Abstract: A waste disposal apparatus has a cutter apparatus with angled teeth. The cutters may be disposed in a passage of a housing having an inlet and an outlet. The cutter apparatus has a stationary cutter and a pivoting cutter which pivots with respect to the stationary cutter. The stationary cutter has a plurality of teeth intermeshing with a plurality of teeth on the secondary cutter as the secondary cutter pivots. The teeth of the stationary and pivoting cutters have edges that extend towards one another at an angle with respect to a traverse direction perpendicular to a longitudinal axis such that the teeth meet at an angle. Each edge has a leading edge which meets first to concentrate cutting force at a point along the edge. The force moves along the edge from the leading edge to a trailing edge. A drive means rotates the pivoting cutter. The waste disposal apparatus may be a water powered waste disposal apparatus.

Abstract: A waste disposal apparatus has cutter guides. The disposal apparatus has a plurality of cutters disposed in a passageway for comminuting waste. An annular ridge is formed in the wall of the passageway opposite an outer end or peripheral edge of the cutter In water powered waste disposal apparatus, a reciprocating piston is driven by pressurized water in an annular chamber. The piston is coupled to at least one rotatable cutter. The valve has a reciprocating control piston for selectively diverting the pressurized water into the annular chamber on alternate sides of the drive piston.

Abstract: A water powered waste disposal apparatus has an adjustable valve with adjustable operating pressure requirements. The disposal apparatus has a plurality of cutters disposed in a passageway for cutting waste. A reciprocating piston is driven by pressurized water in an annular chamber. The piston is coupled to at least one rotatable cutter. The valve has a reciprocating control piston for selectively diverting the pressurized water into the annular chamber on alternate sides of the drive piston. A reciprocating pilot piston selectively conveys the pressurized water to alternate sides of the control piston in response to water pressure in the annular chamber. A detent and spring apply an amount of resistance to the pilot piston such that water pressure in the annular chamber must reach a certain threshold pressure to overcome the resistance of the detent and spring.

Abstract: A water powered waste disposal apparatus has an improved valve with floating seals and water passages. The disposal apparatus has a plurality of cutters disposed in a passageway for cutting waste. A reciprocating piston is driven by pressurized water in an annular chamber. The piston is coupled to at least one rotatable cutter. The valve has a reciprocating control piston for selectively diverting the pressurized water into the annular chamber on alternate sides of the drive piston. The floating seals have slots formed therethrough for allowing the seals to expand and prevent water from leaking past the control piston and preserving pressure. A reciprocating pilot piston selectively conveys the pressurized water to alternate sides of the control piston in response to water pressure in the annular chamber. Water passages are formed at the ends of the control piston to allow the water to act on the control piston.