Railway rolling stock – Trucks – Bogie
Reexamination Certificate
2007-02-13
2007-02-13
Le, Mark T. (Department: 3617)
Railway rolling stock
Trucks
Bogie
C105S198200, C105S198400, C105S453000
Reexamination Certificate
active
10873126
ABSTRACT:
An improved three-piece truck system for railroad cars provides long travel side bearings for improved stability, a “wide” friction shoe design or equivalent to improve sideframe and bolster squareness, a resilient pedestal pad for improved curving performance and enhanced wear resistance, and a suspension system tuned and optimized for rail cars to have a minimum reserve capacity of less than 1.5 to improve motion control and ride quality, increase resistance to suspension bottoming, and increase hunting threshold speed. Such a motion control truck system is able to meet recent, more stringent American Association of Railroads standards, such as M-976, for railcars having a 286,000 lb. gross rail load rating.
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Adapter Plus, Pennsy Corporation, Version 9807, date-unknown, www.Pennsy.com/AdapterPlus/AdapterPlus.pdf.
Bearing Adapter Pad, Lord Corporation, date-unknown, www.lord.com/Default.aspx?tabid=859.
Berg Thomas R.
Pershwitz Julius I.
Reese Nathan J.
Ruback Jeffrey M.
Schorr Ralph H.
ASF-Keystone, Inc.
Le Mark T.
Oliff & Berridg,e PLC
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