for diverting material flow; (b) means for moving one of said first and second plates with respect to the other for selectively positioning said ports in the aligned and non-aligned positions; (c) a seal ring positioned between said first and second ports, and slidably mounted in said second plate for axial translation therein; said seal ring having inner and outer marginal surfaces, and first and second end faces associated with said first and second plates respectively; (d) means resiliently urging said seal ring toward said first plate, whereby the first end face of said seal ring abuttingly engages the first plate and forms a seal about said first port; (e) means forming a seal between the outer marginal surface of said seal ring and the second plate; wherein (f) said second plate includes an inward surface having an annularly shaped groove therein positioned adjacent to and concentric with said second port, and receiving said seal ring therein; said groove being defined by a bottom, and radially inward and outward side walls; (g) means sealing the inner marginal surface of said ring and the inward side wall of said groove; (h) said seal ring inner and outer marginal surfaces each have a circumferential groove therein; and (i) inner and outer resilient seal rings mounted in the groove of said ring inner and outer surface respectively, each of said inner and outer resilient seal rings having a free edge sealingly engaging the inner and outer side wall respectively of the groove in the second plate.