US3568822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyor chain
Assignee: Canada Chain and Forge Co Ltd
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Filing: 1969-01-21
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Granted: 1971-03-09
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Expires: 1989-01-21
Abstract
Abstract A conveyor chain formed of pintle-connected links wherein alternate links of the chain carry elongated roller assemblies having rollers extending longitudinally of the direction of travel of the chain and forming a supporting surface for objects to be transported and wherein each assembly is positioned on its carrying link so as to extend over and thereby be supported by a link immediately in advance of its carrying link when the chain extends in a straight line condition.
Inventors
- 👤 Robert D Conkey
- 👤 Rupert H Clement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:09
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/30; B65G17/32; B65G17/34; B65G17/345; B65G2201/00; B65G2201/02; B65G2207/00; B65G2207/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A conveyor chain having pintle connected links (13), each link having side bars having flat parallel upper and lower surfaces, the chain including: a. roller assemblies (22) mounted on alternate links (13) of the chain; b. each roller assembly including a roller (24) and a base structure (23) in which the roller is mounted for rotation about an axis longitudinally of the chain; and c. each base structure having a flat under surface and being disposed so that its under surface extends over and rests on the upper surfaces of the side bars of a link immediately in advance of the link on which it is mounted so as to be supported by the link in advance when the chain is extended in a straight line.
Claim 2
Dependent Claim
126 words
A conveyor chain having pintle connected links (13), each link having side bars having flat parallel upper and lower surfaces, the chain including: a. roller assemblies (22) mounted on alternate links (13) of the chain; b. each roller assembly including a roller (24) and a base structure (23) in which the roller is mounted for rotation about an axis longitudinally of the chain; and c. each base structure having a flat under surface and being disposed so that its under surface extends over and rests on the upper surfaces of the side bars of a link immediately in advance of the link on which it is mounted so as to be supported by the link in advance when the chain is extended in a straight line.
Claim 3
Dependent Claim
36 words
Structure as defined in claim 1 wherein each supporting baSe is U-shaped having an elongated base portion and upturned end portions, said end portions having an elongated pin extending therebetween upon which the roller is mounted.
Claim 4
Dependent Claim
42 words
Structure as defined in claim 1 wherein the assembly is positioned on its carrying link so that the trailing end of each roller is positioned in advance of the pivotal connection of the link which it is mounted and the link trailing.
References Cited (Backward Citations)
US1641642A
Cited
US1745192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |