David R Dobbs

US Patent:

6549001, Apr 15, 2003

Filed:

Nov 2, 2001

Appl. No.:

10/012880

Inventors:

David Dobbs - Livonia MI
Mark F. Spreitzer - Milford MI
Morgan J. Bullard - Hampshire IL

Assignee:

SKF USA Inc. - Elgin IL

International Classification:

G01P 348

US Classification:

324173, 32420722, 384448

Abstract:

A tone ring assembly for use on a rotatable machine part. The tone ring is able to generate a varying voltage output when rotated at varying speeds. A fixed position magnetic sensor detects this voltage. The tone ring comprises an axially extending main body portion having a plurality of areas able to generate a voltage upon rotation. A retainer having at least one radial flange prevents axial movement of the tone ring and the tone ring includes ribs and spaces on its inside diameter to permit oil to pass therethrough.

US Patent:

6664780, Dec 16, 2003

Filed:

Jun 3, 2002

Appl. No.:

10/161437

Inventors:

David Dobbs - Livonia MI
Mark F. Spreitzer - Milford MI
Morgan J. Bullard - Hampshire IL
Wayde Fausett - Wonder Lake IL

Assignee:

SKF USA Inc. - Elgin IL

International Classification:

G01P 348

US Classification:

324173, 32420722

Abstract:

A tone ring assembly for use on a rotatable machine part. The tone ring is able to generate a varying voltage output when rotated at varying speeds. A fixed position magnetic sensor detects this voltage. The tone ring comprises an axially extending main body portion having a plurality of areas able to generate a voltage upon rotation. A retainer having at least one radial flange prevents axial movement of the tone ring and the tone ring includes ribs and spaces on its inside diameter to permit oil to pass therethrough.

US Patent:

7959157, Jun 14, 2011

Filed:

Dec 13, 2006

Appl. No.:

11/610252

Inventors:

David Dobbs - Berkley MI, US
Mark F. Spreitzer - Howell MI, US
Dennis Nelson Denton - Weddington NC, US
Kacy D. Denton - Belmont NC, US
Kevin R. Suva - Wood Dale IL, US

Assignee:

SKF USA Inc. - Elgin IL

International Classification:

F16J 15/32

US Classification:

277551, 277561, 277572, 29235

Abstract:

An oil seal having the usual lips for retaining oil and a guide member made of a variety of relatively stiff or rigid materials. The guide member is made slightly larger than the smallest diameter of the seal member when the seal rests on the shaft. The seal member can have the guide member on either the air side or the oil side of the seal. The disclosure also relates to a shipping plug, which is inserted into the seal and retains the oil in place during shipping when the seal is installed but a shaft is not installed.