US4080842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivot device
Assignee: Laitram LLC
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Filing: 1974-06-10
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Granted: 1978-03-28
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Expires: 1994-06-10
Abstract
Abstract A chain link conveyor comprises modules pivotally connected to one another. Each module is designed to be molded as a unit, preferably of an organic plastic material and comprises a number of parallel, spaced links having end sections with aligned holes for snap-together pivot rods, and intermediate sections joined by integral cross members to form a rigid, supporting grid.
Inventors
- 👤 James M. Lapeyre
- 👤 Fernand S. Lapeyre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:00
CPC Classifications
B; B65; B65G; B65G17/00; B65G17/06; B65G17/08; B65G2201/00; B65G2201/02; B65G2207/00; B65G2207/12; B65G2207/30; Y; Y10; Y10T; Y10T403/00; Y10T403/65; Y10T403/655
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
In a chain link conveyor comprising at least two links, the improvement comprising a pivot rod extending through said links for joining said links together so that said links are pivotal about said rods, said rod being formed of a pair of pivot pins, each of said pins including a solid substantially cylindrical shaft of substantially circular cross-section having an enlarged head portion at one end and being tapered at the other end, said tapered end being formed of a pair of bevel surfaces substantially parallel to but displaced from one another to form therebetween a ridge laterally disposed across the axis of said shaft and facing substantially toward said head portion, said pivot pins being connected so that the bevel surfaces of opposite pins are indexed and said ridge of one of said pins contacts said ridge of the opposite pin.
Claim 2
Dependent Claim
142 words
In a chain link conveyor comprising at least two links, the improvement comprising a pivot rod extending through said links for joining said links together so that said links are pivotal about said rods, said rod being formed of a pair of pivot pins, each of said pins including a solid substantially cylindrical shaft of substantially circular cross-section having an enlarged head portion at one end and being tapered at the other end, said tapered end being formed of a pair of bevel surfaces substantially parallel to but displaced from one another to form therebetween a ridge laterally disposed across the axis of said shaft and facing substantially toward said head portion, said pivot pins being connected so that the bevel surfaces of opposite pins are indexed and said ridge of one of said pins contacts said ridge of the opposite pin.
Claim 3
Dependent Claim
21 words
In a chain link-conveyor, a pivot rod as defined in claim 1 wherein said pins are formed of synthetic polymeric material.
Claim 4
Dependent Claim
21 words
In a chain link-conveyor, a pivot rod as defined in claim 2 wherein said material is impregnated with an antibacterial agent.
Claim 5
Dependent Claim
28 words
In a chain link-conveyor, a pivot rod as defined in claim 1, wherein said beveled surfaces of each of said pins extend approximately 30° to said shaft axis.
Claim 6
Dependent Claim
26 words
In a chain link-conveyor, a pivot rod as defined in claim 1 wherein said ridge includes a substantially flat surface disposed perpendicularly to said shaft axis.
Claim 7
Dependent Claim
27 words
In a chain link-conveyor, a pivot rod as defined in claim 1, wherein each of said pins is formed of a material which is distortable under pressure.
References Cited (Backward Citations)
US136530A
Cited
US575230A
Cited
US607315A
Cited
US893163A
Cited
US1348692A
Cited
US1975244A
Cited
US2506979A
Cited
US2788670A
Cited
US2893521A
Cited
US3596918A
Cited
US3830581A
Cited
US3819198A
Cited
US3915025A
Cited
US3914831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |