Railroad car vertical isolator pad
Patent 5081935 Issued on January 21, 1992. Estimated Expiration Date: 
April 9, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 9, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2100065 3638582 Resilient railway truck bearing adaptor Steering railroad truck Railway truck bearing mounting assembly Assembly for and a method of absorbing impact shock loads Pot-type bearing for constructions such as bridges or the like Patent #: 4928339 InventorApplicationNo. 506248 filed on 04/09/1990US Classes:105/224.1, Deformable cushions105/218.1Axle bearing mountingExaminersPrimary: Oberleitner, Robert J.Assistant: Le, Mark T. Attorney, Agent or FirmForeign Patent References
International ClassB61F 005/30AbstractAn elastomeric vertical isolator pad for placement between the roller bearing adaptors of railroad cars and the car truck sideframes, the pad being formed of an elastomer having a melting point not lower than 500° Fahrenheit and having a Shore hardness durometer in the range of 50 to 70, the pad being configured to have a base and lower sidewall portions which fit snugly within a pocket on the top of the bearing adaptor, and having upper sidewalls portions extending upward beyond the upper surface of the bearing adaptor to a pad upper surface configured for surface engagement with an overlying part of the truck sideframe, the upper sidewall portions being angled inwardly to the pad upper surface.Field of SearchAxle bearing mountingAxle bearing mounted on pivotal sideframe arms Permanent fixture Detachable fixture Spring and guide Spring biased guide or guide follower Deformable cushions Wear plates RUBBER Elastomeric Nonmetallic, resilient element Mat or pad Nonmetallic resilient element Nonmetallic resilient element Laminated spring | |
