Joints and connections – Including distinct packing
Reexamination Certificate
2000-02-01
2001-11-06
Kim, Harry C. (Department: 3629)
Joints and connections
Including distinct packing
C403S343000, C411S303000
Reexamination Certificate
active
06312185
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention relates to a rod anchor for tension rods comprising an anchor head with a threaded bore hole into which the end of a tension rod with an outer thread can be screwed.
This type of rod anchors is known from EP 04 80 9571B1. Therein the anchor head has usually two parallel eye bars that have bore holes for the insertion of eye pins. In this context, coupling sleeves or spring-loaded couplings are also meant to be rod anchors, which serve to connect two rods having outer threads.
In practice it has been shown that corrosion may occur in the area of the thread connection between the tension rod and the anchor head. Therefore, it is the task of the invention to develop a rod anchor of the above-mentioned type in such a manner that corrosion is prevented in the area of the connection between the tension rod and the anchor head.
SUMMARY OF THE INVENTION
This task is solved according to the invention in that a sealing nut, which is placed against the front side of the anchor head, has an inner rod seal and this inner rod seal forms a seal around the smooth cylindrical outer surface of the tension rod while being screwed down, so that the sealing nut is completely sealed against the anchor head and whereby the threaded bore hole is tightly closed at its inner bore end.
In this way, complete sealing is achieved in the corrosion-susceptible area of the threaded connection between the tension rod and the anchor head. The insertion of a special sealing nut to form a seal around the tension rod has the effect that this especially critical and important sealing section in the area of the smooth cylindrical outer surface of the cylinder may be relocated and is therefore outside the outer thread of the tension rod since effective sealing in the threaded area itself in not possible.
An additional sealing measure in the area between the sealing nut and the anchor head or between the end of the threaded bore hole of the anchor head ensures that no moisture may penetrate into these areas so that the threaded connection between the tension rod and the anchor head is completely sealed on all sides. Thereby penetration of moisture and development of corrosion is made impossible.
According to a preferred version of the invention, the attachment of the sealing nut is accomplished in a simple manner whereby the sealing nut is a lock nut that is screwed with its inner nut thread to the outer thread of the tension rod and whereby the rod seal is located within a nut extension, which joins the inner nut thread.
The design of the sealing nut as a lock nut does not only serve as simple and effective attachment of the sealing nut but also ensures retention of the threaded connection between the tension rod and the anchor head.
According to another design of the innovative idea, the attachment of the sealing nut is accomplished in that it is screwed to the outer thread of the anchor head.
REFERENCES:
patent: 3040796 (1962-06-01), Gouverneur, II
patent: 3156323 (1964-11-01), Boyer, Sr.
patent: 3390900 (1968-07-01), McCormick et al.
patent: 3915478 (1975-10-01), Al et al.
patent: 4003669 (1977-01-01), Fenske et al.
patent: 4355200 (1982-10-01), Wheeler et al.
patent: 5188473 (1993-02-01), Danz
patent: 5221113 (1993-06-01), Stoll
patent: 5961160 (1998-10-01), Frohlich
patent: 6071052 (2000-06-01), Kerr
patent: 86 02 266 (1986-03-01), None
patent: 2 130 020 (1972-11-01), None
Burns Doane Swecker & Mathis L.L.P.
DEHA Ankersysteme GmbH & Co. KG
Kim Harry C.
LandOfFree
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