Precision casting with variable angled vanes

Claim 2

In the method of producing ring structures formed of a ring member with a plurality of vanes of the same design extending radially in circumferentially spaced apart relation from the ring member, with some of the vanes extending at an angle of rotation with reference to their radial axes normal to the ring axis which differs from others of the vanes, in which an integral pattern of the ring member and radially extending vanes is formed of heat disposable material for use in producing an integral casting by precision casting technique, the steps of providing separate heat disposable patterns of the vanes with locating projections extending from the ends thereof, providing separate ring forming segments of heat disposable material having sockets shaped to correspond with the locating projections on the ends of the vanes for receiving the locating projections therein in fitting relation for assembly of the vane patterns with the segments and in which the segments are formed with end walls shaped to interfit one with another for assembly into a composite ring structure, in which in order to assemble the patterns with vanes extending at an angle of rotation with reference to their radial axes which differ from others of the vanes in the assembled ring structure, each of the vanes are the same and each of the segments are the same except for the sockets which form one segment to another different in their angle of rotation with reference to the radial axis, assembling said vanes with the segments having the sockets differing in angles of rotation corresponding to the desired differences in angle of rotation of the assembled vanes in the ring structure, and joining the ring segments with the assembled vanes into the ring structure.

Claim 3

In the method of producing ring structures formed of a ring member with a plurality of vanes of the same design extending radially in circumferentially spaced apart relation from the ring member, with some of the vanes extending at an angle of rotation with reference to their radial axes normal to the ring axis which differs from others of the vAnes, in which an integral pattern of the ring member and radially extending vanes is formed of heat disposable material for use in producing an integral casting by precision casting technique, the steps of providing separate heat disposable patterns of the vanes with locating projections extending from the ends thereof, providing separate ring forming segments of heat disposable material having sockets shaped to correspond with the locating projections on the ends of the vanes for receiving the locating projections therein in fitting relation for assembly of the vane patterns with the segments, and in which the segments are formed with end walls shaped to interfit one with another for assembly into a composite ring structure, in which in order to assemble the pattern with the vanes extending at angles of rotation with reference to their radial axes which differ from others of the vanes in the assembled ring structure, each of the segments are the same with sockets having the same angle of rotation and each of the vanes are the same except for the projections which form one vane to another different in their angle of rotation with respect to the radial axes, assembling the segments with the vanes having the projections with differences in angles of rotation corresponding to the desired differences in angle of rotation of the assembled vanes in the ring structure, and joining the ring segments with the assembled vanes into the ring structure.

Claim 4

In the method of producing ring structures formed of a ring member with a plurality of vanes of the same design extending radially in circumferentially spaced apart relation from the ring member, with some of the vanes extending at an angle of rotation with reference to their radial axes normal to the ring axis which differs from others of the vAnes, in which an integral pattern of the ring member and radially extending vanes is formed of heat disposable material for use in producing an integral casting by precision casting technique, the steps of providing separate heat disposable patterns of the vanes with locating projections extending from the ends thereof, providing separate ring forming segments of heat disposable material having sockets shaped to correspond with the locating projections on the ends of the vanes for receiving the locating projections therein in fitting relation for assembly of the vane patterns with the segments, and in which the segments are formed with end walls shaped to interfit one with another for assembly into a composite ring structure, in which in order to assemble the pattern with the vanes extending at angles of rotation with reference to their radial axes which differ from others of the vanes in the assembled ring structure, each of the segments are the same with sockets having the same angle of rotation and each of the vanes are the same except for the projections which form one vane to another different in their angle of rotation with respect to the radial axes, assembling the segments with the vanes having the projections with differences in angles of rotation corresponding to the desired differences in angle of rotation of the assembled vanes in the ring structure, and joining the ring segments with the assembled vanes into the ring structure.

Claim 5

The method as claimed in claim 1 which includes the step of forming a mold shell about the pattern assembly, removing the heat disposable material to leave a shell mold having an integral mold cavity of a ring structure with radially extending vanes which differ in angular rotation, and casting molten metal into the shell mold to fill the mold cavity and then removing the metal casting from the mold.