US5107982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor apparatus
Assignee: SHUTTLEWORTH Inc 10 COMMERCIAL RD HUNTINGTON IN 46750-9044 A CORP OF
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Filing: 1991-01-25
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Granted: 1992-04-28
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Expires: 2011-01-25
Abstract
Abstract A roller conveyor apparatus includes a plurality of tapered tubular rollers, each rotatably mounted on an axle. The roller axles are supported by a frame so that, in one embodiment, the rollers are arranged to form a conveyor turn segment. A drive wheel, also mounted on the axle, is associated with each roller to provide a friction surface operating against one end of the roller for rotation of the roller. A spring load assembly at the other end of the roller controls the frictional contact between the roller and the drive wheel. The drive wheel for each of the plurality of rollers is driven by a friction drive assembly including a sprocket horizontally supported beneath the drive wheel. A drive tire is mounted on the sprocket so that the tire surface contacts the drive wheel. A chain, driven by a single motor and drive sprocket, engages the sprocket of each friction drive assembly to rotate the sprocket, and therefore the drive tire. The frictional contact between the drive tire and the drive wheel causes the drive wheel to also rotate. The frictional contact between the drive wheel and the roller, and between the drive tire and the drive wheel, provide two torque limiting features for the roller conveyor apparatus of one embodiment of the invention. In one embodiment, the drive wheel is press-fit onto the axle so that the axle rotates with the drive wheel. Axle rotation provides an additional driving force to the rollers through bushings engaged with the rollers.
Inventors
- 👤 Brian D. Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:08
CPC Classifications
B; B65; B65G; B65G13/00; B65G13/02; B65G13/06; B65G13/071
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
252 words
A roller conveyor apparatus for conveying articles thereon, the apparatus comprising: a plurality of roller assemblies, each of said roller assemblies including; an elongated roller having a longitudinal axis; and means, including a first friction surface, for rotating said roller about said longitudinal axis; means for rotatably supporting each of said roller assemblies so that said roller of each of said roller assemblies form a continuous path for conveying articles thereon; a plurality of friction drive assemblies, one of said drive assemblies being associated with one of said plurality of roller assemblies, each of said plurality of friction drive assemblies including; a driven member having a second friction surface; and means for rotatably supporting said driven member so that said second friction surface is in frictional contact with said first friction surface of said one of said plurality of roller assemblies, whereby rotation of said driven member is frictionally transmitted to rotation of said means for rotating said roller through said frictional contact; and means for driving said driven member of each of said plurality of friction drive assemblies, wherein said means for rotating said roller includes: an axle supporting said elongated roller along said longitudinal axis; a drive wheel having a circumferential face forming said first friction surface and an end face having a third friction surface; and means for rotatably mounting said drive wheel on said axle adjacent one end of said elongated roller while maintaining said third friction surface in friction contact with said one end of said roller.
Claim 2
Dependent Claim
252 words
A roller conveyor apparatus for conveying articles thereon, the apparatus comprising: a plurality of roller assemblies, each of said roller assemblies including; an elongated roller having a longitudinal axis; and means, including a first friction surface, for rotating said roller about said longitudinal axis; means for rotatably supporting each of said roller assemblies so that said roller of each of said roller assemblies form a continuous path for conveying articles thereon; a plurality of friction drive assemblies, one of said drive assemblies being associated with one of said plurality of roller assemblies, each of said plurality of friction drive assemblies including; a driven member having a second friction surface; and means for rotatably supporting said driven member so that said second friction surface is in frictional contact with said first friction surface of said one of said plurality of roller assemblies, whereby rotation of said driven member is frictionally transmitted to rotation of said means for rotating said roller through said frictional contact; and means for driving said driven member of each of said plurality of friction drive assemblies, wherein said means for rotating said roller includes: an axle supporting said elongated roller along said longitudinal axis; a drive wheel having a circumferential face forming said first friction surface and an end face having a third friction surface; and means for rotatably mounting said drive wheel on said axle adjacent one end of said elongated roller while maintaining said third friction surface in friction contact with said one end of said roller.
Claim 3
Dependent Claim
57 words
The roller conveyor apparatus of claim 1, wherein: said driven member includes a driven sprocket; and said means for driving includes: a drive motor; a drive sprocket rotatably engaged to said drive motor; and a drive chain engaged between said drive sprocket and said driven sprocket of at least one of said plurality of friction drive assemblies.
Claim 4
Dependent Claim
37 words
The roller conveyor apparatus of claim 2, wherein: said driven sprocket includes several circumferentially disposed teeth; and said drive chain engages at least one of said several teeth in a contact arc of less than approximately 90°.
Claim 5
Dependent Claim
67 words
The roller conveyor apparatus of claim 1, wherein said means for rotating said roller further includes means for varying said friction contact between said third friction surface and said one end of said roller, thereby varying the amount of torque that must be applied between said roller and said drive wheel to cause said third friction surface to slip relative to said one end of said roller.
Claim 6
Dependent Claim
65 words
The roller conveyor apparatus of claim 4, wherein said means for varying the friction contact includes; means for slidably engaging at least one of said roller and said drive wheel on said axle to permit relative motion between said roller and said drive wheel along said longitudinal axis of said roller; means for variably forcing said roller and said drive wheel together along said axis.
Claim 7
Dependent Claim
78 words
The roller conveyor apparatus of claim 5, wherein said means for variably forcing includes: a collar disposed about said axle adjacent the other end of said elongated roller; a spring disposed about said axle between said collar and said other end of said roller; and means for fixing said collar to said axle at varying locations along said axle to vary the amount of compression of said spring between said collar and said other end of said roller.
Claim 8
Dependent Claim
15 words
The roller conveyor apparatus of claim 1, wherein said driven member includes an elastomeric tire.
Claim 9
Dependent Claim
14 words
The roller conveyor apparatus of claim 7, wherein said tire is composed of urethane.
Claim 10
Dependent Claim
17 words
The roller conveyor apparatus of claim 8, wherein said tire is composed of a 92A durometer urethane.
Claim 11
Dependent Claim
30 words
The roller conveyor apparatus of claim 1, wherein said driven member includes: a driven sprocket; and an elastomeric tire engaged to said driven sprocket to rotate with said driven sprocket.
Claim 12
Dependent Claim
15 words
The roller conveyor apparatus of claim 1, wherein said elongated roller is a tapered roller.
Claim 13
Dependent Claim
40 words
The roller conveyor apparatus of claim 1, wherein said means for rotatably supporting said roller assemblies includes means for supporting the ends of said roller of each of said roller assemblies such that said roller assemblies form a curved path.
References Cited (Backward Citations)
US3369646A
Cited
US3724643A
Cited
US3961700A
Cited
US3951255A
Cited
US4006815A
Cited
US4193492A
Cited
US4325474A
Cited
US4221288A
Cited
US4406360A
Cited
US4401208A
Cited
US4488639A
Cited
US4421224A
Cited
US4524861A
Cited
US4815588A
Cited
US4753339A
Cited
US4993541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-28 | 1995-10-28 | 1996-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-28 | 1999-10-28 | 2000-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-28 | 2003-10-28 | 2004-04-28 | $7700.00 | Window Closed / Lapsed |