Patent US4951457A successfully refreshed from Google Patents.
US4951457A
Expired / Lapsed
US
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Narrow pitch articulated chain and links therefor
Assignee: Individual
•
Filing: 1989-11-08
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Granted: 1990-08-28
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Expires: 2009-11-08
Abstract
Abstract A narrow pitch articulated chain wherein the chain links have a narrow pitch and include a concave bearing surface in the bottom thereof in order to travel around a small diameter nose bar and effect an end transfer of small items from a flat top product transport chain. The pitch of the chain links is 0.625 inches or less, and the radius of the bearing surface and nose bar are both 0.5 inches or less and substantially equal to each other.
Inventors
- 👤 Douglas O. Deal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:46
CPC Classifications
F; F16; F16G; F16G13/00; F16G13/02; F16G13/06; B; B65; B65G; B65G17/00; B65G17/06; B65G17/08; B65G2201/00; B65G2201/02; Y; Y10; Y10S; Y10S59/00; Y10S59/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
In combination a narrow pitch articulated chain for conveying selected items on the top surface thereof and adapted to travel in an endless loop, said chain comprising a plurality of plastic chain links with means for pivotally connecting said links to one another wherein each of said chain links comprises a body member having a greater width than length and a plurality of spaced-apart apertures extending in the widthwise direction or said body member so as to define first and second pivotal axes at the front and rear thereof, and further wherein said first and second pivotal axes of said chain links are spaced-apart about 0.625 inches or less and said chain links each define a concave portion in the bottom surface thereof between said first and second pivotal axes and having a radius of 0.5 inches or less; and a nose bar having a radius substantially equal to the radius defined by the concave portion of said chain links.
Claim 2
Dependent Claim
160 words
In combination a narrow pitch articulated chain for conveying selected items on the top surface thereof and adapted to travel in an endless loop, said chain comprising a plurality of plastic chain links with means for pivotally connecting said links to one another wherein each of said chain links comprises a body member having a greater width than length and a plurality of spaced-apart apertures extending in the widthwise direction or said body member so as to define first and second pivotal axes at the front and rear thereof, and further wherein said first and second pivotal axes of said chain links are spaced-apart about 0.625 inches or less and said chain links each define a concave portion in the bottom surface thereof between said first and second pivotal axes and having a radius of 0.5 inches or less; and a nose bar having a radius substantially equal to the radius defined by the concave portion of said chain links.
Claim 3
Dependent Claim
17 words
A chain according to claim 1 wherein said chain is driven by a tooth and sprocket drive.
Claim 4
Dependent Claim
14 words
A chain according to claim 1 wherein said nose bar is a fixed shaft.
Claim 5
Dependent Claim
14 words
A chain according to claim 1 wherein said nose bar is a rotatable roller.
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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) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |