US3786549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article of manufacture
Assignee: Precismeca Gesellschaft fuer Foerdertechnik mbH
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Filing: 1971-11-11
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Granted: 1974-01-22
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Expires: 1991-11-11
Abstract
Abstract A roller for use in conveyors has a roller body composed of a core part and an outer part which surrounds the core part. Either both parts or at least the outer part is composed of cellular synthetic plastic material which may be of the rigid type or of the elastically yieldable type.
Inventors
- 👤 R Pott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:07
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/02; B65G39/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
150 words
A roller arrangement for use in conveyors comprising, in combination, an elongated roller body composed of rigid foamed synthetic plastic material, said roller body having a peripheral surface, opposite axial ends, a central passage with an inner surface and of predetermined diameter, and inwardly extending recesses at said opposite axial ends of a diameter larger than said predetermined diameter; a substantially cylindrical cover of resiliently yieldable plastic foam material covering and firmly adhering to said peripheral surface of said roller body; a shaft having a diameter smaller than said predetermined diameter extending through said passage and having ends projecting beyond the corresponding axial ends of said roller body; and bearing means provided in said recesses and rotatably supporting said shaft with the axis thereof extending substantially coaxially with the axis of said elongated roller body so that intermediate said bearing means said shaft is inwardly spaced from said inner surface.
Claim 2
Dependent Claim
150 words
A roller arrangement for use in conveyors comprising, in combination, an elongated roller body composed of rigid foamed synthetic plastic material, said roller body having a peripheral surface, opposite axial ends, a central passage with an inner surface and of predetermined diameter, and inwardly extending recesses at said opposite axial ends of a diameter larger than said predetermined diameter; a substantially cylindrical cover of resiliently yieldable plastic foam material covering and firmly adhering to said peripheral surface of said roller body; a shaft having a diameter smaller than said predetermined diameter extending through said passage and having ends projecting beyond the corresponding axial ends of said roller body; and bearing means provided in said recesses and rotatably supporting said shaft with the axis thereof extending substantially coaxially with the axis of said elongated roller body so that intermediate said bearing means said shaft is inwardly spaced from said inner surface.
Claim 3
Dependent Claim
50 words
An arrangement as defined in claim 1, wherein said rigid foamed material is closed-cell polyurethane, and said resiliently yieldable foam material is polyurethane homogeneously foamed onto said peripheral surface so as to firmly adhere thereto, said cover having an outer circumferential surface defining a bearing surface for said roller arrangement.
Claim 4
Dependent Claim
15 words
An arrangement as defined in claim 1, wherein said rigid material is closed-cell two-component polyurethane.
Claim 5
Dependent Claim
15 words
An arrangement as defined in claim 1, wherein said rigid material is a duromeric plastic.
Claim 6
Dependent Claim
26 words
An arrangement as defined in claim 1, said cover having an outer circumferential surface provided with at least one circumferential annular bead of elastically yieldable material.
Claim 7
Dependent Claim
24 words
An arrangement as defined in claim 5, wherein said bead is of one piece with and of the same material as said outer part.
Claim 8
Dependent Claim
28 words
An arrangement as defined in claim 1, said cover having an outer circumferential surface provided with a plurality of at least substantially uniformly axially spaced raised annular beads.
Claim 9
Dependent Claim
19 words
An arrangement as defined in claim 5, wherein said cover has a radial thickness of at least 15 mm.
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |