US3621982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-energizing brake for roller conveyors
Assignee: Ermanco Inc
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Filing: 1969-01-24
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Granted: 1971-11-23
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Expires: 1989-01-24
Abstract
Abstract A brake for a zero pressure accumulation roller conveyor is disclosed in which a flexible band is disposed against certain individually powered conveyor rollers to apply a self-energizing frictional braking force upon being tensioned by a downstream triggering device.
Inventors
- 👤 Fred J Fleischauer
- 👤 Theodore A Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:34
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/22; B65G47/26; B65G47/261
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
139 words
In a conveyor having a plurality of spaced individually powered rollers having a normal direction of forward rotation and defining a pass line tangent to the upper surfaces of said rollers, a brake comprising in combination, a flexible band disposed adjacent the periphery of one of said powered rollers apart from the pass line, band positioning means for supporting the band against said roller at a predetermined angle of band wrap against the periphery of said roller, selectively operable band tensioning means at one end of said band, and said band being anchored against movement relative to said one roller on an end opposite said band tensioning means, with said anchor resisting the frictional force induced in said band during forward roller rotation and the tensioning means being assisted by said frictional force whereby the braking device is selfenergizing.
Claim 2
Dependent Claim
139 words
In a conveyor having a plurality of spaced individually powered rollers having a normal direction of forward rotation and defining a pass line tangent to the upper surfaces of said rollers, a brake comprising in combination, a flexible band disposed adjacent the periphery of one of said powered rollers apart from the pass line, band positioning means for supporting the band against said roller at a predetermined angle of band wrap against the periphery of said roller, selectively operable band tensioning means at one end of said band, and said band being anchored against movement relative to said one roller on an end opposite said band tensioning means, with said anchor resisting the frictional force induced in said band during forward roller rotation and the tensioning means being assisted by said frictional force whereby the braking device is selfenergizing.
Claim 3
Dependent Claim
117 words
A conveyor comprising in combination, a plurality of spaced individually powered rollers defining a pass line tangent to the upper surfaces of said rollers, a power source, a slippable transmission means connecting each individually powered roller to its respective power source, a brake comprising a flexible band disposed adjacent the periphery of one of said powered rollers apart from the pass line, band positioning means for supporting the band against said roller at a predetermined angle of band wrap against the periphery of said roller, and selectively operable means at one end of said band for tensioning said band to apply a frictional braking force to said power roller and reduce the rotational speed of said roller.
Claim 4
Dependent Claim
117 words
A conveyor comprising in combination, a plurality of spaced individually powered rollers defining a pass line tangent to the upper surfaces of said rollers, a power source, a slippable transmission means connecting each individually powered roller to its respective power source, a brake comprising a flexible band disposed adjacent the periphery of one of said powered rollers apart from the pass line, band positioning means for supporting the band against said roller at a predetermined angle of band wrap against the periphery of said roller, and selectively operable means at one end of said band for tensioning said band to apply a frictional braking force to said power roller and reduce the rotational speed of said roller.
Claim 5
Dependent Claim
120 words
In a conveyor having a plurality of spaced individually powered rollers defining a pass line tangent to the upper surfaces of said rollers, a brake comprising in combination, a flexible band disposed adjacent the periphery of one of said powered rollers apart from the pass line, band positioning means for supporting tHe band against said roller at a predetermined angle, selectively operable means at one end of said band for tensioning said band to apply a frictional braking force to said power roller and reduce the rotational speed of said roller, and means responsive to the presence of a conveyed object at a predetermined position on said pass line downstream of said one roller for operating said band tensioning means.
Claim 6
Dependent Claim
120 words
In a conveyor having a plurality of spaced individually powered rollers defining a pass line tangent to the upper surfaces of said rollers, a brake comprising in combination, a flexible band disposed adjacent the periphery of one of said powered rollers apart from the pass line, band positioning means for supporting tHe band against said roller at a predetermined angle, selectively operable means at one end of said band for tensioning said band to apply a frictional braking force to said power roller and reduce the rotational speed of said roller, and means responsive to the presence of a conveyed object at a predetermined position on said pass line downstream of said one roller for operating said band tensioning means.
Claim 7
Dependent Claim
39 words
Apparatus as defined in claim 3 in which said tensioning means includes a trigger means protruding above the pass line into the path of conveyed objects, said lever being swingable in a downward direction upon encountering a conveyed object.
Claim 8
Dependent Claim
43 words
Apparatus as defined in claim 3 in which said tensioning means includes a trigger roller substantially tangent to the pass line and having a friction-producing surface, and having linkage means for translating rotation of said trigger roller into tensioning movement of said band.
References Cited (Backward Citations)
US1875436A
Cited
US1924899A
Cited
US2194219A
Cited
US3012652A
Cited
US3116823A
Cited
US3255865A
Cited
US3420355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |