US3926290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loading chute for cargo vessel
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
•
Filing: 1975-02-27
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Granted: 1975-12-16
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Expires: 1995-02-27
Abstract
Abstract Loading chute for cargo vessel comprising a telescopical duct which comprises a plurality of unit ducts of successively enlarged horizontal cross sections, the uppermost duct being provided with trays which are fixed in the duct so as to form a zigzag ladder structure therein, each of second and other lower ducts being respectively provided with trays which are suspended by rope means from the adjacent upper duct so as to form a zigzag ladder structure, whereby when ducts are telescopically retracted, trays are rotated to the vertical position.
Inventors
- 👤 Imao Isojima
- 👤 Yuzuru Doi
- 👤 Shinji Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:06
CPC Classifications
B; B63; B63B; B63B27/00; B63B27/28; B65; B65G; B65G11/00; B65G11/08; B65G11/085; B65G11/088
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
A loading chute for cargo vessel comprising a telescopically constructed duct which comprises a plurality of unit ducts of successively enlarged horizontal cross sections, the uppermost unit duct being provided with trays which are fixed in said unit duct so as to form a zigzag ladder structure therein, each of the second and other lower unit ducts being respectively provided with trays which are suspended by rope means from the adjacent upper unit duct so as to form a zigzag ladder structure, and each of the second and other lower unit ducts being respectively provided with engaging means at the lower end thereof so that, when a unit duct is retracted over the adjacent upper unit duct, said engaging means engage with the rear portion of each tray located above said engaging means thereby moving said tray in a downward folded position.
Claim 2
Dependent Claim
142 words
A loading chute for cargo vessel comprising a telescopically constructed duct which comprises a plurality of unit ducts of successively enlarged horizontal cross sections, the uppermost unit duct being provided with trays which are fixed in said unit duct so as to form a zigzag ladder structure therein, each of the second and other lower unit ducts being respectively provided with trays which are suspended by rope means from the adjacent upper unit duct so as to form a zigzag ladder structure, and each of the second and other lower unit ducts being respectively provided with engaging means at the lower end thereof so that, when a unit duct is retracted over the adjacent upper unit duct, said engaging means engage with the rear portion of each tray located above said engaging means thereby moving said tray in a downward folded position.
Claim 3
Dependent Claim
39 words
A loading chute for cargo vessel in accordance with claim 1 wherein rear side of each tray of the second and other lower unit ducts is pivoted to a slide block which is slidably provided in the unit duct.
Claim 4
Dependent Claim
144 words
A loading chute for cargo vessel comprising a telescopically constructed duct which comprises a plurality of unit ducts of successively enlarged horizontal cross sections, the uppermost unit duct being provided with trays which are fixed in said unit duct so as to form a zigzag ladder structure therein, each of the second and other lower unit ducts being respectively provided with trays which are vertically rotatably mounted at the rear portions thereof on the inner wall of the unit duct so as to form a zigzag ladder structure, the front portion of each tray being suspended by rope means from the adjacent upper unit duct, and each tray being adapted to be suspended vertically by the loosening of said rope means and taken in the space between the adjacent upper and lower unit ducts when the second and other lower unit ducts are retracted.
Claim 5
Dependent Claim
144 words
A loading chute for cargo vessel comprising a telescopically constructed duct which comprises a plurality of unit ducts of successively enlarged horizontal cross sections, the uppermost unit duct being provided with trays which are fixed in said unit duct so as to form a zigzag ladder structure therein, each of the second and other lower unit ducts being respectively provided with trays which are vertically rotatably mounted at the rear portions thereof on the inner wall of the unit duct so as to form a zigzag ladder structure, the front portion of each tray being suspended by rope means from the adjacent upper unit duct, and each tray being adapted to be suspended vertically by the loosening of said rope means and taken in the space between the adjacent upper and lower unit ducts when the second and other lower unit ducts are retracted.
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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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |