US3924729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt conveyor weighing system
Assignee: Flintab AB
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Filing: 1974-10-08
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Granted: 1975-12-09
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Expires: 1994-10-08
Abstract
Abstract Material carried by a conveyor belt is weighed through the use of a single load cell. The conveyor belt is associated with the load cell so that relative movement can occur therebetween, and side forces or twisting moments applied to the load cell are minimized. Specifically, a roller assembly, over which the belt is trained, is associated with the load cell in a manner to permit shifting of the roller assembly in directions transverse to the path of movement of the belt and also to permit oscillatory movement of the roller assembly about an axis parallel to the path of movement of the belt.
Inventors
- 👤 Rune Flinth
- 👤 Kjell Nordstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:41
CPC Classifications
G; G01; G01G; G01G11/00; G01G11/04; G01G11/003; Y; Y10; Y10S; Y10S177/00; Y10S177/09
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
Weighing apparatus comprising a movable conveyor adapted to carry material through a weighing station to be weighed thereat, a single load cell at said weighing station for providing a signal indicative of the weight of the material as it is conveyed by said conveyor, means interposed between said conveyor and said single load cell to transmit a force indicative of the weight of the material to the single load cell, said means interposed between said conveyor and said single load cell including means for enabling relative movement to occur between said conveyor and said single load cell in directions transverse to the direction of movement of said conveyor.
Claim 2
Dependent Claim
108 words
Weighing apparatus comprising a movable conveyor adapted to carry material through a weighing station to be weighed thereat, a single load cell at said weighing station for providing a signal indicative of the weight of the material as it is conveyed by said conveyor, means interposed between said conveyor and said single load cell to transmit a force indicative of the weight of the material to the single load cell, said means interposed between said conveyor and said single load cell including means for enabling relative movement to occur between said conveyor and said single load cell in directions transverse to the direction of movement of said conveyor.
Claim 3
Dependent Claim
45 words
Weighing apparatus as defined in claim 1 wherein said means interposed between said conveyor and said single load cell includes means for enabling said conveyor and said single load cell to relatively pivot about an axis parallel to the path of movement of said conveyor.
Claim 4
Dependent Claim
83 words
Weighing apparatus as defined in claim 2 further including roller members which extend generally transversely to the path of movement of the conveyor and support said conveyor during movement, at least one roller which supports said conveyor at said weighing station, a frame means supporting said at least one roller member, and said frame means being supported by said single load cell for movement in directions transverse to the path of movement of said conveyor and about an axis parallel to said conveyor.
Claim 5
Dependent Claim
22 words
Weighing apparatus as defined in claim 3 wherein Said single load cell has a spherical surface engaging and supporting said frame means.
Claim 6
Dependent Claim
31 words
weighing apparatus as defined in claim 3 wherein said load cell comprises a shear-beam type load cell and a universal connection between said shear-beam type load cell and said frame means.
Claim 7
Dependent Claim
23 words
Weighing apparatus as defined in claim 1 further including means for preventing movement of said frame means in the direction of belt movement.
Claim 8
Dependent Claim
138 words
Weighing apparatus comprising a movable conveyor adapted to carry material through a weighing station to be weighed thereat, load cell means at said weighing station for providing a signal indicative of the weight of the material as it is conveyed by said conveyor, means interposed between said conveyor and said load cell means to transmit a force indicative of the weight of the material to the load cell, said means interposed between said conveyor and said load cell including at least one member for quiding said conveyor, a frame for said member and means for supporting said frame on said load cell to enable relative movement to occur therebetween in directions transverse to the direction of conveyor movement and for enabling relative pivotal movement to occur about an axis parallel to the path of movement of said conveyor.
Claim 9
Dependent Claim
138 words
Weighing apparatus comprising a movable conveyor adapted to carry material through a weighing station to be weighed thereat, load cell means at said weighing station for providing a signal indicative of the weight of the material as it is conveyed by said conveyor, means interposed between said conveyor and said load cell means to transmit a force indicative of the weight of the material to the load cell, said means interposed between said conveyor and said load cell including at least one member for quiding said conveyor, a frame for said member and means for supporting said frame on said load cell to enable relative movement to occur therebetween in directions transverse to the direction of conveyor movement and for enabling relative pivotal movement to occur about an axis parallel to the path of movement of said conveyor.
Claim 10
Dependent Claim
33 words
Weighing apparatus as defined in claim 7 wherein said one member comprises at least one roller extending generally transversely to the path of movement of the conveyor, and said frame supports said roller.
Claim 11
Dependent Claim
23 words
Weighing apparatus as defined in claim 8 wherein means is provided for preventing movement of said frame in directions longitudinally of said conveyor.
Claim 12
Dependent Claim
26 words
Weighing apparatus as defined in claim 8 wherein said roller assembly comprises a plurality of rollers extending transverse of the direction of movement of said belt.
Claim 13
Dependent Claim
17 words
Weighing apparatus as defined in claim 7 wherein said load cell means comprises a single load cell.
Claim 14
Dependent Claim
21 words
Weighing apparatus as defined in claim 7 wherein said load cell means comprises a single load cell of the shear-beam type.
References Cited (Backward Citations)
US2793851A
Cited
US3339650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |