Refiner disc removal method and device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 9, 1999
Grant Date -
N/A
app pub date -
Mar 13, 1998
filing date -
Mar 13, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A refiner disc for a fiber refiner having a refiner disc removal device that is integral with and retained by the disc during refiner operation. The removal device includes a biasing element that is extended from the disc against its mounting surface to urge the disc away from the mounting surface. In its preferred embodiment, the biasing element is a threaded removal plug in a threaded hole in the disc. The plug preferably is of one-piece, unitary and headless construction, engaged by a tool during removal, and is no longer than the disc cross section. The hole is spaced from disc mounting bores, can be offset from the center of the disc to increase mechanical advantage during removal, and has a shoulder adjacent a refining surface of the disc for preventing the plug from backing out of the disc during refiner operation. With the mounting bolts loosened or removed, the plug is engaged by the tool and rotated to displace it relative to the disc such that a portion of the plug bears against the mounting surface. Threaded engagement between the plug and the disc or a plug carrier mounted in the disc urges the disc away from the mounting surface as the plug is further rotated until the disc breaks free. Thereafter, the disc can be manually removed.
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