US3557967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Articulated crane
Assignee: Individual
•
Filing: 1969-03-10
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Granted: 1971-01-26
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Expires: 1989-03-10
Abstract
Abstract An articulated crane is disclosed herein having a turntable base pivotally and rotatably supporting an expandable boom. The boom comprises four beams pivotally connected together substantially at their adjacent ends and adapted to be folded together in a compact storage position and to be extended outwardly from the base so that its free end is cantilevered away from said base. The boom further includes crossover braces pivotally secured between the two innermost beams and the two outermost beams so as to provide a scissorslike extension and retraction of the beams. Hydraulic piston and cylinder assemblages are pivotally interconnected between the base and the first beam of the plurality for effecting initial extension of the boom while a second piston and cylinder assemblage effects refined positioning and extension of the boom via the scissorslike mechanism. Means are operably carried on the extreme free end of the boom for engaging cargo or products intended to be lifted or transferred from one location to another.
Inventors
- 👤 Doyle L Madole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:09
CPC Classifications
B; B66; B66C; B66C3/00; B66C3/20; B66C23/00; B66C23/54
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
153 words
A mobile crane comprising: a base; a turntable rotatably carried on said base; an articulated boom pivotally carried on said turntable; said boom comprising a main beam pivoted on one end to said turntable; a plurality of beams pivotally connected together in substantially end-to-end relationship and pivotally connected to said main beam so as to be retractably extended outwardly therefrom; a scissorlike arrangement oF braces crossing over each other and pivotally connected at their extreme ends to selected ones of said plurality of beams and wherein a selected one of said braces in said arrangement is pivotally connected to the end of said main beam opposite to its end pivotally connected to said turntable; and means operably connected between said turntable and said main beam and between said main beam and a selected one of said plurality of beams for pivoting said main beam and for extending and retracting said plurality of beams.
Claim 2
Dependent Claim
153 words
A mobile crane comprising: a base; a turntable rotatably carried on said base; an articulated boom pivotally carried on said turntable; said boom comprising a main beam pivoted on one end to said turntable; a plurality of beams pivotally connected together in substantially end-to-end relationship and pivotally connected to said main beam so as to be retractably extended outwardly therefrom; a scissorlike arrangement oF braces crossing over each other and pivotally connected at their extreme ends to selected ones of said plurality of beams and wherein a selected one of said braces in said arrangement is pivotally connected to the end of said main beam opposite to its end pivotally connected to said turntable; and means operably connected between said turntable and said main beam and between said main beam and a selected one of said plurality of beams for pivoting said main beam and for extending and retracting said plurality of beams.
Claim 3
Dependent Claim
57 words
The invention as defined in claim 1 wherein said operable means includes a pair of piston and cylinder assemblages, one of said pair pivotally connected between said turntable and said main beam and the other one of said pair pivotally connected between said main beam and the end of said beam pivotally connected to said main beam.
Claim 4
Dependent Claim
24 words
The invention as defined in claim 2 wherein the outermost beam of said plurality includes a cargo transferring means pivotally and rotatably carried thereon.
Claim 5
Dependent Claim
29 words
The invention as defined in claim 3 including a piston and cylinder assemblage pivotally connected between said outermost beam and said transferring means for selectively pivoting said transferring means.
Claim 6
Dependent Claim
57 words
The invention as defined in claim 1 wherein said plurality of beams comprises four elongated beams, the innermost pair of said beams pivotally connected at their adjacent ends and including a beam segment integrally formed at the opposite end of each innermost beam angularly disposed with respect to the major axis of each of said innermost beams.
Claim 7
Dependent Claim
58 words
The invention as defined in claim 5 wherein said operable means includes a piston and cylinder assemblage pivotally coupled between the midsection of said main beam and the end of said beam segment associated with the first innermost beam of said pair and a second piston and cylinder assemblage pivotally coupled between said turntable and said main beam.
Claim 8
Dependent Claim
54 words
The invention as defined in claim 6 including: a cargo engaging and holding means carried of the extreme end of the outermost beam of said plurality; pivotal means mounting said cargo engaging and holding means on said outermost beam; and rotatable means rotatably mounting said cargo engaging and holding means on said outermost beam.
Claim 9
Dependent Claim
26 words
The invention as defined in claim 7 wherein said cargo engaging and holding means includes a pair of jaw members adapted to converge to engage cargo.
Claim 10
Dependent Claim
41 words
The invention as defined in claim 1 including: a mobile vehicle having a cargo platform; and said base mounted on said platform so that said boom is operated therefrom to effect loading and unloading of cargo on and from said platform.
References Cited (Backward Citations)
US2831589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |