Nicholas K Petek

US Patent:

8573113, Nov 5, 2013

Filed:

Apr 30, 2010

Appl. No.:

12/771630

Inventors:

Chester Oleniacz - Parma OH, US
David D. Colavincenzo - Castalia OH, US
Jeffrey Michael Geither - North Ridgeville OH, US
Nicholas Petek - North Royalton OH, US

Assignee:

Bendix Commercial Vehicle Systems LLC - Elyria OH

International Classification:

F16J 9/28

US Classification:

92242

Abstract:

A piston and cylinder assembly includes a housing defining a bore. A piston is sized to reciprocate in the bore. A first sealing member provides a sealing engagement between the piston and a wall of the bore. A first bushing, of a first material, is around a first portion of the piston toward a first end of the piston. A second bushing, of a second material, is around a second portion of the piston toward a second end of the piston. The first and second bushings guide the piston within the bore. The first material is different than the second material.

US Patent:

57323704, Mar 24, 1998

Filed:

Apr 26, 1996

Appl. No.:

8/639142

Inventors:

Frederick P. Boyle - Kirtland OH
Nicholas K. Petek - Cleveland Heights OH
Dale P. Smith - Cleveland OH

Assignee:

The Lubrizol Corporation - Wickliffe OH

International Classification:

B60G 17015
G06F 1710

US Classification:

701 37

Abstract:

The relative motion and force between two interconnected elements can be controlled by a semi-active two-stage adjustable damper to maximize isolation between the elements, while minimizing the instances of the motion exceeding acceptable limits. An algorithm determines when to apply the high force state of the damper to provide excellent isolation from input vibration and shocks. The dampers and control algorithms are useful in primary vehicle suspension systems, cab mounts, seat mounts and engine mounts.

US Patent:

52594874, Nov 9, 1993

Filed:

Jul 14, 1992

Appl. No.:

7/913118

Inventors:

Nicholas Petek - Cleveland Heights OH

Assignee:

The Lubrizol Corporation - Wickliffe OH

International Classification:

F16F 1503

US Classification:

188267

Abstract:

Adjustable dampers using electrorheological (ER) fluids comprise one or more annular ER fluid transfer ducts in fluid communication with fluid chambers on opposite sides of the damper pistons. Each duct has one or more contoured surfaces or bands along a portion of the length of one or both walls of the ducts providing one or more annular constricted working areas through which the ER fluid is forced when displaced by movement of the pistons. By selectively applying a voltage/electric field across the primary working areas, the flow resistance of the ER fluid passing through the primary working area is increased which increases the damping force of the dampers.

US Patent:

55823858, Dec 10, 1996

Filed:

Apr 27, 1995

Appl. No.:

8/429990

Inventors:

Frederick P. Boyle - Kirtland OH
Nicholas K. Petek - Cleveland Heights OH
Dale P. Smith - Cleveland OH

Assignee:

The Lubrizol Corporation - Wickliffe OH

International Classification:

F16M 1300

US Classification:

248550

Abstract:

The relative motion and force between two interconnected elements can be controlled by a semi-active damper to minimize the instances of the motion exceeding acceptable limits, while maximizing isolation between the elements. Applying an algorithm to the control parameters of the damper provides excellent isolation from input vibration and shocks. The dampers and control algorithms are useful in primary vehicle suspension systems, cab mounts, seat mounts, and engine mounts.