John H Muhlenkamp

US Patent:

6454059, Sep 24, 2002

Filed:

Apr 4, 2001

Appl. No.:

09/826020

Inventors:

Sohrab Sadri Lonbani - Xenia OH
John H. Muhlenkamp - Dayton OH
Patrick N. Hopkins - West Carrollton OH
Ilya Lisenker - Miamisburg OH
Venkatasubramanian Ananthanarayanan - Beaver Creek OH

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

F16F 953

US Classification:

188267, 137909

Abstract:

A magneto-rheological damping device comprises a core element for carrying a magnetic flux and a magnetic flux generator positioned adjacent to a portion of the core element and operable to generate a magnetic flux in the core element. A sleeve is positioned over the core element and magnetic flux generator and includes a plurality of protrusions extending generally radially outwardly from a center of the core element. A flux ring surrounds the core element and sleeve and defining a passage between flux ring and core element for the flow of a magneto-rheological fluid. The sleeve protrusions are configured to engage the flux ring and secure the flux ring in a concentric position around the core element and sleeve.

US Patent:

62606751, Jul 17, 2001

Filed:

Jan 31, 2000

Appl. No.:

9/494977

Inventors:

John H. Muhlenkamp - Centerville OH

Assignee:

Delphi Technologies, Inc. - Troy MI

International Classification:

F16F 1503

US Classification:

188267

Abstract:

A novel and improved magnetorheological fluid damper is provided which effectively secures a flux ring to a piston core in a manner which prevents relative axial and radial movement between the flux ring and the core throughout operation. The damper includes crimp portions formed on each end of the flux ring for engaging respective end plates positioned at each end of the piston core to secure the end plates and thus the flux ring to the piston core. One of the end plates may, in turn, function to maintain a piston rod in connection with the piston core. Specifically, each end plate functions as a spring device by being elastically deformed during a crimping process causing the end plates to apply a spring force against the flux ring. One of the end plates may also apply another spring force to the piston rod. A crimping method is also provided which effectively and efficiently permits crimping in a simple manner.