US3687272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator, especially for the vertical conveying of granular or pulverulent materials
Assignee: Buehler AG
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Filing: 1970-12-10
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Granted: 1972-08-29
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Expires: 1990-12-10
Abstract
Abstract There is disclosed an elevator construction, especially for vertically conveying granular or pulverulent materials, wherein at least one endless conveying member with entrainment elements for the material secured thereto is continuously conveyed and passes through a conveying path surrounded by a conveying shaft or chute, over the upper end of which there is arranged an ejection hood or the like. According to the invention, the entrainment elements are constructed to possess a substantially funnel-shaped configuration, are open at both the top and bottom, and wherein the cross-section of each entrainment element, viewed in the direction of material conveying, widens at all sides. Further, the width of the ejection hood measured transverse to the direction or path of movement of the conveying member is greater than the width of the conveying shaft or chute.
Inventors
- 👤 Edwin B Eisenegger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:59
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/30; B65G17/32; B65G17/36; B65G17/365; B65G2201/00; B65G2201/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
186 words
An elevator, especially for the substantial vertical conveying of granular or pulverulent materials, comprising at least one endless conveying member, material-entrainment elements, means for attaching said entrainment elements to said conveying member, said conveying member together with said entrainment elements continuously moving through a material conveying path, a conveying chute means surrounding said conveying path, means for displacing said conveying member with its attached entrainment elements through said conveying path, said conveying chute means having an upper end portion, material ejector hood means disposed over said upper end portion of said conveying chute means and spaced laterally outwardly from said conveying chute means, each of said entrainment elements possessing a laterally closed substantially funnel-shaped configuration and being open at its upper and lower ends in the direction of said conveying path, the cross-sectional area of each entrainment element, viewed in the direction of conveying of the material, widening laterally to all sides, and the width of said material ejector hood means measured in a direction transverse to the direction of movement of the conveying member is considerably greater than the width of the conveying chute means.
Claim 2
Dependent Claim
186 words
An elevator, especially for the substantial vertical conveying of granular or pulverulent materials, comprising at least one endless conveying member, material-entrainment elements, means for attaching said entrainment elements to said conveying member, said conveying member together with said entrainment elements continuously moving through a material conveying path, a conveying chute means surrounding said conveying path, means for displacing said conveying member with its attached entrainment elements through said conveying path, said conveying chute means having an upper end portion, material ejector hood means disposed over said upper end portion of said conveying chute means and spaced laterally outwardly from said conveying chute means, each of said entrainment elements possessing a laterally closed substantially funnel-shaped configuration and being open at its upper and lower ends in the direction of said conveying path, the cross-sectional area of each entrainment element, viewed in the direction of conveying of the material, widening laterally to all sides, and the width of said material ejector hood means measured in a direction transverse to the direction of movement of the conveying member is considerably greater than the width of the conveying chute means.
Claim 3
Dependent Claim
38 words
The elevator as defined in claim 1, wherein each of said entrainment elements comprises an inwardly directed trough means bounded at least at three sides by the exterior surface of the laterally closed periphery of said entrainment elements.
Claim 4
Dependent Claim
37 words
The elevator as defined in claim 2, wherein a reinforcing member extends between the furthest inwardly directed side of said trough means and the adjacent oppositely situated portion of said laterally enclosed periphery of said entrainment element.
Claim 5
Dependent Claim
25 words
The elevator as defined in claim 2, wherein said reinforcement member is inclined in roof-like fashion viewed in the direction of conveying of the material.
Claim 6
Dependent Claim
120 words
The elevator as defined in claim 1, wherein said conveying member incorporates a pair of spaced conveyor runs forming therebetween an intermediate space, each of said entrainment elements being laterally bounded by a peripheral wall which at least at one location of its circumference is inwardly directed towards the interior of said funnel-shaped entrainment element for forming trough means which are continuous in the direction of conveying of the material, said attaching means for said entrainment elements cooperating at the region of said trough means for securing each said entrainment element at the interior of said trough means with said conveying member, each said entrainment element engaging into the intermediate space formed between both conveyor runs of said conveying member.
Claim 7
Dependent Claim
64 words
The elevator as defined in claim 5, wherein said trough means is substantially symmetrical with respect to its direction of return towards the interior of the corresponding entrainment element, and wherein the plane of symmetry of said trough means is located at least approximately in a symmetry plane of the entrainment element which is substantially parallel to the direction of conveying of the material.
Claim 8
Dependent Claim
38 words
The elevator as defined in claim 1, wherein the point of attachment of each entrainment element with said conveying member is located at least approximately along a line extending through the centers of gravity of said entrainment elements.
Claim 9
Dependent Claim
34 words
The elevator as defined in claim 1, wherein each entrainment element possesses a peripheral wall which, viewed in the dirEction of conveying of the material, possesses essentially the shape of an inverted truncated pyramid.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |