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US3753541A
Expired / Lapsed
US
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Cargo roller assembly
Assignee: McDonnell Douglas Corp
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Filing: 1971-09-02
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Granted: 1973-08-21
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Expires: 1991-09-02
Abstract
Abstract A roller assembly for use when a high strength to weight ratio is required. The assembly includes a roller shell with internal stiffening ribs and a crown of a predetermined curvature. The shell is swaged over hubs at each end thereof, the hubs including low friction bearings for connection to a roller shaft.
Inventors
- 👤 R Grueber
- 👤 R Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:09
CPC Classifications
B; B64; B64D; B64D9/00; B64D2009/006; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49544; Y10T29/49547; Y10T29/49556
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
A cargo roller assembly for use in aircraft where a high strength to weight ratio is desirable, said assembly including a first roller having: a generally cylindrical roller shell having opposite end portions, an outer curved surface having a predetermined longitudinal cross-sectional radius, said radius being large in comparison to the circumferences of said roller, an inner cylindrical surface, and longitudinal integral stiffening ribs extending from said inner cylindrical surface at equally spaced locations thereabout, said ribs being centrally located within said shell and having shaped end portions within said shell; and a pair of hub members positioned in said shell, each of said hub members having an outer cylindrical surface which mates with said inner cylindrical surface of said shell, a curved back side surface adapted to abut said shaped end portions of said ribs, an outer side surface, an outer curved surface between said outer cylindrical surface and said outer side surface and means to support bearing means centraly therein, said shell end portions being deformed over said hub outer curved surfaces to retain said hub members in said shell.
Claim 2
Dependent Claim
182 words
A cargo roller assembly for use in aircraft where a high strength to weight ratio is desirable, said assembly including a first roller having: a generally cylindrical roller shell having opposite end portions, an outer curved surface having a predetermined longitudinal cross-sectional radius, said radius being large in comparison to the circumferences of said roller, an inner cylindrical surface, and longitudinal integral stiffening ribs extending from said inner cylindrical surface at equally spaced locations thereabout, said ribs being centrally located within said shell and having shaped end portions within said shell; and a pair of hub members positioned in said shell, each of said hub members having an outer cylindrical surface which mates with said inner cylindrical surface of said shell, a curved back side surface adapted to abut said shaped end portions of said ribs, an outer side surface, an outer curved surface between said outer cylindrical surface and said outer side surface and means to support bearing means centraly therein, said shell end portions being deformed over said hub outer curved surfaces to retain said hub members in said shell.
Claim 3
Dependent Claim
42 words
The assembly defined in claim 1 wherein said hub members each include: a back ring portion on which said curved back side surface is formed, said back ring portion having a thickness about the same distance as the height of said ribs.
Claim 4
Dependent Claim
56 words
The assembly defined in claim 2 wherein said hub members each include: an internal flange smoothly formed by a concave curved surface which extends inwardly from said back ring portion; a front inner cylindrical surface; and anti-friction bearing means, said bearing means being positioned in abutment with said internal flange and said front inner cylindrical surface.
Claim 5
Dependent Claim
29 words
The assembly defined in claim 3 wherein said anti-friction bearing means include: self-aligning ball bearings which are staked to said hubs to retain said bearings to said hub members.
Claim 6
Dependent Claim
77 words
The assembly defined in claim 1 including: support means for retaining said shell in a predetermined relationship to the aircraft, said support means including bearings fixedly retained in each of said hub members, a shaft extending through and supporting said bearings, and a structure connected to the Aircraft supporting said shaft, said structure and shaft having predetermined deformation characteristics under load so that a plurality of said rollers will deflect the same amount under the same load.
Claim 7
Dependent Claim
55 words
The assembly defined in claim 5 including at least two other rollers essentially identical to said first roller mounted in said support means so that said shells thereof define a line which cargo can be expected to move along, whereby said predetermined deformation characteristics of said support structure assure said rollers are loaded generally equally.
Claim 8
Dependent Claim
24 words
The assembly defined in claim 1 wherein said roller shell is constructed from aluminum alloy sensitive to the orientation of the metal grains therein.
References Cited (Backward Citations)
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US2263440A
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US2757988A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |