US3881608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bridge crane
Assignee: CONRAD-STORK BEHEER BV
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Filing: 1973-08-06
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Granted: 1975-05-06
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Expires: 1993-08-06
Abstract
Abstract A bridge crane for loading and unloading containers or packing crates into and from a vessel comprises a support structure including a horizontal girder on which one or more carriages are supported for movement each provided with hoisting and propelling devices. A positioning member is also supported for movement along the girder independently of the carriage and is provided with sighting means for determining the position of the positioning member along the girder with respect to the vessel therebelow. A device which may be in the form of an arm for actuating a switch is mounted on the positioning member to halt the carriage at a predetermined distance from the positioning member. In the case where two carriages are provided, one is superimposed on the other and is capable of travelling in a vertical plane therewith and therepast with a load suspended therefrom.
Inventors
- 👤 Leonard Hupkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:15
CPC Classifications
B; B66; B66C; B66C19/00; B66C19/002; B66C13/00; B66C13/18; B66C13/22; B66C13/30; B66C13/46; B66C2700/00; B66C2700/08; B66C2700/082
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
124 words
A bridge crane for loading and unloading containers or packing crates into and from a vessel, said crane comprising a support structure including a horizontal girder, at least one carriage supported for movement along said girder, hoisting means on said carriage for raising and lowering a load from and into a vessel therebelow, propelling means for advancing the carriage along said girder, a positioning member supported for movement along said girder independently of said carriage and including optical sighting means on said positioning member for determining the position of the positioning member along the girder with respect to the vessel therebelow, and means operatively associated with said carriage and said positioning member for halting the carriage at a predetermined distance from said positioning member.
Claim 2
Dependent Claim
124 words
A bridge crane for loading and unloading containers or packing crates into and from a vessel, said crane comprising a support structure including a horizontal girder, at least one carriage supported for movement along said girder, hoisting means on said carriage for raising and lowering a load from and into a vessel therebelow, propelling means for advancing the carriage along said girder, a positioning member supported for movement along said girder independently of said carriage and including optical sighting means on said positioning member for determining the position of the positioning member along the girder with respect to the vessel therebelow, and means operatively associated with said carriage and said positioning member for halting the carriage at a predetermined distance from said positioning member.
Claim 3
Dependent Claim
80 words
A crane as claimed in claim 1 comprising a second said carriage supported on said girder for travel therealong in the same vertical plane as the first carriage, one carriage being disposed above the other such that the lowermost point of said one carriage with a load suspended therefrom in an upmost position is at a higher elevation than the topmost point of the other said carriage so that the carriages are permitted to pass each other in superimposed relationship.
Claim 4
Dependent Claim
74 words
A crane as claimed in claim 2 wherein said means for halting said carriage comprises a distance counting means on said carriage and a distance counting means on the positioning member by which the respective positions of the carriages and the positioning member on the girder can be determined, and a computer connected to said counting means to produce a control signal for stopping the carriage at a predetermined distance from the positioning member.
Claim 5
Dependent Claim
24 words
A crane as claimed in claim 3 wherein said counting means are also connected with the hoisting means of at least the upper carriage.
Claim 6
Dependent Claim
64 words
A crane as claimed in claim 2 wherein said girder comprises two parts extending in parallel spaced relationship, the lower carriage, as seen in front view, having vertical sides, at the end portions of which the carriage is supported by said girder, whereas the upper carriage, as seen in front view, has transversely spaced legs with lower ends which are supported by the girder.
Claim 7
Dependent Claim
21 words
A crane as claimed in claim 5 wherein the hoisting means on the upper carriage is rotatable about a vertical axis.
Claim 8
Dependent Claim
52 words
A crane as claimed in claim 5 wherein said parts of said girder include two parallel superposed surfaces on the upper of which said upper carriage travels and on the lower of which said lower carriage travels, said upper carriage being of inverted U-shape and the lower carriage being of upright U-shape.
Claim 9
Dependent Claim
48 words
A crane as claimed in claim 1 wherein said means for halting said carriage comprises an arm on said positioning member and a switch means on the carriage which is operated by said arm when said carriage is at said predetermined position with respect to said positioning member.
Claim 10
Dependent Claim
16 words
A crane as claimed in claim 1 wherein said optical sighting means comprises a television camera.
Claim 11
Dependent Claim
15 words
A crane as claimed in claim 1 wherein said positioning member includes a driver''s cabin.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |