Abstract: A fish pump is described for pumping live fish in water from one location to another. The pump is designed specifically for pumping live fish without injuring the fish. Of special significance is the pump rotor. It includes symmetrical helical-spiral passages that lead from a single open axial intake to peripheral open outlets at an enlarged rotor discharge end. The passages are open only at the intake and outlets and are smoothly curved to prevent damage to the fish. The passages and all other areas through which the fish pass are of cross-sectional dimension that is at least equal to one half the length of the longest fish to be pumped. Furthermore, the pitch of the helical-spiral passageways varies from the rotor opening to the outlet to influence the pumping efficiency without endangering the fish. The rotor, when in operation, produces a vortex at its intake end that tends to align the fish with the axis of rotation of the pump rotor.

Abstract: A tool is described that enables the sectioning of the rib bones of vertebrate fish into shortened ingestible sections. The tool includes a plurality of spaced circular saw blades that are mounted to an elongated arbor. The arbor is rotatably carried on a handle supported frame and is powered to rotate by an electric motor. Spacer discs are situated between the adjacent saw blades to determine the lateral distance between adjacent cuts. Elongated spring members are located between adjacent saw blades and are sprung away from the spaced discs. The spring members are utilized to prevent the flesh from binding between adjacent blades during operation of the tool. The spacer discs also function to control the depth of the cut for the multiple saw blades so that only a minimal portion of the flesh is cut along with the rib bones.