John D. Butler

Radial lip seal

Method of making polytetrafluoroethylene sealing elements with hydrodynamic action

Dual-lip shaft seal with one spring-urged lip

Apparatus for measuring wheel end play

Oil seal having attached thereto two aligned polytetrafluoroethylene pieces forming seal lips

Method and mold for making a dual-lip shaft seal with one spring urged lip

Molding an elastomeric ring while bonding it to a metal case and to a fluorocarbon washer

Method of making an oil seal having two lips formed by splitting the blank

Radial lip seal and method of making it

Verfahren zum herstellen von wellendichtungen