Patent US4000809A successfully refreshed from Google Patents.
US4000809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular belt conveyor
Assignee: Sintab Swedinventor AB
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Filing: 1974-12-10
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Granted: 1977-01-04
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Expires: 1994-12-10
Abstract
Abstract A conveyor having a tubular endless belt with lateral beads to be engaged by drive and idler pulleys and with clip springs to load the longitudinal edges of the belt into abutting relationship. In order to supply and discharge material respectively to and from the hollow space of the conveyor at desired locations along the conveyor path stationary pressure rollers separate the longitudinal edges of the belt against the bias of the clip springs. Alternatively, power can be used to separate the longitudinal edges of the belt, the power having pulleys engageable with the beads of the belt. To facilitate the discharge of material from the conveyor guide rollers provide a convex bight in the belt along the inner run thereof immediately ahead of the discharge location.
Inventors
- 👤 Bo Nils Konrad Lenntoft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:55
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/08; B65G2201/00; B65G2201/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
112 words
A tubular belt conveyor comprising a plurality of pulleys, an endless conveyor belt running over the pulleys and which is formed to a tubular profile and the longitudinal edges of which converge substantially rectilinearly to one another on the inner run of the endless loop formed by the conveyor belt and are applicable against one another at the longitudinal conveyor belt edges, wherein the conveyor belt is provided with spring clip means to elastically yieldingly load the longitudinal conveyor belt edges into abutting relationship and in which beads having the shape of V-belts are disposed on the sides of the tubular profile to establish engagement of the conveyor belt with the pulleys.
Claim 2
Dependent Claim
112 words
A tubular belt conveyor comprising a plurality of pulleys, an endless conveyor belt running over the pulleys and which is formed to a tubular profile and the longitudinal edges of which converge substantially rectilinearly to one another on the inner run of the endless loop formed by the conveyor belt and are applicable against one another at the longitudinal conveyor belt edges, wherein the conveyor belt is provided with spring clip means to elastically yieldingly load the longitudinal conveyor belt edges into abutting relationship and in which beads having the shape of V-belts are disposed on the sides of the tubular profile to establish engagement of the conveyor belt with the pulleys.
Claim 3
Dependent Claim
38 words
A conveyor as claimed in claim 1, wherein a guide is provided for moving the longitudinal edges of the conveyor belt apart against the yielding load exerted by the spring means at some point of the endless loop.
Claim 4
Dependent Claim
50 words
A conveyor as claimed in claim 2, wherein the guide includes guide pulleys for providing a convex bight of the conveyor along the inner run of the endless loop, and pressure rollers placed in conjunction with the convex bight and positioned to engage the longitudinal edges of the conveyor belt.
Claim 5
Dependent Claim
53 words
A conveyor as claimed in claim 2 wherein the guide comprises some of said pulleys, which are spaced on each side of the belt and in contact with the V-shaped beads of the belt so that the longitudinal edges of the conveyor belt are separated when the conveyor belt passes over said pulleys.
Claim 6
Dependent Claim
25 words
A conveyor as claimed in claim 4, wherein the pulleys of said guide are positioned to engage the beads on opposite sides of the belt.
Claim 7
Dependent Claim
29 words
A conveyor as claimed in claim 5, wherein the pulleys of said guide are supported by a device for adjusting said pulleys at different distances relative to each other.
Claim 8
Dependent Claim
110 words
A tubular belt conveyor comprising a plurality of pulleys, an endless conveyor belt running over the pulleys and formed to a tubular profile, the longitudinal edges of said belt converging substantially rectilinearly to one another on the inner run of the endless loop formed by said belt and being applicable against one another at the longitudinal conveyor belt edges and the sides of said conveyor belt having beads in the form of V-belts to be engaged by said pulleys to drive and guide said conveyor belt, characterized in that said conveyor belt is provided with spring clip means to elastically yieldingly load said longitudinal conveyor belt edges into abutting relationship.
Claim 9
Dependent Claim
110 words
A tubular belt conveyor comprising a plurality of pulleys, an endless conveyor belt running over the pulleys and formed to a tubular profile, the longitudinal edges of said belt converging substantially rectilinearly to one another on the inner run of the endless loop formed by said belt and being applicable against one another at the longitudinal conveyor belt edges and the sides of said conveyor belt having beads in the form of V-belts to be engaged by said pulleys to drive and guide said conveyor belt, characterized in that said conveyor belt is provided with spring clip means to elastically yieldingly load said longitudinal conveyor belt edges into abutting relationship.
Claim 10
Dependent Claim
145 words
A tubular belt conveyor comprising an endless conveyor belt which is formed to a tubular profile and the longitudinal edges of which converge substantially rectilinearly to one another on the inner run of the endless loop formed by the conveyor belt and are applicable against one another at the longitudinal conveyor belt edges, spring clip means associated with the conveyor belt to elastically yieldingly load the longitudinal conveyor belt edges into abutting relationship and in which beads having the shape of V-belts are disposed on the sides of the tubular profile to establish engagement of the conveyor belt with pulleys, and a guide disposed on a unit adjustable into different positions along the conveyor belt, said guide being provided for moving the longitudinal edges of the conveyor belt apart against the yielding load exerted by the spring means at some point of the endless loop.
Claim 11
Dependent Claim
145 words
A tubular belt conveyor comprising an endless conveyor belt which is formed to a tubular profile and the longitudinal edges of which converge substantially rectilinearly to one another on the inner run of the endless loop formed by the conveyor belt and are applicable against one another at the longitudinal conveyor belt edges, spring clip means associated with the conveyor belt to elastically yieldingly load the longitudinal conveyor belt edges into abutting relationship and in which beads having the shape of V-belts are disposed on the sides of the tubular profile to establish engagement of the conveyor belt with pulleys, and a guide disposed on a unit adjustable into different positions along the conveyor belt, said guide being provided for moving the longitudinal edges of the conveyor belt apart against the yielding load exerted by the spring means at some point of the endless loop.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |