US3804232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structurally balanced plastic conveyor chain
Assignee: REX-PT Inc A CORP OF
•
Filing: 1972-12-04
•
Granted: 1974-04-16
•
Expires: 1992-12-04
Abstract
Abstract A molded plastic conveyor chain link is constructed such that the pitch line of the link is offset upwardly from the horizontal centerline of the link. The relative increase in the volume of link material below the pitch line provides more nearly equal section moduli above and below the pitch line. As a result, the resistance of the chain link to transient bending stresses induced by variations in the line of chain pull vertically from the pitch line is substantially balanced.
Inventors
- 👤 E Freiwald
- 👤 R Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:14
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/06; B65G17/08; B65G17/086; B65G2201/00; B65G2201/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
A chain link of unitary construction including laterally spaced side bars having ends provided with aligned bores for the pins of the chain and a crosswise top plate merging with the side bars such that the upper surface of the plate is flush with the upper dimensions of the side bars, the improvement wherein the aXes of said bores defining the pitch line of the chain are offset upwardly from the longitudinal centerline of the link whereby the effective section modulus of the link above and below the pitch line is substantially equal.
Claim 2
Dependent Claim
93 words
A chain link of unitary construction including laterally spaced side bars having ends provided with aligned bores for the pins of the chain and a crosswise top plate merging with the side bars such that the upper surface of the plate is flush with the upper dimensions of the side bars, the improvement wherein the aXes of said bores defining the pitch line of the chain are offset upwardly from the longitudinal centerline of the link whereby the effective section modulus of the link above and below the pitch line is substantially equal.
Claim 3
Dependent Claim
12 words
The invention of claim 1 wherein the link is of molded construction.
Claim 4
Dependent Claim
12 words
The invention of claim 2 wherein the link is molded of plastic.
References Cited (Backward Citations)
US2911091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |