Patent US3791508A successfully refreshed from Google Patents.
US3791508A
Expired / Lapsed
US
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Worm conveyors
Assignee: KINGSTON CONVEYORS Ltd
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Filing: 1972-11-20
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Granted: 1974-02-12
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Expires: 1992-11-20
Abstract
Abstract A conveyor for moving articles along on a rail or other smooth surface comprising two superposed worms with a third worm with its axis symmetrically spaced from the axes of the other two worms, the worms being formed as helical grooves with like root diameters in rubber or plastics material on metal shafts which in use are driven at the same speed.
Inventors
- 👤 M Osborne
- 👤 A Birch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:05
CPC Classifications
B; B65; B65G; B65G33/00; B65G33/02; B65G33/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
In combination with a conveyor for linearly moving articles along a smooth support surface, a first helical groove worm with its rotational axis spaced from and parallel to said support surface, a second helical groove worm with its rotational axis vertically spaced from and parallel to said rotational axis of said first worm, and a third helical groove worm with its rotational axis symmetrically spaced from said axes of said first and second worms, the helical grooves of said worms having like root diameters and means for driving said worms at like speed.
Claim 2
Dependent Claim
93 words
In combination with a conveyor for linearly moving articles along a smooth support surface, a first helical groove worm with its rotational axis spaced from and parallel to said support surface, a second helical groove worm with its rotational axis vertically spaced from and parallel to said rotational axis of said first worm, and a third helical groove worm with its rotational axis symmetrically spaced from said axes of said first and second worms, the helical grooves of said worms having like root diameters and means for driving said worms at like speed.
Claim 3
Dependent Claim
72 words
The combination as claimed in claim 1, wherein each worm includes helical groove formed from plastic and a metal shaft and where each worm is made in axially aligned sections; means for drivingly engaging said metal shaft of one of said sections with the metal shaft of the adjacent aligned section, a bearing located in said plastic of said adjacent sections for supporting said shafts; and bracket means for holding said bearing.
References Cited (Backward Citations)
US3054496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |