US3826352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spiral column for endless chain conveyor
Assignee: FKI Industries Inc
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Filing: 1972-10-27
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Granted: 1974-07-30
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Expires: 1992-10-27
Abstract
Abstract A hollow steel upright cylinder is provided with a series of projecting round rods forming a spiral. The brackets which support the spiral track for the conveyor and an outer spiral guide are assembled and supported by the rods with intermediate lengths of tubing. The track and guide are radially positioned uniformly and readily by the predetermined lengths of the tubing. The ends of each rod are threaded and fitted with nuts to secure the parts on the rod.
Inventors
- 👤 Zon J Van
- 👤 R Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/16; B65G21/18; B65G2207/00; B65G2207/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A spiral chain conveyor having a conveyor chain movable in a spiral path and a column for the support of the conveyor chain, spaced parallel chain track strips also supported from the column, said column comprising: a stationary upright cylindrical sheet having a series of oppositely disposed pairs of holes positioned to form a spiral path which defines and corresponds with the spiral of the conveyor, a plurality of rigid rods each supported by the cylinder, one in each of the oppositely disposed pair of holes, each rod having an inner section extending across the interior of the cylinder and an outer projecting section, and a series of brackets assembled on the outer projecting rod sections and secured to and supporting said track strips for carrying the spiral conveyor chain in the spiral path, and an outer spiral chain guide strip carried by the outer ends of the rods.
Claim 2
Dependent Claim
149 words
A spiral chain conveyor having a conveyor chain movable in a spiral path and a column for the support of the conveyor chain, spaced parallel chain track strips also supported from the column, said column comprising: a stationary upright cylindrical sheet having a series of oppositely disposed pairs of holes positioned to form a spiral path which defines and corresponds with the spiral of the conveyor, a plurality of rigid rods each supported by the cylinder, one in each of the oppositely disposed pair of holes, each rod having an inner section extending across the interior of the cylinder and an outer projecting section, and a series of brackets assembled on the outer projecting rod sections and secured to and supporting said track strips for carrying the spiral conveyor chain in the spiral path, and an outer spiral chain guide strip carried by the outer ends of the rods.
Claim 3
Dependent Claim
19 words
The column of claim 1 wherein the guide strip has a series of holes through which the rods extend.
Claim 4
Dependent Claim
21 words
The column of claim 1 which furtheR includes means assembled on each rod and which space said brackets from the cylinder.
Claim 5
Dependent Claim
18 words
The invention of claim 3 wherein said means comprises a series of tubes through which the rod extends.
Claim 6
Dependent Claim
30 words
The column of claim 3 which further includes a tube on each rod and extending across the interior of the cylinder and securement means on each end of the rod.
Claim 7
Dependent Claim
52 words
The column of claim 2 which further includes a number of tubes assembled on each rod and securement means on the ends of the rods, one of the tubes extending across the interior of the cylinder and the other tubes serving to space the track strips and outer guide from the cylinder.
Claim 8
Dependent Claim
34 words
The column of claim 5 wherein the securement means are threaded on the ends of the rod and serve to clamp the tubes and parts therebetween on the rod to form a rigid assembly.
Claim 9
Dependent Claim
34 words
The column of claim 6 wherein the securement means are threaded on the ends of the rod and serve to clamp the tubes and parts therebetween on the rod to form a rigid assembly.
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |