Patent US3875803A successfully refreshed from Google Patents.
US3875803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment for sampling bulk material
Assignee: Birtley Engineering Ltd
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Filing: 1973-09-05
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Granted: 1975-04-08
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Expires: 1993-09-05
Abstract
Abstract The invention relates to equipment for sampling bulk material as it falls in a stream and comprises a sample container adapted to be moved through the stream and to collect a sample therefrom, a discharge door in the sample container normally held in a closed position by resilient means, and a sample collection chute movable to and from a position in which it may collect a sample from the sample container, the chute being adapted to engage and open the discharge door as it moves to the position in which it may collect a sample from the sample container.
Inventors
- 👤 William Michael Clewlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:35
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
Equipment for sampling bulk material as it falls in a stream comprising a sample container movable through the stream in such a manner as to collect a sample therefrom, a discharge door in the sample container, resilient means carried by the sample container acting to hold the discharge door in a closed position, and a sample collection chute movable to and from a position in which it may collect a sample from the sample container, the chute being adapted to engage and open the discharge door against the action of the resilient means as it moves to the position in which it may collect a sample from the sample container.
Claim 2
Dependent Claim
110 words
Equipment for sampling bulk material as it falls in a stream comprising a sample container movable through the stream in such a manner as to collect a sample therefrom, a discharge door in the sample container, resilient means carried by the sample container acting to hold the discharge door in a closed position, and a sample collection chute movable to and from a position in which it may collect a sample from the sample container, the chute being adapted to engage and open the discharge door against the action of the resilient means as it moves to the position in which it may collect a sample from the sample container.
Claim 3
Dependent Claim
27 words
Equipment according to claim 1 wherein the sample container is mounted for pivotal movement and is adapted to move pivotally to and from its sample collection position.
Claim 4
Dependent Claim
60 words
Equipment according to claim 1 wherein the sample container is mounted on a pair of spaced arms, which arms are mounted for pivotal movement about a pivot axis for movement of the sample container along an arcuate path, and the sample collection chute when not in its sample collection position lies clear of the arcuate path of the sample container.
Claim 5
Dependent Claim
23 words
Equipment according to claim 3 wherein the pair of spaced arms and the sample collection chute are pivotally mounted on a base frame.
Claim 6
Dependent Claim
22 words
Equipment according to claim 4 wherein the pair of spaced arms are mounted on a shaft rotatably mounted on the base frame.
Claim 7
Dependent Claim
32 words
Equipment according to claim 5 wherein a driving wheel mounted on the shaft is adapted to impart rotary movement to the shaft and thereby pivotal movement to the pair of spaced arms.
Claim 8
Dependent Claim
46 words
Equipment according to claim 5 wherein a flexible transmission member engages the periphery of the driving wheel and at least one linear actuator is connected to the flexible transmission member and is adapted to move the flexible transmission member to impart rotary movement to the shaft.
Claim 9
Dependent Claim
56 words
Equipment according to claim 1 wherein the sample collection chute carries a cam surface and the discharge door carries a cam follower whereby engagement of the cam follower with the cam surface opens the discharge door as the sample collection chute moves to the position in which it may collect a sample from the sample container.
Claim 10
Dependent Claim
20 words
Equipment according to claim 1 wherein a hydraulic linear actuator is arranged and adapted to move the sample collection chute.
Claim 11
Dependent Claim
24 words
Equipment according to claim 1 wherein the discharge door is hingedly connected to the sample container and the resilient means is a torsion spring.
References Cited (Backward Citations)
US2727390A
Cited
US2977800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |