US3718265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift truck for hot vessels, particularly for steel-mill converters
Assignee: Demay AG
•
Filing: 1971-01-21
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Granted: 1973-02-27
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Expires: 1991-01-21
Abstract
Abstract The lift truck has an undercarriage with driving means for moving the truck along tracks and carrying hydraulic actuators operable to lift the undercarriage at track intersections to change the direction of movement of the truck. Two pairs of piston-cylinder hydraulic actuators are mounted on the undercarriage and each actuator includes a cylinder supported on the undercarriage to extend vertically upwardly therefrom and a piston movable upwardly in the associated cylinder and carrying an enlarged piston head. Pairs of tie rods are supported on each piston head through universal or gimbal type Cardan joints for universal swinging movement, and the lower ends of the tie rods are also provided with the same general type of joints. The tie rods associated with each pair of actuators support a respective stirrup so that, when the pistons are extended, the associated stirrups are lifted. These stirrups engage beneath a reinforcing ring or the like on a hot vessel, such as a steel-mill converter, and are operable to lift the vessel upwardly to engage the vessel in a tilting cradle or support in which the vessel is then locked. The gimbal or Cardan type connections of the tie rods to the piston heads and to the stirrups provide for adjustment of the tie rods and stirrups to the orientation assumed by the converter when the latter is being inserted into a tilting support.
Inventors
- 👤 W Trost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:13
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4686
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
In a transportation lift truck, for hot vessels having an external projection for support of the vessel, particularly steel-mill converters adapted to be supported in a tilting support, and including an undercarriage having driving means for moving the truck along tracks and carrying hydraulic actuator means opeRable to lift the undercarriage at track intersections to change the direction of movement of the truck along the tracks: the improvement comprising, in combination, hoisting means on said undercarriage engageable with vessel projections at at least two points of the vessel periphery, and operable to lift a vessel from said undercarriage into a tilting support for securement in the latter; and means included in said hoisting means accomodating adaption of the entire vessel to the orientation assumed by the entire vessel during insertion thereof into a tilting support.
Claim 2
Dependent Claim
135 words
In a transportation lift truck, for hot vessels having an external projection for support of the vessel, particularly steel-mill converters adapted to be supported in a tilting support, and including an undercarriage having driving means for moving the truck along tracks and carrying hydraulic actuator means opeRable to lift the undercarriage at track intersections to change the direction of movement of the truck along the tracks: the improvement comprising, in combination, hoisting means on said undercarriage engageable with vessel projections at at least two points of the vessel periphery, and operable to lift a vessel from said undercarriage into a tilting support for securement in the latter; and means included in said hoisting means accomodating adaption of the entire vessel to the orientation assumed by the entire vessel during insertion thereof into a tilting support.
Claim 3
Dependent Claim
69 words
In a transportation lift truck, the improvement claimed in claim 1, in which said hoisting means comprises hydraulic piston-cylinder actuators arranged in pairs on said undercarriage and each including an upwardly extensible piston rod having a respective head gimbal-mounted at its upper end; and stirrups each supported from a pair of piston rod heads and oriented to extend tangentially of the circumference of a vessel carried by said truck.
Claim 4
Dependent Claim
223 words
In a transportation lift truck, for hot vessels having an external projection for support of the vessel, particularly steel-mill converters adapted to be supported in a tilting support, and including an undercarriage having driving means for moving the truck along tracks and carrying hydraulic actuator means operable to lift the undercarriage at track intersections to change the direction of movement of the truck along the tracks: the improvement comprising, in combination, hoisting means on said undercarriage engageable with vessel projections at at least two points of the vessel periphery, and operable to lift a vessel from said undercarriage into a tilting support for securement in the latter; and means adapting said hoisting means to the orientation assumed by a vessel during insertion thereof into a tilting support; said hoisting means comprising hydraulic piston-cylinder actuators arranged in pairs on said undercarriage and each including an upwardly extensible piston rod having a respective head gimbal-mounted at its upper end; stirrups each supported from a pair of piston rod heads and oriented to extend tangentially of the circumference of a vessel carried by said truck; Cardan joints on each piston rod head; and substantially vertically oriented tie rods connected to said joints and to said stirrups; said stirrups being arranged to extend tangentially under a reinforcing ring fixedly connected with a vessel positioned on said truck.
Claim 5
Dependent Claim
223 words
In a transportation lift truck, for hot vessels having an external projection for support of the vessel, particularly steel-mill converters adapted to be supported in a tilting support, and including an undercarriage having driving means for moving the truck along tracks and carrying hydraulic actuator means operable to lift the undercarriage at track intersections to change the direction of movement of the truck along the tracks: the improvement comprising, in combination, hoisting means on said undercarriage engageable with vessel projections at at least two points of the vessel periphery, and operable to lift a vessel from said undercarriage into a tilting support for securement in the latter; and means adapting said hoisting means to the orientation assumed by a vessel during insertion thereof into a tilting support; said hoisting means comprising hydraulic piston-cylinder actuators arranged in pairs on said undercarriage and each including an upwardly extensible piston rod having a respective head gimbal-mounted at its upper end; stirrups each supported from a pair of piston rod heads and oriented to extend tangentially of the circumference of a vessel carried by said truck; Cardan joints on each piston rod head; and substantially vertically oriented tie rods connected to said joints and to said stirrups; said stirrups being arranged to extend tangentially under a reinforcing ring fixedly connected with a vessel positioned on said truck.
Claim 6
Dependent Claim
27 words
In a transportation lift truck, the improvement claimed in claim 3, in which the connecting points of said tie rods to said stirrups comprise further Cardan joints.
Claim 7
Dependent Claim
54 words
In a transportation lift truck, the improvement claimed in claim 3, in which each piston rod head supports two double pins extending perpendicularly to each other; each set of two double pins supporting a pair of tie rods; each end of one double pin forming, with the associated tie rod end, a Cardan joint.
Claim 8
Dependent Claim
44 words
In a transportation lift truck, the improvement claimed in claim 4, in which the opposite ends of said stirrups are forked to provide two spaced fork tines; each fork tine engaging a respective pivot pin of the associated one of said further Cardan joints.
Claim 9
Dependent Claim
42 words
In a transportation lift truck, the improvement claimed in claim 5, in which each of said double pins is engaged in a Cardan joint body mounted on the associated piston rod head through the medium of one of said two double pins.
Claim 10
Dependent Claim
60 words
In a transportation lift truck, the improvement claimed in claim 7, in which said stirrups are forked at their opposite ends to provide spaced fork tines; each fork tine being engaged with a respective pin of a further Cardan joint at the lower end of the associated tie rod; said forks being designed as pivot bearings for the associated stirrup.
Claim 11
Dependent Claim
30 words
In a transportation lift truck, the improvement claimed in claim 8, in which the upper tie rod ends carry cross-pins engaged in upwardly opening recesses of the Cardan joint body.
Claim 12
Dependent Claim
28 words
In a Transportation lift truck, the improvement claimed in claim 9, in which the lower tie rod ends have cross-pins engaged in downwardly opening recesses in said forks.
References Cited (Backward Citations)
US811344A
Cited
US2672243A
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Cited
US3321180A
Cited
US3365085A
Cited
US3504421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |