William P Liljestrom

US Patent:

48528188, Aug 1, 1989

Filed:

Dec 7, 1987

Appl. No.:

7/112408

Inventors:

Thomas E. Rolle - Dubuque IA
David J. Nebel - Dubuque IA
John L. Shulan - Dubuque IA
William P. Liljestrom - Dubuque IA

Assignee:

T.D.J. Co., Inc. - Dubuque IA

International Classification:

B02C 1918

US Classification:

241301

Abstract:

A comminution device is provided which has a rotatable turbine mounted in a housing for causing an air flow through an expansion chamber. Material to be comminuted is carried in an air stream through the expansion chamber where it is rapidly decompressed causing it to explode. The turbine is made of a plurality of air foil blades mounted on a backing plate and is dimensioned in close tolerance to its housing. Exchangeable expansion chambers are provided to vary the rate of pressure reduction which affects the size of the communited material. The shaft of the turbine is mounted in oil cooled bearings to increase the life and efficiency of the bearings and turbine blades.

US Patent:

48922617, Jan 9, 1990

Filed:

Apr 21, 1989

Appl. No.:

7/341793

Inventors:

Thomas E. Rolle - Dubuque IA
David J. Nebel - Dubuque IA
John L. Shulan - Dubuque IA
William P. Liljestrom - Dubuque IA

Assignee:

The T.D.J. Co., Inc. - Dubuque IA

International Classification:

B02C 1918

US Classification:

241301

Abstract:

A comminution device is provided which has a rotatable turbine mounted in a housing for causing an air flow through an expansion chamber. Material to be comminuted is carried in an air stream through the expansion chamber where it is rapidly decompressed causing it to explode. The turbine is made of a plurality of air foil blades mounted on a backing plate and is dimensioned in close tolerance to its housing. Exchangeable expansion chambers are provided to vary the rate of pressure reduction which effects the size of the communited material. The shaft of the turbine is mounted in oil cooled bearings to increase the life and efficiency of the bearings and turbine blades.

US Patent:

47186097, Jan 12, 1988

Filed:

Mar 20, 1986

Appl. No.:

6/841795

Inventors:

Thomas E. Rolle - Dubuque IA
David J. Nebel - Dubuque IA
John L. Shulan - Dubuque IA
William P. Liljestrom - Dubuque IA

Assignee:

T. D. J. Co., Inc. - Dubuque IA

International Classification:

B02C 1918

US Classification:

241 33

Abstract:

A comminution device is provided which has a rotatable turbine mounted in a housing for causing an air flow through an expansion chamber. Material to be comminuted is carried in an air stream through the expansion chamber where it is rapidly decompressed causing it to explode. The turbine is made of a plurality of air foil blades mounted on a backing plate and is dimensioned in close tolerance to its housing. Exchangable expansion chambers are provided to vary the rate of pressure reduction which affects the size of the communited material. The shaft of the turbine is mounted in oil cooled bearings to increase the life and efficiency of the bearings and turbine blades.

US Patent:

48511102, Jul 25, 1989

Filed:

Jan 13, 1988

Appl. No.:

7/144678

Inventors:

Thomas E. Rolle - Dubuque IA
David J. Nebel - Dubuque IA
John L. Shulan - Dubuque IA
William P. Liljestrom - Dubuque IA

Assignee:

T.D.J. Co., Inc. - Dubuque IA

International Classification:

B07B 400

US Classification:

209135

Abstract:

A device and method for separating particles by mass is provided in which the particles are entrained in an airstream and are ejected into a collection zone where they will fall under the influence of gravity, but will separate longitudinally by mass with the most massive particles traveling the farthest. As an enhancement to the separation, an apparatus for forming at least one air curtain perpendicular to the ejection direction is provided which causes the falling particles to separate into discrete groups.

US Patent:

46485600, Mar 10, 1987

Filed:

Jun 25, 1985

Appl. No.:

6/748626

Inventors:

Thomas E. Rolle - Dubuque IA
David J. Nebel - Dubuque IA
John L. Shulan - Dubuque IA
William P. Liljestrom - Dubuque IA

Assignee:

T.D.J. Co., Inc. - Dubuque IA

International Classification:

B02C 1912

US Classification:

241 24

Abstract:

A method is provided of separating non-homogeneous materials, such as solid waste by-products from a foundry, by classifying the materials according to size through a series of classifying screens recognizing that particular types of materials within the entire sample tend to fall within certain size ranges permitting the sample to be sorted to a degree according to size to concentrate particular types of materials.