John Loyd Spence

US Patent:

6409180, Jun 25, 2002

Filed:

Apr 21, 2000

Appl. No.:

09/556815

Inventors:

John Loyd Spence - Severna Park MD
Kevin R. Felber - Bowie MD

Assignee:

PerkinElmer, Inc. - Wellesley MA

International Classification:

F16J 1502

US Classification:

277608, 277626, 277647, 277910, 277644

Abstract:

A metallic seal is provided that concentrates the available load over a narrow band to produce a sealing dam over a sufficient width to minimize leakage on a molecular level. The metallic seal has a first annular beam section, a second annular beam section, and inner and outer surfaces extending between the first and second annular beam sections. One of the inner and outer surfaces has an annular recess that at least partially defines an annular column section of material extending substantially perpendicular between said first and second annular beam sections thereto. The first annular beam section has a first non-sealing surface and a first raised portion with a first annular sealing surface facing in a first axial direction to contact a first member for creating a first annular sealing dam therebetween. The second annular beam section has a second non-sealing surface and a first raised portion with a second annular sealing surface facing in a second axial direction, which is opposite to the first axial direction, to contact a second member for creating a second annular sealing dam therebetween. The annular inner surface extends between the first and second sealing surfaces to form a central passageway.

US Patent:

7004478, Feb 28, 2006

Filed:

Dec 7, 2001

Appl. No.:

10/005178

Inventors:

John Loyd Spence - Severna Park MD, US
Stephen B. Rowland - Laurel MD, US

Assignee:

PerkinElmer Inc. - Wellesley MA

International Classification:

F16J 15/02

US Classification:

277644, 277626

Abstract:

A metallic seal is provided that concentrates the available load over a narrow band to produce a sealing dam over a sufficient width to minimize leakage on a molecular level. The metallic seal has a first annular end section with has a first annular sealing surface, a second annular end section with a second annular sealing surface and an annular center section extending between the first and second annular end sections to form a ring having a central passageway with a center longitudinal axis. The third annular section is frustoconical tube with the first and second annular end sections being contiguously arranged at opposite ends of the annular center section such that sealing loads applied substantially perpendicularly on the first and second annular sealing surfaces primarily deform due to torsional stress of the metallic seal.

US Patent:

RE39973, Jan 1, 2008

Filed:

Jun 25, 2004

Appl. No.:

10/876288

Inventors:

John Loyd Spence - Severna Park MD, US
Kevin R. Felber - Clarksville MD, US

Assignee:

PerkinElmer, Inc. - Wellesley MA

International Classification:

F16J 15/02

US Classification:

277608, 277644, 277647, 277910, 277626

Abstract:

A metallic seal is provided that concentrates the available load over a narrow band to produce a sealing dam over a sufficient width to minimize leakage on a molecular level. The metallic seal has a first annular beam section, a second annular beam section, and inner and outer surfaces extending between the first and second annular beam sections. One of the inner and outer surfaces has an annular recess that at least partially defines an annular column section of material extending substantially perpendicular between said first and second annular beam sections thereto. The first annular beam section has a first non-sealing surface and a first raised portion with a first annular sealing surface facing in a first axial direction to contact a first member for creating a first annular sealing dam therebetween. The second annular beam section has a second non-sealing surface and a first raised portion with a second annular sealing surface facing in a second axial direction, which is opposite to the first axial direction, to contact a second member for creating a second annular sealing dam therebetween. The annular inner surface extends between the first and second sealing surfaces to form a central passageway.