Patent US4742906A successfully refreshed from Google Patents.
US4742906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bend segment for the track of a chain conveyor
Assignee: MCC Nederland BV
•
Filing: 1986-07-01
•
Granted: 1988-05-10
•
Expires: 2006-07-01
Abstract
Abstract A bend segment for a chain conveyor comprising a chain movable over a track including one or more bends, said chain being composed of links of a magnetizable material having a substantially rectangular load bearing surface, the successive links in the chain being pivoted together. The bend segment includes a device for producing a magnetic field to retain the load bearing surfaces of the links flat on the track, which consists of a pair of rails of a magnetizable material wherebetween are provided, at predetermined distances, members for interconnecting the rails and/or for keeping these spaced apart. A synthetic plastics strip is provided in at least the inner bend of the bend segment against the inside of the rail. The device for producing a magnetic field include magnets placed between the rails, with the magnetic lines of force of the magnetic field produced by the magnets extending through the rails to attract the chain links against the rails.
Inventors
- 👤 Jacobus J. Wallaart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:16
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/20; B65G21/2009
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
A bend segment for a chain conveyor comprising a chain movable over a track including one or more bends, said chain being composed of links of a magnetizable material having a substantially rectangular load bearing surface, the successive links in the chain being pivoted together, said bend segment including means for producing a magnetic field to retain the load bearing surface of the links flat on the track, characterized in that the bend segment comprises a pair of rails of a magnetizable material; elongated interconnecting means for the rails, said means being positioned at predetermined distances between both rails; and a synthetic plastics guide strip against the inside of the rail in at least the inner bend of the bend segment; and in that the means for producing a magnetic field comprise annular magnets placed between the rails, around said interconnecting means, with the magnetic lines of force of the magnetic field produced by the magnets extending through the rails to attract the chain links against the rails.
Claim 2
Dependent Claim
168 words
A bend segment for a chain conveyor comprising a chain movable over a track including one or more bends, said chain being composed of links of a magnetizable material having a substantially rectangular load bearing surface, the successive links in the chain being pivoted together, said bend segment including means for producing a magnetic field to retain the load bearing surface of the links flat on the track, characterized in that the bend segment comprises a pair of rails of a magnetizable material; elongated interconnecting means for the rails, said means being positioned at predetermined distances between both rails; and a synthetic plastics guide strip against the inside of the rail in at least the inner bend of the bend segment; and in that the means for producing a magnetic field comprise annular magnets placed between the rails, around said interconnecting means, with the magnetic lines of force of the magnetic field produced by the magnets extending through the rails to attract the chain links against the rails.
Claim 3
Dependent Claim
39 words
A bend segment according to claim 1 characterized in that the interconnecting means around which magnets are placed, include a bushing of a non-magnetizable material which bushing connects both rails and means to mount the bushing to both rails.
Claim 4
Dependent Claim
42 words
A bend segment according to claim 2 characterized in that sleeves of a magnetizable material are provided around those interconnecting means that carry the annular magnets, these sleeves being located between each rail and the magnet located the nearest to that rail.
Claim 5
Dependent Claim
33 words
A bend segment according to claim 1, characterized in that also in the outer bend of the bend segment there is provided a synthetic plastics guide strip against the inside of the rail.
Claim 6
Dependent Claim
38 words
A bend segment according to claims 2, 3 or 4 characterized in that around at least a number of the annular magnets there is provided a sleeve to press the plastics guide strip or strips against the rail(s).
Claim 7
Dependent Claim
60 words
A bend segment according to claim 1 for guiding a chain with an upper run and a lower return run, characterized in that synthetic plastics strips are provided against the outer sides of the rails, the side of each strip facing the rail being provided with slots for receiving the sides of the chain links of the lower return run.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |