US3856149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile load handling machines
Assignee: SHAW TREW AND SMITH Ltd
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Filing: 1973-06-06
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Granted: 1974-12-24
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Expires: 1993-06-06
Abstract
Abstract A mobile load handling machine primarily in the form of a crane is provided in which a jib is pivotally mounted from the machine chassis on upstanding mutually inclined linkage which interconnects front and rear wheeled portions of the machine chassis, which chassis portions are movable relative to one another along the fore and aft axis of the machine while ram means and tie linkage are pivotally connected between a mounting member movable in a fore and aft direction on one of the chassis portions and the jib whereby on extension and retraction of the ram means it operates in conjunction with the tie linkage to effect raising and lowering luffing movement of the jib and also operates in conjunction with the mutually inclined linkage to effect relative retraction of the chassis portions to reduce the wheel base of the machine on raising of the jib and vice versa.
Inventors
- 👤 D Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:19
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/28; B62; B62D; B62D21/00; B62D21/14; B66; B66C; B66C23/00; B66C23/62
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
A mobile load handling machine, comprising: a chassis having front and rear wheeled portions movable relative to one another along the fore and aft axis of the machine; upstanding mutually inclined linkage pivotally interconnecting said chassis portions; a jib supported by said linkage from the chassis portions; a mounting member movable in a fore and aft direction on one of the chassis portions; tie linkage pivotally connected between said mounting member and the jib; and ram means pivotally connected between the mounting member and the jib whereby, on extension and retraction of the ram means, said ram means operates in conjunction with the tie linkage to effect raising and lowering luffing movement of the jib and also operates in conjunction with the mutually inclined linkage to effect relative retraction of the chassis portions to reduce the wheel base of the machine on raising of the jib and vice versa.
Claim 2
Dependent Claim
149 words
A mobile load handling machine, comprising: a chassis having front and rear wheeled portions movable relative to one another along the fore and aft axis of the machine; upstanding mutually inclined linkage pivotally interconnecting said chassis portions; a jib supported by said linkage from the chassis portions; a mounting member movable in a fore and aft direction on one of the chassis portions; tie linkage pivotally connected between said mounting member and the jib; and ram means pivotally connected between the mounting member and the jib whereby, on extension and retraction of the ram means, said ram means operates in conjunction with the tie linkage to effect raising and lowering luffing movement of the jib and also operates in conjunction with the mutually inclined linkage to effect relative retraction of the chassis portions to reduce the wheel base of the machine on raising of the jib and vice versa.
Claim 3
Dependent Claim
27 words
A mobile load handling machine according to claim 1 wherein the ram means and mutually inclined linkage are pivotally connected to the jib about a common axis.
Claim 4
Dependent Claim
40 words
A mobile load handling machine according to claim 1 wherein the mutually inclined linkage is linked to the mounting member in order to stabilise the latter and the ram means and tie linkage in relation to the mutually inclined linkage.
Claim 5
Dependent Claim
39 words
A mobile load handling machine according to claim 3 wherein the mutually inclined linkage and the linking thereof to the mounting member define a parallelogrammic link formation with the ram means acting substantially diagonally in relation to said formation.
Claim 6
Dependent Claim
60 words
A mobile load handling machine according to claim 1 wherein one of the said chassis portions is provided with a longitudinal member slidably engaging the other chassis portion, said member having a swivel connection with the first mentioned chassis portion about the fore and aft axis of the machine to permit relative oscillation of the chassis portions about said axis.
Claim 7
Dependent Claim
39 words
A mobile load handling machine according to claim 1 wherein there is provided in combination with the machine fork lift means mounted at the front of the front chassis portion and operable separately or in conjunction with the jib.
Claim 8
Dependent Claim
41 words
A mobile load handling machine according to claim 6 wherein forks of the fork lift means are pivotally mounted from the latter whereby they may be swung back to an inoperative position especially for the purpose of operation of the jib.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |