An improved valve bridge assembly and improved method of manufacturing the same, both new and rebuilt, are disclosed. The valve bridge is of the type that actuates the exhaust valves in larger internal combustion engines, such as locomotive diesel engines, and that has oversized lash adjuster sockets...http://www.google.fr/patents/US4677723?utm_source=gb-gplus-shareBrevet US4677723 - Valve bridge construction method
