US3978766A — Apparatus and method for machining continuous mix…

Claim 1

Independent Claim 199 words

A turning machine for machining a desired profile into a workpiece, said machine including a rotatable member rotatable about a first axis, and to which a workpiece is normally secured for rotation of the workpiece about said axis; an attachment secured to the rotatable member for supporting a workpiece thereon eccentrically relative to said axis, said attachment comprising a base plate coaxially attached to the rotatable member for rotation therewith; a rotary table attached to the base plate in predetermined, radially offset position relative to the axis of rotation of the base plate, and rotatable about a second axis parallel to and spaced from the axis of the rotatable member; means securing a workpiece to be machined coaxially on the rotary table for rotation therewith; motor means connected with the table to rotate the table relative to the base plate simultaneously with rotation of the rotatable member, to thereby obtain orbital movement of the workpiece about the axis of rotation of the rotatable member; and a cutting tool carried by the machine for movement parallel to the axis of rotation of the workpiece, simultaneously with the orbital movement of the workpiece, to machine a desired profile in the workpiece.

Claim 2

Dependent Claim 199 words

A turning machine for machining a desired profile into a workpiece, said machine including a rotatable member rotatable about a first axis, and to which a workpiece is normally secured for rotation of the workpiece about said axis; an attachment secured to the rotatable member for supporting a workpiece thereon eccentrically relative to said axis, said attachment comprising a base plate coaxially attached to the rotatable member for rotation therewith; a rotary table attached to the base plate in predetermined, radially offset position relative to the axis of rotation of the base plate, and rotatable about a second axis parallel to and spaced from the axis of the rotatable member; means securing a workpiece to be machined coaxially on the rotary table for rotation therewith; motor means connected with the table to rotate the table relative to the base plate simultaneously with rotation of the rotatable member, to thereby obtain orbital movement of the workpiece about the axis of rotation of the rotatable member; and a cutting tool carried by the machine for movement parallel to the axis of rotation of the workpiece, simultaneously with the orbital movement of the workpiece, to machine a desired profile in the workpiece.

Claim 3

Dependent Claim 32 words

A machine as in claim 1, wherein change speed gear means is connected between the motor means and the rotary indexing table to change the speed of rotation of the indexing table.

Claim 4

Dependent Claim 30 words

A machine as in claim 1, wherein a spacer block is secured on top of the rotary indexing table and the workpiece is secured on top of the spacer block.

Claim 5

Dependent Claim 98 words

A machine as in claim 1, wherein the base plate is substantially disc-shaped and is secured to a rotary table of a vertical boring mill, change speed gear means supported on the base plate and connected between the motor means and rotary indexing table to change the speed of rotation of the indexing table, a spacer block secured on top of the rotary indexing table, said workpiece being secured on top of the spacer block, and slip ring means on the table of the vertical boring mill for transferring electrical power from a source to the motor means.

Claim 6

Dependent Claim 79 words

A machine as in claim 4, wherein a reverse switch means is carried by the base plate and is connected with the motor means for reversing the direction of rotation of the motor means, and said change speed gear means includes a pair of gear reduction units connected through right angle gear drive means between the motor means and rotary indexing table and one of said gear reduction units has means enabling the gear ratio therein to be changed.

Claim 7

Independent Claim 219 words

The method of machining a desired profile into a self-wiping, corotating, continuous mixer agitator, having opposite, convex, curved flanks, and opposite crests, comprising the steps of determining the size of the crests desired and determining the radius of curvature desired for the flanks, measuring the offset of the center for the radius of curvature of the flanks from the center of the agitator, providing an attachment for a vertical boring mill or lathe and the like, wherein the attachment includes a rotary indexing table, supporting the agitator to be machined on the rotary indexing table, positioning the center of the rotary indexing table a distance from the center of the vertical boring mill or lathe and the like a distance equal to the aforesaid offset, setting the rotary indexing table to a predetermined first setting to machine at least one flank of the agitator, and energizing the vertical boring mill or lathe and the like and substantially simultaneously therewith energizing the rotary indexing table to effect rotation of the rotary indexing table about its axis and also to effect rotation of the vertical boring mill or lathe and the like to thus obtain orbital motion of the agitator and movement of the agitator relative to a cutting tool to machine at least one flank of the desired profile therein.

Claim 8

Independent Claim 219 words

The method of machining a desired profile into a self-wiping, corotating, continuous mixer agitator, having opposite, convex, curved flanks, and opposite crests, comprising the steps of determining the size of the crests desired and determining the radius of curvature desired for the flanks, measuring the offset of the center for the radius of curvature of the flanks from the center of the agitator, providing an attachment for a vertical boring mill or lathe and the like, wherein the attachment includes a rotary indexing table, supporting the agitator to be machined on the rotary indexing table, positioning the center of the rotary indexing table a distance from the center of the vertical boring mill or lathe and the like a distance equal to the aforesaid offset, setting the rotary indexing table to a predetermined first setting to machine at least one flank of the agitator, and energizing the vertical boring mill or lathe and the like and substantially simultaneously therewith energizing the rotary indexing table to effect rotation of the rotary indexing table about its axis and also to effect rotation of the vertical boring mill or lathe and the like to thus obtain orbital motion of the agitator and movement of the agitator relative to a cutting tool to machine at least one flank of the desired profile therein.

Claim 9

Dependent Claim 28 words

A method as in claim 6, including the step of setting the rotary indexing table 180° from the first setting to machine the other flank of the agitator.

Claim 10

Dependent Claim 81 words

A method as in claim 7, including the steps of giving each flank two radii of curvature, and wherein a line drawn from the center of the agitator outwardly past one edge of the crest subtends an angle α, and setting the rotary indexing table at said first setting plus the angle α for machining half of the flank, and setting the rotary indexing table at said first setting minus the angle α for machining the other half of the flank.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1979-09-07	1980-03-08	1980-09-07	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1983-09-07	1984-03-08	1984-09-07	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1987-09-07	1988-03-08	1988-09-07	$7700.00	Window Closed / Lapsed

Apparatus and method for machining continuous mixer agitators and the like

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