Grout vent for a tendon-receiving duct
January 25, 2022. 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 3181899 Duct coupler with hinge interconnected locking rings Corrugated spiral pipe joint, corrugated spiral pipe provided with the joint, producing method therefor, and method of connecting a corrugated spiral pipe to the corrugated spiral pipe Drainage connector and device to connect to drainage connector Footing connector and method of use Tendon-receiving duct support apparatus Coupler for ducts used in post-tension rock anchorage systems D400670 Composite concrete metal encased stiffeners for metal plate arch-type structures Duct coupler apparatus InventorApplicationNo. 055079 filed on 01/25/2002US Classes:285/139.1, Plate clamped between flanged nipple and separate fastener285/139.2, Nipple includes seal285/903CORRUGATEDExaminersPrimary: Nicholson, Eric K.Attorney, Agent or FirmInternational ClassF16L 005/02AbstractA grout vent for a tendon-receiving duct having a tubular fitting with an interior passageway, a nut secured around an exterior surface of the tubular fitting, and a seal extending around the tubular fitting and residing against a surface of the nut. The tubular fitting has a connector at an end thereof for engaging an interior surface of the duct. The tubular fitting extends through a hole formed in a corrugation of the duct so that a shoulder of the connector will abut an interior surface of a wall of the duct. The nut is threadedly engaged with an exterior surface of the tubular fitting so as to exert a compressive force against the seal. A grout line extends through the interior passageway of the tubular fitting so as to allow grout to be injected into an interior passageway of the duct. | |
