US3815959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Industrial roller or wheel
Assignee: Individual
•
Filing: 1972-08-08
•
Granted: 1974-06-11
•
Expires: 1992-08-08
Abstract
Abstract A roller or wheel particularly adaptable to the elevator and moving stairway industries, as well as other like industrial uses. The roller features an elastomeric tire and a low friction bearing support for the tire constructed and arranged so that the assembly allows the natural movement of the tire material, thus preventing generation of high heat and therefore stands up under long periods of usage and typical industrial loadings. Critical features include a relief zone between the tire and bearing support and a certain interference fit between the elastomeric tire and bearing support which factors coact to prevent heat build-up with resulting destruction of the assembly.
Inventors
- 👤 M Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:05
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/006; B60B33/0063; B60B27/00; B60B27/0005; B60B33/0028; F; F16; F16C; F16C13/00; F16C13/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
177 words
An industrial roller or wheel comprising in combination a solid elastomer tire having a durometer of 85-95 hardness Shore A engageable with a guiding surface during use, a mechanical bearing support means mounted directly in said tire and including an axial bore adapted to receive a shaft, and means forming an annular relief chamber at the interfaces of said tire and bearing support means and near the axial center of the tire, whereby the tire elastomer when compressed by rolling under load may flow naturally and continuously into said annular relief chamber, said bearing support means comprising a ball bearing assembly having a direct interference fit in the bore of the elastomer tire, said tire bore having an undercut cylindrical seat receiving the ball bearing assembly in interference fitting relationship, there being a pair of ball bearing retaining shoulders on the tire immediately outwardly of said seat, and said relief chamber comprising a further undercut annular groove in the bore of the tire at the axial center thereof dividing said seat into two separated annular seat portions.
Claim 2
Dependent Claim
177 words
An industrial roller or wheel comprising in combination a solid elastomer tire having a durometer of 85-95 hardness Shore A engageable with a guiding surface during use, a mechanical bearing support means mounted directly in said tire and including an axial bore adapted to receive a shaft, and means forming an annular relief chamber at the interfaces of said tire and bearing support means and near the axial center of the tire, whereby the tire elastomer when compressed by rolling under load may flow naturally and continuously into said annular relief chamber, said bearing support means comprising a ball bearing assembly having a direct interference fit in the bore of the elastomer tire, said tire bore having an undercut cylindrical seat receiving the ball bearing assembly in interference fitting relationship, there being a pair of ball bearing retaining shoulders on the tire immediately outwardly of said seat, and said relief chamber comprising a further undercut annular groove in the bore of the tire at the axial center thereof dividing said seat into two separated annular seat portions.
Claim 3
Dependent Claim
39 words
The structure of claim 1, and said ball bearing assembly comprising a pair of single row ball bearings whose outer side portions engage the seat portions and whose inner sides project axially across the groove forming said relief chamber.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |