Patent US2842974A successfully refreshed from Google Patents.
Patent US3865232A successfully refreshed from Google Patents.
US3865232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plow scraper for conveyor belts
Assignee: HEWITT-ROBINS CORP
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Filing: 1973-09-11
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Granted: 1975-02-11
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Expires: 1993-09-11
Abstract
Abstract A plow scraper for removing debris, such as dirt, mud and fine particles, adhering to the surface of a conveyor belt. Scraper includes a V-shaped metal frame, a depending flexible strip for each arm of the frame, a resilient scraper blade for each arm of the frame, and securing means extending through aligned apertures in the blades, and the frame so that the blades can be removed and replaced, when worn. Frame is secured for pivotal movement to a shaft that extends laterally across the belt, and the shaft, in turn, is joined to the framework of the conveyor at opposite sides of the belt. Roller is secured to frame so that resilient blades are pressed into contact with surface of belt to skim debris therefrom as belt is driven therebelow. Roller always projects beneath metal frame as the conveyor is driven past the plow scraper. When the scraper blades are worn, the roller enables the plow scraper to ride over the belt and the debris adhered thereto without causing the frequently encountered metalto-metal and/or metal to belt engagement between the metal frame and the heavy duty staples that are used to join lengthy sections of conveyor belting or the belting itself. Consequently, the service life of the conveyor belt is increased substantially.
Inventors
- 👤 William E Koenig
- 👤 James T Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:12
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/74; B65G47/76; B65G47/763; B65G45/00; B65G45/10; B65G45/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
228 words
In combination, a conveyor belt, a supporting framework situated on opposite sides of the belt and extending parallel thereto, a scraper assembly secured to said framework at opposite sides of the belt and means for advancing the belt relative to the scraper assembly, said assembly comprising: a. a V-shaped metal frame disposed with its apex extending along the longitudinal center line of the belt and with its sides extending from said apex rearwardly in the direction of belt travel and outwardly towards the sides of the belt; b. means for mounting said frame for pivotal movement about an axis extending laterally across the belt; c. resilent scraper blade means secured to said sides of said metal frame and extending therebelow so as to contact the belt surface and skim debris therefrom: and d. roller means secured to said metal frame for pivoting said metal frame downwardly to urge said blade means into contact with the surface of the belt, said roller means extending below bottom edge of said frame but being normally out of contact with the belt surface such that as said scraper blade means wears due to its coaction with the belt surface and any debris that said roller will approach the belt surface and will contact the belt surface before said metal frame does to thus prevent said metal frame from damaging the belt surface.
Claim 2
Dependent Claim
228 words
In combination, a conveyor belt, a supporting framework situated on opposite sides of the belt and extending parallel thereto, a scraper assembly secured to said framework at opposite sides of the belt and means for advancing the belt relative to the scraper assembly, said assembly comprising: a. a V-shaped metal frame disposed with its apex extending along the longitudinal center line of the belt and with its sides extending from said apex rearwardly in the direction of belt travel and outwardly towards the sides of the belt; b. means for mounting said frame for pivotal movement about an axis extending laterally across the belt; c. resilent scraper blade means secured to said sides of said metal frame and extending therebelow so as to contact the belt surface and skim debris therefrom: and d. roller means secured to said metal frame for pivoting said metal frame downwardly to urge said blade means into contact with the surface of the belt, said roller means extending below bottom edge of said frame but being normally out of contact with the belt surface such that as said scraper blade means wears due to its coaction with the belt surface and any debris that said roller will approach the belt surface and will contact the belt surface before said metal frame does to thus prevent said metal frame from damaging the belt surface.
Claim 3
Dependent Claim
20 words
The combination as defined in claim 1 wherein said blade is disposed intermediate said frame and a back up bar.
Claim 4
Dependent Claim
37 words
The combination of claim 1 wherein said roller means is secured to the sides of the metal frame rearwardly of the apex of the frame and parallel to the means for mounting said frame for pivotal movement.
Claim 5
Dependent Claim
41 words
The combination as defined in claim 1 wherein each resilient blade is joined to the frame by fastening means which are passed through aligned apertures in the blade and frame, thus allowing the blades to be removed and replaced when worn.
Claim 6
Dependent Claim
36 words
The combination as defined in claim 1 wherein said means for mounting said frame includes a shaft secured to the free ends of said frame, and U bolts for receiving therein the ends of said shaft.
Claim 7
Dependent Claim
20 words
The combination as defined in claim 1 wherein said scraper assembly can be removed, as a unit, from said framework.
Claim 8
Dependent Claim
188 words
A scraper assembly for removing debris and the like from the surface of a conveyor belt, said assembly comprising: a. a V-shaped metal frame adapted for disposition with its apex projecting along the longitudinal center line of a conveyor belt, and with its sides extending rearwardly from said apex in the direction of travel of the conveyor belt, and outwardly therEfrom towards the sides of the conveyor belt; b. means mounting said frame for pivotal movement; c. resilent scraper blade means secured to said sides of said metal frame and normally extending below said metal frame a predetermined distance; and d. spacer means secured to said metal frame to urge said metal frame downwardly and said resilent scraper blade means into contact with the surface of a conveyor belt when disposed in proximity thereto such that debris and the like will be removed from the conveyor belt; e. said spacer means extending below said metal frame but less then said predetermined distance to co-operate with the conveyor belt and prevent said metal frame from contacting the conveyor belt in case said resilent scraper blade means should wear down.
Claim 9
Dependent Claim
188 words
A scraper assembly for removing debris and the like from the surface of a conveyor belt, said assembly comprising: a. a V-shaped metal frame adapted for disposition with its apex projecting along the longitudinal center line of a conveyor belt, and with its sides extending rearwardly from said apex in the direction of travel of the conveyor belt, and outwardly therEfrom towards the sides of the conveyor belt; b. means mounting said frame for pivotal movement; c. resilent scraper blade means secured to said sides of said metal frame and normally extending below said metal frame a predetermined distance; and d. spacer means secured to said metal frame to urge said metal frame downwardly and said resilent scraper blade means into contact with the surface of a conveyor belt when disposed in proximity thereto such that debris and the like will be removed from the conveyor belt; e. said spacer means extending below said metal frame but less then said predetermined distance to co-operate with the conveyor belt and prevent said metal frame from contacting the conveyor belt in case said resilent scraper blade means should wear down.
Claim 10
Dependent Claim
52 words
The scraper assembly as defined in claim 7 wherein said resilent scraper blade means is located between a back-up bar and said metal frame, and openings are formed in said blade means, said back-up bar, and said frame and fastening means coacting therewith provide for removal and replacement of said blade means.
Claim 11
Dependent Claim
41 words
The scraper assembly as defined in claim 7 wherein said means mounting said frame for pivotal movement also provides for a floating movement thereof in a direction away from and towards a conveyor belt when said frame is in proximity thereto.
Claim 12
Dependent Claim
40 words
The scraper assembly of claim 7 wherein said spacer means includes a roller secured to the sides of the metal frame rearwardly of the apex of the frame and parallel to the means for mounting said frame for pivotal movement.
References Cited (Backward Citations)
US3414116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |