Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal for other than internal combustion engine – or...
Reexamination Certificate
1998-11-23
2001-06-05
Knight, Anthony (Department: 3626)
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal for other than internal combustion engine, or...
C384S448000, C384S489000, C474S199000
Reexamination Certificate
active
06241257
ABSTRACT:
BACKGROUND OF THE INVENTION
It is already known from DE 4,242,293 that a belt pulley can be attached by means of a screw to the pivoting arm of a tensioning device. A sealing disk is clamped between the head of the screw and the lateral surface of the inner ring of the roller bearing to protect the roller bearing against the intrusion of dirt and other solid particles and to serve as a washer for the screw. When the belt pulley is fabricated and transported as a spare part for the known tensioning device or as an independent product for idling purposes, there is the danger that the accompanying screw and the sealing disk can fall out and be lost.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to create a fastening device for a belt pulley which can be transported and handled safely as a compact unit and without the loss of any of the individual parts.
The task is accomplished in that the sealing disk is attached directly to the inner ring both axially and radially. The sealing disk has projections extending into the bore of the inner ring to secure the screw in the axial direction for transport.
By attaching the sealing disk independently to the inner ring and the screw independently to the sealing disk, the invention creates a transport assembly which does not require any additional parts and does not lead to any significant extra expense. Sealing disk, screw, and pulley form a compact unit. The screw can turn freely but is secured in the axial direction.
REFERENCES:
patent: 5421788 (1995-06-01), Toth
patent: 5964674 (1999-10-01), Serkh
patent: 5993343 (1999-11-01), Rocca et al.
patent: 6059679 (2000-05-01), Tsutsui et al.
patent: 4242293A1 (1992-12-01), None
Hauck Helmut
Plössl Deiter
Stolz Robert
Stoyke Bettina
Knight Anthony
Peavey Enoch E
Renz, Jr. , PC Eugene E.
SKF GmbH
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