David M 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:

8573602, Nov 5, 2013

Filed:

Aug 23, 2011

Appl. No.:

13/215528

Inventors:

Andrew Payne - Grandville MI, US
Brent R. Sedlar - Ann Arbor MI, US
David M. Toth - Brighton MI, US
Frederick R. Hatch - Ann Arbor MI, US

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 15/32

US Classification:

277559

Abstract:

A radial shaft seal configured for receipt in a housing and about a shaft to sealingly isolate an air-side of the shaft seal from an oil-side of the shaft seal is provided. The seal includes an annular mounting portion and a seal lip operably attached to the mounting portion. The seal lip has an annular inner sealing surface extending axially between an oil-side end and a free air-side end. The inner sealing surface has a first groove region extending along the shaft in sealed engagement therewith and a second groove region extending along the shaft in sealed engagement therewith. The first groove region and the second groove region are spaced axially from one another by an intermediate non-grooved region. The first groove region is configured to direct contamination toward the air-side of the seal and the second groove region is configured to direct lubrication toward the oil-side of the seal.

US Patent:

54923433, Feb 20, 1996

Filed:

Mar 4, 1994

Appl. No.:

8/206787

Inventors:

Stanley N. Smith - Farmington MI
David M. Toth - Brighton MI

Assignee:

Federal-Mogul Corporation - Southfield MI

International Classification:

F16J 1512

US Classification:

277180

Abstract:

A gasket includes an internal stiffener wire which maintains the semi-rigid shape of the gasket while it is in storage or during the process of its installation between two workpieces. Rigid compression limiter rings are attached to the wire by a tack weld or by semi-open loops formed in the wire. The loops mate with peripheral grooves in the rings. Each ring is secured within a side opening in each loop with a sliding or snap-fit connection. The rings may be loosely held within the loops to allow the rings to self align themselves with positioning pins provided in an injection mold which subsequently forms the gasket material around the wire and rings.