Patent US4944386A successfully refreshed from Google Patents.
US4944386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraper for conveyor belts
Assignee: Martin Engineering Co
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Filing: 1990-01-08
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Granted: 1990-07-31
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Expires: 2010-01-08
Abstract
Abstract A mechanism for removing material from the surface of a conveyor belt which includes a blade adapted to be positioned in engagement with the conveyor belt surface, a plurality of tethers each having one end attached to the rigid frame of the conveyor mechanism and having the other end attached to the blade for securing the blade in position relative to the conveyor belt while allowing the blade to move in a vertical direction in response to vertical deflections of the conveyor belt, and a container attached to the blade for receiving and confining varying amounts of a ballast material, whereby the ballast material urges the blade into engagement with the conveyor belt with a force dependent upon the mass of the ballast in the container.
Inventors
- 👤 Robert T. Swinderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:36
CPC Classifications
B; B65; B65G; B65G45/00; B65G45/10; B65G45/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
107 words
A mechanism for removing material from the surface of a conveyor belt said mechanism including: a blade adapted to be positioned adjacent said conveyor belt surface; means for securing said blade in position relative to said conveyor belt, said securing means allowing said blade to move in a vertical direction in response to vertical deflections of said belt; and ballast container means associated with said blade for receiving varying amounts of a ballast material, whereby the force exerted by said container means and said ballast material urges said blade into engagement with said belt with a force dependent upon the mass of the ballast in said container.
Claim 2
Dependent Claim
107 words
A mechanism for removing material from the surface of a conveyor belt said mechanism including: a blade adapted to be positioned adjacent said conveyor belt surface; means for securing said blade in position relative to said conveyor belt, said securing means allowing said blade to move in a vertical direction in response to vertical deflections of said belt; and ballast container means associated with said blade for receiving varying amounts of a ballast material, whereby the force exerted by said container means and said ballast material urges said blade into engagement with said belt with a force dependent upon the mass of the ballast in said container.
Claim 3
Dependent Claim
25 words
The mechanism of claim 1, wherein said ballast container means includes an aperture for the selective addition or removal of desired quantities of ballast material.
Claim 4
Dependent Claim
17 words
The mechanism of claim 2 wherein said ballast container means includes a tank having a pipe opening.
Claim 5
Dependent Claim
17 words
The mechanism of claim 1 wherein said blade and said container means are made entirely of plastic.
Claim 6
Dependent Claim
11 words
The mechanism of claim 1 wherein said blade is generally linear.
Claim 7
Dependent Claim
21 words
The mechanism of claim 5 wherein said blade is located at an angle to the direction of the conveyor belt travel.
Claim 8
Dependent Claim
26 words
The mechanism of claim 5 wherein said securing means are attached to a rigid frame and are in sliding engagement with the ends of said blade.
Claim 9
Dependent Claim
12 words
The mechanism of claim 7 wherein said securing means include vertical guides.
Claim 10
Dependent Claim
23 words
The mechanism of claim 1 wherein said blade is generally V-shaped, having a first leg and a second leg extending from an apex.
Claim 11
Dependent Claim
34 words
The mechanism of claim 9 wherein said securing means include a plurality of tethers, each said tether being attached at one end to a rigid frame and at the other end to said mechanism.
Claim 12
Dependent Claim
13 words
The mechanism of claim 10 wherein said tethers are comprised of wire rope.
Claim 13
Dependent Claim
25 words
The mechanism of claim 9 wherein said first and second legs of said blade include a substantially vertical scraping portion and a horizontal shelf portion.
Claim 14
Dependent Claim
18 words
The mechanism of claim 12 wherein said container means is attached to said shelf portion of said blade.
Claim 15
Dependent Claim
23 words
The mechanism of claim 13 wherein said scraping portion of said blade is at a 15° angle from perpendicular with said conveyor belt.
References Cited (Backward Citations)
US689881A
Cited
US2709514A
Cited
US2859864A
Cited
US2909273A
Cited
US3017012A
Cited
US3206011A
Cited
US3414116A
Cited
US3642153A
Cited
US3722667A
Cited
US3865232A
Cited
SU582153A1
Cited
US4105109A
Cited
GB2040249A
Cited
SU982994A1
Cited
SU1384494A1
Cited
US4811833A
Cited
US4877122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-30 | 1994-01-29 | 1994-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-30 | 1998-01-29 | 1998-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-30 | 2002-01-29 | 2002-07-31 | $7700.00 | Window Closed / Lapsed |