US Patent 8146843 Waste food disposal unit

A waste food disposer unit 10 for under sink application has a housing divided into a grinding chamber 12 and a motor chamber 15. The grinding chamber 12 has an inlet 16 for water and waste matter and an outlet 18 for water and shredded waste matter. A shredder ring 20 is disposed within the grinding chamber and has a plurality of cutting teeth 36 formed by slots 34 extending upwardly from a lower edge of the ring. A grinding disc 22 is disposed within the grinding chamber 12 and has a plurality of peripheral recesses 42 which co-acts with the cutting teeth 36 to shred the waste matter.