US3812978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane safety barrier
Assignee: JONES CONSTRUCTION CO J
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Filing: 1972-11-21
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Granted: 1974-05-28
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Expires: 1992-11-21
Abstract
Abstract A barrier supported from the base of a crane for movement therewith and shiftable between retracted and horizontally outwardly extended position relative to the base of the crane for enclosing an area about the crane base within which the oscillatable superstructure of the crane is swingable, so as to thereby exclude accidental movement of persons into the area about the base of the crane through which portions of the crane superstructure are swingable.
Inventors
- 👤 D Roland
- 👤 E Hastings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:04
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/88; B66C23/94
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
In combination, a heavy equipment structure of the type including a mobile base including front and rear marginal portions and a pair of opposite side marginal portions, said base having a turntable rotatably supported therefrom upon which superstructure is mounted, said super-structure including low portions thereof spaced further radially from the axis of rotation of said turntable relative to said base than various peripherally spaced marginal portions of said base, one of said end marginal portions and each of said side marginal portions including a pair of horizontally outwardly projecting support members spaced therealong, the outer ends of said support members including tension member support means, and elongated flexible tension member means extending between and slidably supported from said support means for longitudinal shifting relative thereto, said tension member means comprising the outer boundary of a plan area disposed about said axis within which the lower portions of said superstructure are contained during rotation of said superstructure relative to said base.
Claim 2
Dependent Claim
161 words
In combination, a heavy equipment structure of the type including a mobile base including front and rear marginal portions and a pair of opposite side marginal portions, said base having a turntable rotatably supported therefrom upon which superstructure is mounted, said super-structure including low portions thereof spaced further radially from the axis of rotation of said turntable relative to said base than various peripherally spaced marginal portions of said base, one of said end marginal portions and each of said side marginal portions including a pair of horizontally outwardly projecting support members spaced therealong, the outer ends of said support members including tension member support means, and elongated flexible tension member means extending between and slidably supported from said support means for longitudinal shifting relative thereto, said tension member means comprising the outer boundary of a plan area disposed about said axis within which the lower portions of said superstructure are contained during rotation of said superstructure relative to said base.
Claim 3
Dependent Claim
51 words
The combination of claim 1 wherein the other end marginal portion of said base also includes a pair of horizontally outwardly projecting support members and corresponding tension member support means on their outer ends, said tension member means also extending between and supported from the last mentioned pair of support members.
Claim 4
Dependent Claim
12 words
The combination of claim 1 wherein said support members are longitudinally extendible.
Claim 5
Dependent Claim
34 words
The combination of claim 1 wherein the inner ends of said support members are supported from said marginal portion for swinging toward depending upstanding positions about horizontal axes extending along the corresponding marginal portions.
Claim 6
Dependent Claim
12 words
The combination of claim 4 wherein said support members are longitudinally extendible.
Claim 7
Dependent Claim
41 words
The combination of claim 1 wherein the outer end portions of the side marginal support members include upturned terminal ends upon whose upper ends said tension member support means are mounted, said tension member means being under at least mild tension.
Claim 8
Dependent Claim
31 words
The combination of claim 1 wherein said end marginal portion support members are supported from said base for swinging to retracted positions generally paralleling said end marginal portions about upstanding axes.
Claim 9
Dependent Claim
73 words
The combination of claim 1 wherein said base includes hollow transversely extending elongated members extending between said opposite side marginal portions, said support members of said side marginal portions being supported from the corresponding ends of said transversely extending elongated members in telescopic engagement therewith for inward telescoping relative thereto toward retracted positions with only the outer ends of said support members projecting outwardly of the ends of said transversely extending elongated members.
Claim 10
Dependent Claim
26 words
The combination of claim 1 wherein said base includes laterally outwardly extendible outrigger members, said side marginal outwardly projecting members being supported from said outrigger members.
Claim 11
Dependent Claim
41 words
The comBination of claim 8, wherein the outer end portions of the side marginal support members include upturned terminal ends upon whose upper ends said tension member support means are mounted, said tension member means being under at least mild tension.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |