David J Toth

US Patent:

6705617, Mar 16, 2004

Filed:

Nov 28, 2001

Appl. No.:

09/995939

Inventors:

Edward W. Mellet - Royal Oak MI
David M. Toth - Brighton MI
Carole L. Straub - Ida MI

Assignee:

Federal-Mogul World Wide, Inc. - Southfield MI

International Classification:

F16J 1532

US Classification:

277559, 277560, 29417

Abstract:

A hydrodynamic shaft seal formed with a spiral hydrodynamic channel in which successive turns of the channel are of progressively diminishing volume toward an air side of the seal. The channel is made by forming a spirally extending first cut in a surface of the seal, and forming a spirally extending second cut in the surface of the seal adjacent to the first cut such that the first and second cuts intersect below the surface of the seal to produce a spiral channel. The spiral of the first cut has a lead different from the lead of the second cut such that the channel is of progressively diminishing volume along its length. Alternatively, the second cut may have the same lead as the first cut for the first few turns, after which the lead of the second cut may be reduced, to provide a channel of constant volume for the first few turns, followed by a channel portion of reduced volume.

US Patent:

7055828, Jun 6, 2006

Filed:

Mar 21, 2003

Appl. No.:

10/394272

Inventors:

Frederick R. Hatch - Ann Arbor MI, US
Matthew J. Cibor - Rochester MI, US
David M. Toth - Brighton MA, US
Ronald J. Krimmer - Canton MI, US

Assignee:

Federal-Mogul World Wide, Inc. - Southfield MI

International Classification:

F16J 15/32

US Classification:

277570, 277571, 277551, 277562, 277351

Abstract:

A lubricant seal assembly has an outer seal component and a separate inner wear sleeve. The outer seal component has a carrier and a PTFE seal element which lays down against the wear sleeve to provide a seal collar extending to an oil side of the seal assembly. The wear sleeve is formed on an air side of the assembly with an end flange, but is free of any such flanges on the oil side. The end flange has an axial portion extending into the seal component to define a labyrinth debris exclusion path. One or more elastomeric debris exclusion lips are formed on the carrier and are precisely positioned relative to the wear sleeve with the aid of an installation tool that engages end faces of the seal component and wear sleeve to press them into precise axial alignment relative to one another in repeatable fashion.

US Patent:

8052152, Nov 8, 2011

Filed:

Mar 7, 2008

Appl. No.:

12/044252

Inventors:

Brent Ryan Sedlar - Ann Arbor MI, US
David Michael Toth - Brighton MI, US

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 15/32

US Classification:

277561, 277530, 277572

Abstract:

A shaft seal for forming a dynamic seal along an axially extending annular running surface and method of installation thereof is provided. The shaft seal has a mounting portion configured to be connected to a stationary housing and a seal lip having an annular sealing surface extending between an oil side end and an air side end of the seal lip. The sealing surface is configured to extend axially along a shaft running surface. An annular bridge portion connects the seal lip to the mounting portion. A plurality of webs extend generally radially between the bridge portion and the mounting portion to prevent the seal lip from being inadvertently unfolded during installation or while in use. An annulus can be used to install the shaft seal into a housing and about a shaft without the need for secondary operations.

US Patent:

8235391, Aug 7, 2012

Filed:

Mar 17, 2010

Appl. No.:

12/725759

Inventors:

Frederick R. Hatch - Ann Arbor MI, US
David M. Toth - Brighton MI, US

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 15/02

US Classification:

277353, 277551, 277562, 277577

Abstract:

A radial shaft seal assembly includes an outer case having an axially extending cylindrical outer rim and an axially extending cylindrical inner rim spaced radially from one another by an annular pocket. A radially extending first leg connects the outer rim to the inner rim and a second leg extends radially inwardly from the inner rim to a free end. The assembly includes a wear sleeve having an axially extending cylindrical wall with an outer surface providing a running surface and a flange extending radially outwardly from the running surface. A seal lip extends inwardly from the free end of the second leg into sealing abutment with the running surface. A first porous filter is received in the pocket, and a second porous filter extends in substantial abutment with the outer rim and the second leg of the outer case.

US Patent:

8398089, Mar 19, 2013

Filed:

Jan 28, 2010

Appl. No.:

12/695534

Inventors:

Brent R. Sedlar - Ann Arbor MI, US
David M. Toth - Brighton MI, US

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 15/32

US Classification:

277561, 277549

Abstract:

A radial shaft seal configured for receipt in a housing and about a shaft to sealingly isolate an air side of the seal from an oil side of the shaft seal is provided. The seal includes a mounting portion and a seal lip having an annular sealing surface extending between an oil side end and a free air side end. An annular bridge is connected to the oil side end of the seal lip by a first hinge and to the mounting portion by a second hinge. The bridge extends from the first hinge to the second hinge in radially overlying relation to the seal lip. An annular projection extends from the mounting portion axially away from the bridge. The projection has an oil side facing the seal lip and confronts the air side end of the seal lip upon the seal lip pivoting about the first hinge.

US Patent:

8439363, May 14, 2013

Filed:

Sep 20, 2010

Appl. No.:

12/886099

Inventors:

Gerald A. Greca - Carleton MI, US
David M. Toth - Brighton MI, US

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 15/32

US Classification:

277353, 277551, 277572

Abstract:

A dynamic radial shaft seal assembly includes an inner wear sleeve having a cylindrical inner wall with a bore sized for receipt about a shaft and an outer running surface. The inner wear sleeve has a flange extending radially outwardly from the running surface. The assembly further includes an outer case having cylindrical outer wall configured for receipt in a housing and a rim extending radially inwardly from the outer wall. An elastomeric body is attached to the rim. The elastomeric body includes a main seal lip configured to engage the outer running surface of the inner wear sleeve and a plurality of thrust pads extending axially from the rim for engagement with the flange. The thrust pads are spaced circumferentially from one another by gaps. The elastomeric body further includes a first dust exclusion lip extending axially from the leg and bridging the gaps.

US Patent:

8459654, Jun 11, 2013

Filed:

May 3, 2011

Appl. No.:

13/099474

Inventors:

Frederick R. Hatch - Ann Arbor MI, US
David M. Toth - Brighton MI, US

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 15/32
F16J 15/34

US Classification:

277559, 277402

Abstract:

A hydrodynamic shaft seal assembly includes a PTFE seal member having outer and inner sections. The outer section is affixed to an annular carrier. The inner section is free and includes at least one hydrodynamic groove in direct running contact with a rotating shaft or wear sleeve. A mid-portion of the seal member is formed between the inner and outer sections. The mid-portion is thinned and includes one or more annular undulations formed therein to improve flexibility of the inner section relative to the outer section. The seal assembly may include one or more excluder features. A rubber casing is molded about portions of the carrier. Preferably, one or more annular undulations are formed in a coining operation during the rubber molding process.

US Patent:

8500130, Aug 6, 2013

Filed:

Jan 28, 2010

Appl. No.:

12/695404

Inventors:

Brent R. Sedlar - Ann Arbor MI, US
David M. Toth - Brighton MI, US

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 15/32

US Classification:

277560, 277559, 277561

Abstract:

A radial shaft seal configured for receipt in a housing and about a shaft to sealingly isolate an air side of the seal from an oil side of the shaft seal is provided. The seal includes a mounting portion and a seal lip having an annular sealing surface extending between an oil side end and a free air side end. An annular bridge is connected to the oil side end of the seal lip by a first hinge and to the mounting portion by a second hinge. The bridge extends from the first hinge to the second hinge in radially overlying relation to the seal lip. A projection extends from the first hinge away from the bridge toward the oil side of the seal to prevent the seal lip from inverting during the oil-side installation assembly.