US3828913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifting arrangement for cantilever arms of conveyors
Assignee: CNH Industrial Baumaschinen GmbH
•
Filing: 1973-07-10
•
Granted: 1974-08-13
•
Expires: 1993-07-10
Abstract
Abstract A lifting arrangement particularly for cantilever support arms of conveyors of such devices as excavators, comprises a first rear arm part which is supported for pivotal movement adjacent one end about a horizontal axis. A second front cantilever arm part is pivotally mounted about a second horizontal axis which is carried on the first cantilever arm. Lifting means in the form of a fluid pressure cylinder is pivotally connected to a mast which extends above the rear pivot of the first cantilever arm part and it is connected through a tow connection which is braced to the first cantilever part. The tow connection, for example, includes two diagonal braces pivoted at spaced locations to the first cantilever part and connected at their upper ends to a holding plate which is moved by a piston movable in the fluid cylinder of the lifting device. The tow connection also includes a connection to the second front conveyor part. The connection is such that the first part may be pivoted downwardly in respect to the first conveyor part only up to a predetermined amount and it may be lifted upwardly to a position level with the first part and then the first and second cantilever arm parts of the conveyor are lifted together upwardly. The apparatus is advantageously carried on a excavator vehicle having a carriage for moving it over the ground and carrying a bucket-wheel cantilever arm support structure at its end opposite to the conveyor cantilever arm structure.
Inventors
- 👤 G Scholler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:19
CPC Classifications
B; B65; B65G; B65G65/00; B65G65/02; B65G65/16; B65G65/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
255 words
A lifting arrangement particularly for cantilever support arms of conveyors of excavators, comprising a first rear cantilever conveyor support arm, first support means pivotally mounting said first rear cantilever conveyor support arm for pivotal movement about a first horizontal axis, a second front cantilever conveyor support arm pivotally mounted about a second horizontal support axis carried on said first rear cantilever conveyor support arm, lifting means for lifting said first and second cantilever conveyor support arms including a member anchored at its one end above said first and second cantilever conveyor support arms, a tow connection braced to said first cantilever support arm at a spaced location from said first support means and connected to said lifting means and including a lost motion connection connected to said second rear cantilever conveyor support arm, said lost motion connection permitting independent movement of said second cantilever conveyor support arm from said first cantilever conveyor support arm, said lifting means being connected to said tow connection to exert a direct lift on said first rear cantilever conveyor support arm and through said lost motion connection to said second forward cantilever conveyor support arm, said forward cantilever conveyor support arm being pivotal below the axis of said first rear cantilever conveyor support arm in a lowermost position and being raisable to a position in which the axis thereof is substantially aligned with the axis of said first rear cantilever conveyor support arm before said connection to said lifting means causes lifting of both first and second cantilever support arms.
Claim 2
Dependent Claim
255 words
A lifting arrangement particularly for cantilever support arms of conveyors of excavators, comprising a first rear cantilever conveyor support arm, first support means pivotally mounting said first rear cantilever conveyor support arm for pivotal movement about a first horizontal axis, a second front cantilever conveyor support arm pivotally mounted about a second horizontal support axis carried on said first rear cantilever conveyor support arm, lifting means for lifting said first and second cantilever conveyor support arms including a member anchored at its one end above said first and second cantilever conveyor support arms, a tow connection braced to said first cantilever support arm at a spaced location from said first support means and connected to said lifting means and including a lost motion connection connected to said second rear cantilever conveyor support arm, said lost motion connection permitting independent movement of said second cantilever conveyor support arm from said first cantilever conveyor support arm, said lifting means being connected to said tow connection to exert a direct lift on said first rear cantilever conveyor support arm and through said lost motion connection to said second forward cantilever conveyor support arm, said forward cantilever conveyor support arm being pivotal below the axis of said first rear cantilever conveyor support arm in a lowermost position and being raisable to a position in which the axis thereof is substantially aligned with the axis of said first rear cantilever conveyor support arm before said connection to said lifting means causes lifting of both first and second cantilever support arms.
Claim 3
Dependent Claim
55 words
A lifting arrangement, according to claim 1, including a support extending upwardly from said second forward cantilever conveyor support arm at a location adjacent said second horizontal axis and being connected on one side to said lost motion connection and on the opposite side to the opposite end of said second cantilever conveyor support arm.
Claim 4
Dependent Claim
48 words
A lifting arrangement, according to claim 1, wherein said lifting means comprises a hydraulic cylinder having a piston rod movable therein connected to said tow connection, said lost motion part including an elongated slot with a cross bolt member therein connected to said second forward conveyor support arm.
Claim 5
Dependent Claim
75 words
A lifting arrangement, according to claim 3, wherein said piston rod is pivotally connected to said tow connection, said second forward centilever conveyor support arm having an upstanding rigid member, said lost motion part having a cross member slidable in an elongated slot, said cross member being connected to said upstanding connection on one side thereof the opposite being connected to a traction member to the outer end of said second forward conveyor support arm.
Claim 6
Dependent Claim
96 words
A lifting arrangement, according to claim 1, wherein said lifting means includes a fluid pressure operated cylinder having a piston slidable therein with a connecting rod connected directly to said tow connection, a linkage between the end of said cylinder and said tow connection comprising two links pivoted together and to said cylinder and said tow connection respectively, said links when extending limiting the downward movement of said first rear cantilever support arm and being pivotal together upon retraction of the piston in said cylinder to permit lifting of said first rear cantilver conveyor support arm.
Claim 7
Dependent Claim
39 words
A lifting arrangement, according to claim 1, wherein said first support means comprises a superstructure having a pivotal mounting portion for said first rear cantilever conveyor support arm, and carriage means supporting said superstructure for movement over the ground.
Claim 8
Dependent Claim
21 words
A lifting arrangement, according to claim 6, including aN upstanding mast portion carried on said superstructure and carrying said lifting means.
Claim 9
Dependent Claim
62 words
A lifting arrangement, according to claim 7, including a bucket-wheel cantilever support arm pivotally mounted on said superstructure and extending outwardly therefrom in a direction opposite to said first and second cantilever conveyor support arms and a bucket-wheel rotatably mounted adjacent the outer end of said bucket-wheel support arm and means on said superstructure for raising and lowering said bucket-wheel support arm.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |