David A 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:

7100924, Sep 5, 2006

Filed:

Jan 15, 2004

Appl. No.:

10/757919

Inventors:

David Michael Toth - Brighton MI, US
Bhawani Sankar Tripathy - Ann Arbor MI, US

Assignee:

Federal-Mogul Worldwide, Inc. - Southfield MI

International Classification:

F16J 15/32

US Classification:

277558, 277562, 277560, 277570

Abstract:

A hydrodynamic PTFE seal for a rotating part including a first portion supported by a flexible, elastomeric member and a second portion extending from the first portion past the elastomeric member along the rotating part. The second or trailing portion of the seal is concentrically disposed about the rotating part. The first portion of the seal attached to the elastomeric member is also concentrically disposed around the rotating part. The seal can also include a living hinge portion disposed between the first and second portions. The first portion, the second portion and the living hinge portion can jointly define a continuous sealing surface.

US Patent:

7341257, Mar 11, 2008

Filed:

Apr 15, 2005

Appl. No.:

11/108028

Inventors:

David M. Toth - Brighton MI, US
Richard E. Dewald - Clinton MI, US
Bhawani Tripathy - Ann Arbor MI, US

Assignee:

Federal-Mogul World Wide, Inc - Southfield MI

International Classification:

F16J 15/32
F16C 32/00
G01P 3/48

US Classification:

277551, 277572, 384448, 324174

Abstract:

A shaft seal/position sensor module assembly includes a carrier body that is mountable on a shaft housing about an opening through which a rotatable shaft extends. A sleeve is mountable on the shaft and carries a multi-pole encoder ring having a radially outwardly facing sensor surface. A magneto-resistive sensor is mounted on said carrier body in position to communicate with said sensor surface of said encoder ring.

US Patent:

7419165, Sep 2, 2008

Filed:

Aug 18, 2004

Appl. No.:

10/920689

Inventors:

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

Assignee:

Federal-Mogul World Wide, Inc. - Southfield MI

International Classification:

F16J 15/32

US Classification:

277569, 277549, 277559

Abstract:

A seal assembly and method for the manufacture thereof is provided. The seal assembly provides a dynamic fluid seal between a housing having a bore and a shaft having an outer running surface rotating within the bore. The seal assembly comprises a rigid carrier for supporting the seal assembly within the bore of the housing. A flexible member is mounted to the rigid carrier. The flexible member is formed from an elastomeric material that allows the flexible member to flex during use. A sealing element is retained by the flexible member about the outer running surface. The sealing element is formed from a non-polytetrafluoroethylene bearing grade plastic material having a hardness relatively greater than a hardness of the elastomeric material of the flexible member. The sealing element moves with the flexible member as the flexible member flexes. The sealing element extends along the outer running surface in a plurality of helically wound convolutions.

US Patent:

7455459, Nov 25, 2008

Filed:

Mar 9, 2006

Appl. No.:

11/371405

Inventors:

David M Toth - Brighton MI, US
Gerald A Greca - Carleton MI, US
Michael J Anderson - Brighton MI, US

Assignee:

Federal Mogul World Wide, Inc. - Southfield MI

International Classification:

F16C 32/00
G01P 3/488

US Classification:

384448, 324174

Abstract:

An oil lubricated rotating hub () and stationary spindle () assembly includes an oil bath seal (′) for establishing a dynamic sealing interface between the hub () and spindle (). A wheel sensor assembly includes a variable reluctance senor () targeted at an encoder ring (′) which is integrated into the oil bath seal (′). The encoder ring (′) is of the permanent magnet type including a plurality of magnetically polarized sectors alternating between North and South polarities. The use of an encoder style target (′) in combination with a variable reluctance sensor () enables improved slow speed sensing with relatively large air gap spacing between the exposed (′) of the encoder ring (′) and the head of the VR sensor (). Furthermore, the encoder ring (′) enables use of less expensive, lighter materials for the oil bath seal carrier (′).

US Patent:

7832100, Nov 16, 2010

Filed:

Jul 25, 2008

Appl. No.:

12/179743

Inventors:

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

Assignee:

Federal-Mogul World Wide Inc. - Southfield MI

International Classification:

F16J 15/32

US Classification:

298883, 29456, 294695, 277569, 277549, 277559

Abstract:

A seal assembly and method for the manufacture thereof is provided. The seal assembly provides a dynamic fluid seal between a housing having a bore and a shaft having an outer running surface rotating within the bore. The seal assembly comprises a rigid carrier for supporting the seal assembly within the bore of the housing. A flexible member is mounted to the rigid carrier. The flexible member is formed from an elastomeric material that allows the flexible member to flex during use. A sealing element is retained by the flexible member about the outer running surface. The sealing element is formed from a non-polytetrafluoroethylene bearing grade plastic material having a hardness relatively greater than a hardness of the elastomeric material of the flexible member. The sealing element moves with the flexible member as the flexible member flexes. The sealing element extends along the outer running surface in a plurality of helically wound convolutions.

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.