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US3792758A
Expired / Lapsed
US
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Stacker crane construction
Assignee: FKI Industries Inc
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Filing: 1971-11-15
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Granted: 1974-02-19
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Expires: 1991-11-15
Abstract
Abstract A stacker crane storage arrangement wherein a tray is supported for reversible extension transversely of a tower which is movable on a track, so as to deposit cargo laden pallets in cells or cubicles of open sides storage grids on both sides of the track. The tray of the tower is movable by a compact mechanism, utilizing telescopically and reversibly extending drive members carried by pairs of cantilever beams and driven by sprocket chains and hydraulic cylinders in a dual system which effects reversible motion of a tray to either side of the tower. The telescopic tray mechanism provides for moving a cargo laden tray to either a part distance or a full distance transversely of the tower, so that pallets can be stored in or retrieved from double depth storage grids. The specific racks or cells can hold two pallets in tandem, there being a first pallet position and a second pallet position in each cell. The arrangement and construction has features whereby very tall towers are usable.
Inventors
- 👤 E Wentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:55
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/14; B66F9/141; B65; B65G; B65G1/00; B65G1/02; B65G1/04; B65G1/0407
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
A stacker crane comprising a tower having a pair of horizontally spaced columns and a traction wheel under each, said columns and wheels being spaced longitudinally in the direction of travel of said stacker crane, a respective traction drive motor for each traction wheel adjacent the respective traction wheel, a tray elevator in the space between said columns and an elevator drive motor for actuating said tray elevator in a vertical path of traverse, said traction drive motors being disposed outside the space between the columns, a pair of spaced lift chains extending vertically and supported by said columns and having upper and lower ends attached to said tray elevator and being spaced substantially the distance between said columns and extending downwardly intermediate said traction wheels below the upper peripheries thereof effecting space between said wheels and said chains to increase the path of vertical traverse of said tray elevator.
Claim 2
Dependent Claim
150 words
A stacker crane comprising a tower having a pair of horizontally spaced columns and a traction wheel under each, said columns and wheels being spaced longitudinally in the direction of travel of said stacker crane, a respective traction drive motor for each traction wheel adjacent the respective traction wheel, a tray elevator in the space between said columns and an elevator drive motor for actuating said tray elevator in a vertical path of traverse, said traction drive motors being disposed outside the space between the columns, a pair of spaced lift chains extending vertically and supported by said columns and having upper and lower ends attached to said tray elevator and being spaced substantially the distance between said columns and extending downwardly intermediate said traction wheels below the upper peripheries thereof effecting space between said wheels and said chains to increase the path of vertical traverse of said tray elevator.
Claim 3
Dependent Claim
36 words
A stacker crane as set forth in claim 1, including means at the lower ends of each chain for taking up slack due to chain wear elongation and means to adjust elongation due to load variation.
Claim 4
Dependent Claim
26 words
A stacker crane as set forth in claim 2, both of said means comprising bolt and nut devices and the latter of said means being resilient.
Claim 5
Dependent Claim
39 words
A stacker crane as set forth in claim 1, said towers comprising vertical corner members extending substantially the height of said tower and said tray elevator having guide roller means encompassing said corner members and movable threalong for guidance.
Claim 6
Dependent Claim
75 words
A stacker crane as set forth in claim 1, said tower columns being each comprised of four corner angle irons having diagonal structural bracing therebetween, a top frame extending across said tower and securing said columns, said columns extending into said frame, bearing blocks carried by said columns in said top frame and a shaft extending between said bearing blocks and having sprocket wheels thereon and said lift chains being carried on respective sprocket wheels.
Claim 7
Dependent Claim
62 words
A stacker crane as set forth in claim 1, and comprising a bottom frame for said columns, bearing blocks in said bottom frame disposed below said respective columns and a shaft extending between said bearing blocks and having sprocket wheels thereon and respective lift chains extending around said sprocket wheels, inclduing a drive means between said tray elevator motor and said shaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |