ROBERT CHARLES BOYER
Engineers in Annapolis, MD
License number
Pennsylvania PE020074E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Annapolis, MD 21404
Pennsylvania
Pennsylvania
Professional information
Floating Ring Expansion Joint Liner Seal
US Patent:
5443290, Aug 22, 1995
Filed:
Dec 3, 1993
Appl. No.:
8/160880
Inventors:
Robert C. Boyer - Annapolis MD
Vincent J. DiSciullo - Wilmington DE
Vincent J. DiSciullo - Wilmington DE
Assignee:
Mid-Atlantic Technical Services Incorporated - Annapolis MD
International Classification:
F16L 1702
US Classification:
285 95
Abstract:
An expansion joint includes first and second conduits connected by an expansion joint element. The second conduit has a liner portion which protrudes into the first conduit, so that the expansion joint element, first conduit, second conduit and liner portion together define an expansion joint cavity. A cartridge is located within the expansion joint cavity and is affixed to an end portion of the first conduit. The cartridge has a groove which faces the liner portion and houses a ring which slides within the groove while maintaining sliding contact with the liner portion of the second conduit. The outer diameter of the groove is preferably larger than an outer diameter of the ring to allow lateral movement of the first and second conduits relative to one another. Either the expansion joint cavity or the cartridge groove may be provided with a purge fluid inlet to prevent the intrusion of the service fluid and its associated contaminants into the expansion joint cavity.