Abstract: A multi-axis waterjet cutting system is disclosed which eliminates high-pressure tubing coils in the area adjacent the waterjet system's cutting head and isolates critical system components from the backsplash of the cutting process. A high-pressure swivel is combined with an on/off valve arrangement in such a way that these components are closely adjacent the cutting head and rotate therewith, and are substantially shielded from waterjet back-splash. The cutting head and the swivel/valve combination are rotated about the cutting head's final axis of rotation (e.g., the A-axis) by a drive mechanism substantially shielded by the structure which rotates the cutting head associated with a prior axis of rotation (e.g., the C-axis). By eliminating high pressure tubing coils, the disclosed system reduces the clearance needed for manipulation of the cutting head around the workpiece.

Abstract: A shock attenuator capable for use with a high pressure fluid line at pressures experienced by waterjet cutting systems comprises an attenuator body having an internal generally axially-extending bore extending between end regions, at least one of which is open-ended. An end plug within the open-ended region of the bore seals the bore and has a though hole for accommodating a fitting for connection to a high pressure fluid line. A closure assembly for retaining the end plug within the bore includes a first plurality of generally radially-extending tabs extending from the attenuator body and circumferentially disposed about said axis, with each of said tabs of the first plurality being separated from the next tab by a respective gap. A second plurality of generally radially-extending tabs is coupled to the end plug and circumferentially disposed about said axis, with each of said tabs also being separated from the next tab by a respective gap.

Abstract: A shock attenuator capable for use with a high pressure fluid line at pressures experienced by waterjet cutting systems comprises an attenuator body having an internal generally axially-extending bore extending between end regions, at least one of which is open-ended. An end plug within the open-ended region of the bore seals the bore and has a though hole for accommodating a fitting for connection to a high pressure fluid line. A closure assembly for retaining the end plug within the bore includes a first plurality of generally radially-extending tabs extending from the attenuator body and circumferentially disposed about said axis, with each of said tabs of the first plurality being separated from the next tab by a respective gap. A second plurality of generally radially-extending tabs is coupled to the end plug and circumferentially disposed about said axis, with each of said tabs also being separated from the next tab by a respective gap.

Abstract: A variable-volume pump comprises one or more reciprocating pistons within respective reciprocating cylinders. The phase relationship between the reciprocating piston(s) and the reciprocating cylinder(s) determines the volumetric output of the pump.

Abstract: A variable-volume pump comprises one or more reciprocating pistons within respective reciprocating cylinders. The phase relationship between the reciprocating piston(s) and the reciprocating cylinder(s) determines the volumetric output of the pump.

Abstract: A method and apparatus is disclosed for permitting the passage of conduits through the hull of a boat without the creation of additional holes. A conduit-accommodating passageway is defined through the boat's scupper which bypasses the check valve that is associated with the scupper to prevent backflow. An annular body having a radially-extending conduit-accommodating passage communicating between its O.D. and its I.D. is positioned with respect to the scupper so that the fluid passing through the scupper and check valve passes through the generally annular body's I.D. while conduit passing through the radially-extending passage passes through the scupper but bypasses the check valve.

Abstract: A method and apparatus is disclosed for permitting the passage of conduits through the hull of a boat without the creation of additional holes. Briefly, a conduit-accommodating passageway is defined through the boat's scupper which bypasses the check valve that is associated with the scupper to prevent backflow. An annular body having a radially-extending conduit-accommodating passage communicating between its O.D. and its I.D. is positioned with respect to the scupper so that the fluid passing through the scupper and check valve passes through the generally annular body's ID while conduit passing through the radially-extending passage passes through the scupper but bypasses the check valve.