Patent US5016241A successfully refreshed from Google Patents.
Patent US3706285A successfully refreshed from Google Patents.
US3706285A
Expired / Lapsed
US
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Hoisting crane
Assignee: Linden Alimak AB
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Filing: 1971-01-18
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Granted: 1972-12-19
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Expires: 1991-01-18
Abstract
Abstract A hoisting crane of the type having a horizontal jib which is pivotally mounted on a vertical tower and supports thereon a movable carriage having a lifting means. The jib is formed of a plurality of detachably couplable modules each of which is formed of at least one upper and at least one lower member extending parallel to each other in the direction of the longitudinal axis of the jib. The longitudinal members of the respective modules all have the same spacing relative to each other so that all of the modules may be constructed with the same overall dimensions on a common jig. The modules which form a jib may have varying strengths to permit the modules which are closer to the pivotal mount on the tower to have a greater load-carrying capacity than those which are disposed toward the free end of the jib, and this is accomplished by having the associated members of some of the modules formed with a greater material cross-section than that of the corresponding members of other of the modules.
Inventors
- 👤 Lars Gynt
- 👤 Lennart Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:03
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/64; B66C23/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
182 words
In a hoisting crane of the type comprising a horizontal jib pivotally mounted on a vertical tower aNd supporting thereon a movable carriage having a lifting means, the improvement which comprises: said jib being formed of a plurality of detachably couplable modules each of which comprises at least one upper and at least one lower member which members extend parallel to each other in the direction of the longitudinal axis of the horizontal jib, said members in each of the respective modules of the jib all having the same spacing relative to each other so as to permit each jib-forming module to be constructed with the same dimensions in a common jib, some of said jib-forming modules having their associated members formed with a greater material cross-section than that of the corresponding members of other of said modules so as to permit an increase in the load-carrying strength of the modules in a direction from the free end of the jib toward its pivotal mounting on said tower without varying the overall crosssectional dimensions of the several modules forming a complete jib.
Claim 2
Dependent Claim
182 words
In a hoisting crane of the type comprising a horizontal jib pivotally mounted on a vertical tower aNd supporting thereon a movable carriage having a lifting means, the improvement which comprises: said jib being formed of a plurality of detachably couplable modules each of which comprises at least one upper and at least one lower member which members extend parallel to each other in the direction of the longitudinal axis of the horizontal jib, said members in each of the respective modules of the jib all having the same spacing relative to each other so as to permit each jib-forming module to be constructed with the same dimensions in a common jib, some of said jib-forming modules having their associated members formed with a greater material cross-section than that of the corresponding members of other of said modules so as to permit an increase in the load-carrying strength of the modules in a direction from the free end of the jib toward its pivotal mounting on said tower without varying the overall crosssectional dimensions of the several modules forming a complete jib.
Claim 3
Dependent Claim
55 words
The crane of claim 1, in which said upper and lower longitudinal members of each module are connected together by substantially vertical rods and diagonal rods, all of said diagonal rods extending in substantially the same direction and sloping downwardly toward the free end of the jib so as to be in tension under load.
Claim 4
Dependent Claim
31 words
The crane of claim 1, in which each module is formed of hollow tubes and corresponding tubes of the respectively different modules having different load-bearing capacity have the same outer dimension.
Claim 5
Dependent Claim
31 words
The crane of claim 1, in which each module is formed of hollow tubes and corresponding tubes of the respectively different modules having different load-bearing capacity have the same inner dimension.
Claim 6
Dependent Claim
62 words
The crane of claim 1, which further includes a detachable coupling means to couple adjoining ends of said modules, each said coupling means comprising coupling elements at the respective ends of the upper longitudinal members for providing a tension coupling therebetween and coupling elements for the respective ends of the lower longitudinal members which provide longitudinal alignment of the corresponding lower members.
Claim 7
Dependent Claim
30 words
A crane according to claim 1, characterized by a smooth transition between the lower members of the modules so that said rods can serve as a runway for the carriage.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |