US4489823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraper blade for a belt conveyor
Assignee: PADUCAH BANK AND TRUST COMPANY
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Filing: 1982-08-09
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Granted: 1984-12-25
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Expires: 2002-08-09
Abstract
Abstract An improved scraper blade for use in cleaning particulate conveyed material from a belt conveyor, the blade being mounted on a shaft which extends across the conveyor belt in spaced relation thereto. The scraper blade includes an elongated block of molded elastomer material, mounted on the shaft, which has a leading edge and a trailing edge extending across and in contact with the conveyor belt. The scraper blade surface intermediate its leading and trailing edges has a shallow concavity or pocket, spaced from the belt, in which a limited quantity of particulate conveyed material collects. The collected material itself scrapes the conveyor belt to assist in dislodging particulate matter from the belt.
Inventors
- 👤 James R. Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:23
CPC Classifications
B; B65; B65G; B65G45/00; B65G45/10; B65G45/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
151 words
An improved scraper blade for a scraper employed to scrape particulate conveyed material from a belt conveyor, the scraper being of the kind comprising a scraper shaft having its opposite ends supported in a pair of tensioning supports located at opposite sides of a conveyor belt, the scraper shaft extending across the conveyor belt in spaced relation thereto, the improved scraper blade comprising: an elongated block of molded elastomer material mounted on the scraper shaft, the scraper blade having a leading edge extending across and engaging the conveyor belt at one transverse position and a trailing edge extending across and engaging the conveyor belt at a second transverse position spaced from the first position, the surface of the blade intermediate its leading and trailing edges comprising a shallow concavity spaced from the belt, the depth of the concavity being only sufficient to collect a limited quantity of particulate conveyed material therein.
Claim 2
Dependent Claim
151 words
An improved scraper blade for a scraper employed to scrape particulate conveyed material from a belt conveyor, the scraper being of the kind comprising a scraper shaft having its opposite ends supported in a pair of tensioning supports located at opposite sides of a conveyor belt, the scraper shaft extending across the conveyor belt in spaced relation thereto, the improved scraper blade comprising: an elongated block of molded elastomer material mounted on the scraper shaft, the scraper blade having a leading edge extending across and engaging the conveyor belt at one transverse position and a trailing edge extending across and engaging the conveyor belt at a second transverse position spaced from the first position, the surface of the blade intermediate its leading and trailing edges comprising a shallow concavity spaced from the belt, the depth of the concavity being only sufficient to collect a limited quantity of particulate conveyed material therein.
Claim 3
Dependent Claim
36 words
The scraper blade of claim 1 wherein the belt conveyor extends around a pulley and the radius of curvature of the pulley is greater than the radius of curvature of the concavity of the scraper blade.
Claim 4
Dependent Claim
43 words
The scraper blade of claim 1 further comprising a longitudinal metal reinforcement member embedded in the block of molded elastomer material, and a multiplicity of metal reinforcement elements affixed to the reinforcement member and radiating outwardly toward the scraping surface of the blade.
Claim 5
Dependent Claim
28 words
The scraper blade of claim 1, claim 2, or claim 3 wherein the scraper blade comprises at least two separate blade sections, mounted end-to-end on the scraper shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |