Conveyors: power-driven – Conveyor having impinging fluid to feed – shift or discharge... – Having cleaning means
Reexamination Certificate
1999-12-21
2001-10-02
Ellis, Christopher P. (Department: 3651)
Conveyors: power-driven
Conveyor having impinging fluid to feed, shift or discharge...
Having cleaning means
Reexamination Certificate
active
06296105
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to conveyor belts. More specifically, the invention relates to a scraper for maintaining a conveyor belt.
2. Discussion of Related Art
Conveyor belts are used in many industrial applications, such as up-loading mined materials, down-loading hot asphalt and the like. Over the course of use, a conveyor belt often becomes caked with material conveyed by the conveyor belt. Material buildup on a conveyor belt is not desirable for many reasons, not the least of which pertaining to good maintenance practices.
Blade-type cleaners frequently are used to clear a conveyor belt of material that adheres to the conveyor belt surface. A blade type conveyor belt cleaner typically includes an elongated member having an edge that contacts the conveyor belt and chips or shaves off unwanted material remaining on the conveyor belt.
Conveyor belt cleaners frequently work in hostile conditions and are subjected to considerable abrasion not only from be belt, but from residual materials clinging to the belt. Thus, to satisfactorily clean a conveyor belt, a conveyor belt cleaner must be serviced, adjusted and maintained continuously.
Although belt scraper blades are constructed from rugged material, wear is unavoidable. When a blade is worm, it must be replaced However, ascertaining when a blade is sufficiently worn or may continue to perform satisfactory service is not always an easy task. What is needed is a blade that displays wear characteristics to indicate to a belt scraper serviceperson when replacement is appropriate.
Belt scraper blade pressure against the conveyor belt generally is guided by two conflicting principles: (1) maximum scraping of material from the conveyor belt; and (2) minimum wear on the conveyor belt. As the blade wears, less blade contacts the conveyor belt, resulting in less pressure being exerted against the conveyor belt. To maintain generally constant pressure against the conveyor belt, the blade pressure must be adjusted regularly. What is needed is a blade pressure adjustment mechanism that is easy to adjust on a regular basis.
Unfortunately, no conveyor belt scrapers available provide an infinitely rotatably-adjustable and tensionable replaceable blade having visible wear indicia.
SUMMARY OF THE INVENTION
The invention is a belt scraper with an infinitely rotatably-adjustable and tensionable replaceable blade having visible wear indicia.
The invention scrapes material from a conveyer belt so that unwanted residual material on a conveyor belt does not build up on the conveyor belt or fall from the conveyor belt and create a hazard or unkempt appearance. The invention provides for ready blade installation and replacement. The invention provides for ready observation of whether the blade requires replacement. The invention provides for ready adjustment of blade pressure against the conveyor belt to maximize conveyor belt scraping and minimize conveyor belt wear. The invention provides improved elements and arrangements thereof, in an apparatus for the purposes described which are inexpensive, dependable and effective in accomplishing intended purposes of the invention.
An embodiment of a belt scraper constructed according to principles of the invention includes a blade mounted on a blade holder. The blade holder is mounted on a shaft. Each end of the shaft is retained by a pillow block. Each pillow block is mounted on a bracket. Each bracket mounts on a non-moving portion of a conveyor belt frame. The pillow blocks are adjusted to orient the blade relative to and urge the blade against a conveyor belt for optimal debris removal.
These and other features of the invention will be appreciated more readily in view of the drawings and detailed description below.
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Bonk, III William A.
Deuble Mark A.
Dykeme Gossett, PLLC
Ellis Christopher P.
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