Parker-Hannifin Corporation

John C Ariel

George R Watchko

Peter M Jones

Douglas Nobbs

Matthew T Gagnon

Lawrence J Denefrio

Eric G Krohto

Marc E LaRosse

An apparatus for providing board level shielding of Electromagnetic Interference in a printed circuit board is disclosed. The apparatus includes a plastic part, a metal conformal coating and a form-in-place Electromagnetic Interference gasket. The plastic part is configured in one or more compartments to provide an enclosure, and is attached to the printed circuit board. The metal conformal coating is applied continuously to one or more surfaces of the plastic part. The form-in-place Electromagnetic Interference gasket is applied on top of the metal conformal coating in an area of a part flange.

Board level shielding module

A strip gasket utilizing a low closure force on an enclosing face for shielding electromagnetic interference is disclosed. The strip gasket includes an outer surface and an inner surface. The inner surface provides a hollow cross section region. Bending moments are created on surface peripheries of the inner surface and the outer surface, or both, to provide a low closure force on an enclosing face. The bending moment results in an increased surface area of the strip gasket providing a low resistance. Cauchy's stress analysis reveals that a lower force is required to compress the strip gasket as compared to conventional strip gaskets.

Strip gaskets for EMI shielding

A EMI shielding gasket for interposition between a first and a second part of a housing or other enclosure. The gasket is supportable on the first part and extends in a longitudinal direction along a first dimension thereof. The profile includes an elongate bearing portion extending axially from a proximal to a distal end contactable by the second part. The bearing portion has an outboard side extending longitudinally intermediate the proximal and distal ends, and an inboard side extending intermediate the proximal and distal ends. The bearing portion is deformable responsive to a compressive force between the first and second parts into a stressed orientation wherein the bearing portion is deflected towards the inboard side and developing in the outboard side a localized high stress region. A stress relief portion is formed in such region which is effective to decrease the compressive force required to deform the bearing portion.

Notched gasket for low closure force EMI shielding applications

Growing community of inventors

Nashua, NH, United States of America

John C Ariel