US3826435A — Apparatus for dispersing pigments in a liquid pha…

Claim 1

Independent Claim 296 words

A ball mill, such as for dispersing pigments in a liquid substance, comprising in combination: upwardly opening, cup-shaped tub means defining a mixing chamber, said tub means including a bottom wall and an annular sidewall fixed to said bottom wall and projecting upwardly therefrom; frame means rotatably supporting said tub means in an upwardly opening manner for rotation about a substantially vertical axis; drive shaft means fixed to said tub means for rotating same, said drive shaft means including a vertically elongated tubular drive shaft fixed to said bottom wall and having an upper shaft portion projecting upwardly from said bottom wall into said chamber and a lower shaft portion projecting downwardly from said bottom wall; rotatable stirring means associated with said tub means for mixing the contents of said chamber, said stirring means including an elongated driving shaft concentrically and rotatably supported within said tubular drive shaft, said driving shaft having upper and lower end portions thereof disposed adjacent the upper and lower ends of said tubular drive shaft, respectively; said stirring means further including skirt means fixed to the upper end portion of said driving shaft and extending downwardly toward said bottom wall, said skirt means being positioned externally of said tubular drive shaft, and an annular stirring disk fixed to said skirt means adjacent the lower end thereof; and drive means for rotating said drive shaft and said driving shaft, said drive means including (1) a single drive motor of the rotating type, (2) first transmission means drivingly connecting said motor to the lower end portion of said driving shaft for rotating same, and (3) second transmission means drivingly connecting said motor to the lower shaft portion of said tubular drive shaft for rotating same, said second transmission means including disengageable clutch means.

Claim 2

Dependent Claim 296 words

A ball mill, such as for dispersing pigments in a liquid substance, comprising in combination: upwardly opening, cup-shaped tub means defining a mixing chamber, said tub means including a bottom wall and an annular sidewall fixed to said bottom wall and projecting upwardly therefrom; frame means rotatably supporting said tub means in an upwardly opening manner for rotation about a substantially vertical axis; drive shaft means fixed to said tub means for rotating same, said drive shaft means including a vertically elongated tubular drive shaft fixed to said bottom wall and having an upper shaft portion projecting upwardly from said bottom wall into said chamber and a lower shaft portion projecting downwardly from said bottom wall; rotatable stirring means associated with said tub means for mixing the contents of said chamber, said stirring means including an elongated driving shaft concentrically and rotatably supported within said tubular drive shaft, said driving shaft having upper and lower end portions thereof disposed adjacent the upper and lower ends of said tubular drive shaft, respectively; said stirring means further including skirt means fixed to the upper end portion of said driving shaft and extending downwardly toward said bottom wall, said skirt means being positioned externally of said tubular drive shaft, and an annular stirring disk fixed to said skirt means adjacent the lower end thereof; and drive means for rotating said drive shaft and said driving shaft, said drive means including (1) a single drive motor of the rotating type, (2) first transmission means drivingly connecting said motor to the lower end portion of said driving shaft for rotating same, and (3) second transmission means drivingly connecting said motor to the lower shaft portion of said tubular drive shaft for rotating same, said second transmission means including disengageable clutch means.

Claim 3

Dependent Claim 224 words

A ball mill according to claim 1, wherein said tub means includes wall means defining an annular ringlike chamber adjacent the upper outer edge of said tub means for controlling the discharge of product from said tub means due to centrifugal force, said wall means including a first annular wall portion defined by said sidewall adjacent the upper edge thereof, said first wall defining the outer radial periphery of said ringlike chamber, said wall means including a second ringlike wall portion fixedly connected to the upper edge of said first wall portion and projecting radially inwardly therefrom, said wall means including a third annular wall portion fixedly connected to said second wall portion adjacent the inner edge thereof, said third annular wall portion projecting axially inwardly into the interior of said tub and being spaced radially inwardly from said first annular wall portion so as to define the inner radial periphery of said ringlike chamber, said third annular wall portion defining a central opening providing continuous communication with the interior of said tub means, and said wall means including discharge opening means associated with one of said first and second wall portions for permitting the contents of said tub means to be discharged therefrom due to centrifugal force caused by rotation of said tub means, said discharge opening means having strainer means associated therewith.

Claim 4

Dependent Claim 19 words

A ball mill according to claim 2, wherein said discharge opening means is formed in said first wall portion.

Claim 5

Dependent Claim 19 words

A ball mill according to claim 2, wherein said discharge opening means is formed in said second wall portion.

Claim 6

Dependent Claim 113 words

A ball mill according tO claim 1, wherein said drive motor includes a motor drive shaft, said first transmission means including a first rotatable drive member fixedly secured to said motor drive shaft and a first rotatable driving member fixedly secured to said driving shaft and drivingly connected to said first drive member, and said second transmission means including a second rotatable drive member freely rotatably supported on said motor drive shaft and a second rotatable driving member fixedly secured to said tubular drive shaft and drivingly connected to said second drive member, and said clutch means coacting between said motor drive shaft and said second drive member for permitting selective rotation thereof.

Claim 7

Dependent Claim 78 words

A ball mill according to claim 5, further including brake means coacting with said second drive member for selectively maintaining same in a stationary position, and bearing means rotatably supporting said second drive member on said motor drive shaft for permitting said second drive member to slowly rotate due to frictional forces transmitted through said bearing means during rotation of said motor drive shaft after disengagement of said brake means but prior to engagement of said clutch means.

Claim 8

Dependent Claim 87 words

A ball mill according to claim 1, further including casing means at least partially surrounding said tub means for defining a cooling compartment extending around at least a portion of the external surface of said tub means for permitting a cooling fluid to be supplied thereto, and said tubular drive shaft having a first passageway formed axially thereof for permitting a cooling fluid to be supplied to said compartment and a second passageway formed axially thereof for permitting said cooling fluid to be discharged from said compartment.

Claim 9

Dependent Claim 150 words

A ball mill according to claim 1, wherein said stirring disk comprises a substantially horizontal platelike member disposed within a substantially horizontal plane and having a plurality of openings extending therethrough, said openings extending in a direction which is inclined at an angle of approximately 30* with respect to the horizontal plane of said disk, said direction being substantially perpendicular to a radial line drawn from the center of rotation of said disc through the respective opening, said disk having portions thereof disposed adjacent the opposite edges of each opening which define the leading and trailing edges of the respective opening, the portion defining the leading edge of each opening being bent downwardly from the horizontal plane defined by the lower surface of the disk, and the portion defining the trailing edge of the opening being bent upwardly from the horizontal plane defined by the upper surface of the disk.

Claim 10

Dependent Claim 71 words

A ball mill according to claim 1, wherein said stirring disk includes an annular hub portion fixed to the lower end of said skirt means and a platelike ring portion disposed within a substantially horizontal plane and spaced outwardly and upwardly from said hub portion, said platelike ring portion being fixedly interconnected to said hub portion by a plurality of inclined radially extending arms, said arms having their opposite edges chamfered.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1977-07-29	1978-01-28	1978-07-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1981-07-29	1982-01-28	1982-07-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1985-07-29	1986-01-28	1986-07-30	$7700.00	Window Closed / Lapsed

Apparatus for dispersing pigments in a liquid phase

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