Patent US380489A successfully refreshed from Google Patents.
Patent US3552546A successfully refreshed from Google Patents.
US3552546A
Expired / Lapsed
US
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Portable belt conveyor with radius movement and hydraulic telescoping and raising
Assignee: Pettibone Corp
•
Filing: 1968-11-04
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Granted: 1971-01-05
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Expires: 1988-11-04
Abstract
Abstract A very long belt conveyor is reduced to road transportable length by hydraulically telescoping both of its ends, drawing them under a section of roller way which is cammed up by them and lowered for the lowest possible center of gravity, and for lower clearance. The main frame is supported near a midposition by twolegged hydraulic standard. A ''''fifth wheel'''' on the lower end of the main frame can be lowered by hydraulically collapsing the standard, for resting on a tractor truck. Each leg is in three telescoping parts enclosing a hydraulic cylinder and piston combination also in three parts, the two legs being kept in step as they expand and contract by an endless chain for each coupled by a torque tube. At the foot of each leg a pair of tandem wheels is carried by an equalizer beam which in turn rocks in a yoke which may swing between a road travel position and a radius swing position, the yoke being carried by an extendable section hydraulically actuated for providing wide separation of the support points during operation and contracting to a legal spacing for road travel. To accommodate the geometric changes resulting from raising or lowering the conveyor while the wheels are in the radius swinging position. A swing-axis pedestal for the low end of the conveyor has a guide slot that shifts the lift axis correctly according to the changing slope of the conveyor. Both telescopic sections of the conveyor are moved simultaneously by a cable system which is actuated by a cylinder with a single piston projecting from both ends to pay out cable at one end while drawing it in at the other, one direction of movement tensioning the cable for retracting the telescopic sections and the other direction of movement tensioning the cable, or a different cable, for expanding the conveyor. Various safety features and other details are disclosed.
Inventors
- 👤 James D Rath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:11
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/10; B65G21/14
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
170 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; the end portions of the roller way on the main frame being movable upwardly to permit passage of the end portions thereunder; movement control means interconnecting the two end sections to enforce their joint movement in retraction or extension to maintain a safe overbalance in one direction about a generally central support.
Claim 2
Dependent Claim
170 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; the end portions of the roller way on the main frame being movable upwardly to permit passage of the end portions thereunder; movement control means interconnecting the two end sections to enforce their joint movement in retraction or extension to maintain a safe overbalance in one direction about a generally central support.
Claim 3
Dependent Claim
148 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; movement control means interconnecting the two end sections to enforce their joint movement in retraction or extension to maintain a safe overbalance in one direction about a generally central support.
Claim 4
Dependent Claim
148 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; movement control means interconnecting the two end sections to enforce their joint movement in retraction or extension to maintain a safe overbalance in one direction about a generally central support.
Claim 5
Dependent Claim
137 words
A telescopic conveyor including an elongate main frame, an end section extending therefrom, a roller way formed by rolls along the top of the main frame and of the end section; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end section being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near the end of the main frame around which the return run is drawn by the portion of the roller way on the end section as it is retracted into the main frame; the end portion of the roller way on the main frame being movable upwardly to permit passage of the end portion thereunder.
Claim 6
Dependent Claim
137 words
A telescopic conveyor including an elongate main frame, an end section extending therefrom, a roller way formed by rolls along the top of the main frame and of the end section; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end section being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near the end of the main frame around which the return run is drawn by the portion of the roller way on the end section as it is retracted into the main frame; the end portion of the roller way on the main frame being movable upwardly to permit passage of the end portion thereunder.
Claim 7
Dependent Claim
118 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame.
Claim 8
Dependent Claim
118 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame.
Claim 9
Dependent Claim
34 words
A telescopic conveyor of claim 2 which includes hydraulic means for moving the end sections in and out; and lock means for securing the end sections in extended position independently of the hydraulic means.
Claim 10
Dependent Claim
25 words
A telescopic conveyor of claim 5 which includes threaded means for accomplishing accurate positioning for locking, part of the lock being of the pin type.
Claim 11
Dependent Claim
145 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven roll; and an endless belt e extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; hydraulic means for moving the end sections jointly in and out, and lock means for securing the end sections in extended position independently of the hydraulic means.
Claim 12
Dependent Claim
145 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven roll; and an endless belt e extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; hydraulic means for moving the end sections jointly in and out, and lock means for securing the end sections in extended position independently of the hydraulic means.
Claim 13
Dependent Claim
144 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; hydraulic means for moving the end section in and out, and lock means for securing the end section in extended position independently of the hydraulic means.
Claim 14
Dependent Claim
144 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; a return roller for the return run of the conveyor near each end of the main frame around which the return run is drawn by the portion of the roller way on each end section as it is retracted into the main frame; hydraulic means for moving the end section in and out, and lock means for securing the end section in extended position independently of the hydraulic means.
Claim 15
Dependent Claim
34 words
A telescopic conveyor of claim 4, said main frame having a flat top and a bottom diverging therefrom from its ends inwardly, and said end section moving away from the top as it retracts.
Claim 16
Dependent Claim
141 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; the end section being supported during movement by rollers adjacent the outer end of the main section and running on the under surface of tracks on the end section, and by roller pairs well spaced from said rollers in the direction of retraction, carried by the end section and running on upwardly and downwardly facing surfaces of tracks, the upwardly facing surface sloping to shed debris.
Claim 17
Dependent Claim
141 words
A telescopic conveyor including an elongate main frame, an end section extending from each end thereof, a roller way formed by rolls along the top of the main frame and of the end sections; a power-driven drive roll; and an endless belt extending along the tops of the rolls, returning under the rolls, and extending around the drive roll; the end sections being movable into the main frame to shorten the length of the conveyor; the end section being supported during movement by rollers adjacent the outer end of the main section and running on the under surface of tracks on the end section, and by roller pairs well spaced from said rollers in the direction of retraction, carried by the end section and running on upwardly and downwardly facing surfaces of tracks, the upwardly facing surface sloping to shed debris.
Claim 18
Dependent Claim
24 words
A telescopic conveyor of claim 4 including a mobile standard secured to the main section at an intermediate portion thereof and including telescopic legs.
Claim 19
Dependent Claim
46 words
A telescopic conveyor of claim 4 including a mobile standard secured to the main section at an intermediate portion thereof and including telescopic legs, each of at least three telescopic parts to retract to road travel height and extend to position the conveyor at maximum slope.
Claim 20
Dependent Claim
183 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axes approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; and a ''''fifth wheel'''' type of fitting on the lower end of the main section adapted to be lowered onto the ''''fifth wheel'''' of a tractor Truck; said standard being rigidly secured to the main section so that the spacing of the wheels from the pedestal changes as the conveyor is raised and lowered, said pedestal and lower end section being provided with mutually coacting means for producing relative movement between them corresponding to such changing distance.
Claim 21
Dependent Claim
183 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axes approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; and a ''''fifth wheel'''' type of fitting on the lower end of the main section adapted to be lowered onto the ''''fifth wheel'''' of a tractor Truck; said standard being rigidly secured to the main section so that the spacing of the wheels from the pedestal changes as the conveyor is raised and lowered, said pedestal and lower end section being provided with mutually coacting means for producing relative movement between them corresponding to such changing distance.
Claim 22
Dependent Claim
156 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axles approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; said standard being rigidly secured to the main section so that the spacing of the wheels from the pedestal changes as the conveyor is raised and lowered, said pedestal and lower end section being provided with mutually coating means for producing relative movement between them corresponding to such changing distance.
Claim 23
Dependent Claim
156 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axles approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; said standard being rigidly secured to the main section so that the spacing of the wheels from the pedestal changes as the conveyor is raised and lowered, said pedestal and lower end section being provided with mutually coating means for producing relative movement between them corresponding to such changing distance.
Claim 24
Dependent Claim
153 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axes approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; said standard being rigidly secured to the main section so that the spacing of the wheels from the pedestal changes as the conveyor is raised and lowered, said pedestal and lower end section being provided with means permitting relative movement between them corresponding to such changing distance.
Claim 25
Dependent Claim
153 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axes approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; said standard being rigidly secured to the main section so that the spacing of the wheels from the pedestal changes as the conveyor is raised and lowered, said pedestal and lower end section being provided with means permitting relative movement between them corresponding to such changing distance.
Claim 26
Dependent Claim
125 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, the wheels of the standard being turnable to dispose their axles approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; and a ''''fifth wheel'''' type of fitting on the lower end of the main section adapted to be lowered onto the ''''fifth wheel'''' of a tractor truck.
Claim 27
Dependent Claim
125 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting, raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, the wheels of the standard being turnable to dispose their axles approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; and a ''''fifth wheel'''' type of fitting on the lower end of the main section adapted to be lowered onto the ''''fifth wheel'''' of a tractor truck.
Claim 28
Dependent Claim
128 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axes approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; the standard carrying at each side two wheels, tandemly disposed, mounted at opposite ends of an equalization beam pivoted midway between them.
Claim 29
Dependent Claim
128 words
A telescopic portable conveyor including a main section, upper and lower end sections extending from both ends and retractable to lie substantially within the main section, a wheel-equipped telescopic standard for supporting raising and lowering, and moving the main section, and disposed with respect to it to provide a small preponderance of the weight on the side toward the lower end section, a swivel support for the lower end section, the wheels of the standard being turnable to dispose their axes approximately to intersect the axis of the pedestal for radial swinging of the conveyor, and turnable to transverse disposition of the axes for road movement; the standard carrying at each side two wheels, tandemly disposed, mounted at opposite ends of an equalization beam pivoted midway between them.
Claim 30
Dependent Claim
18 words
A telescopic portable conveyor of claim 17 in which said equalization beams are carried telescopically by the axle.
Claim 31
Dependent Claim
27 words
A telescopic portable conveyor of cLaim 17 in which said equalization beams are carried telescopically by the axle, and the axle includes hydraulic means for its extension.
Claim 32
Dependent Claim
115 words
A portable conveyor of the class of over 80 feet including a main section and two end sections telescopic into the main section and when extended providing a longitudinally flat roller way for a belt, a standard rigidly secured to an intermediate portion of the main section, doubly telescopic vertically, a pair of tandem wheels on each side of the standard supported by an equalizer beam pivoted for equalization and swingable between road-travel position and radial swing position; the two equalizer beams being movable apart laterally from road-travel separation to provide a support width during use of the conveyor augmented both by the moving apart and by approximately half the length of the equalizer beam.
Claim 33
Dependent Claim
115 words
A portable conveyor of the class of over 80 feet including a main section and two end sections telescopic into the main section and when extended providing a longitudinally flat roller way for a belt, a standard rigidly secured to an intermediate portion of the main section, doubly telescopic vertically, a pair of tandem wheels on each side of the standard supported by an equalizer beam pivoted for equalization and swingable between road-travel position and radial swing position; the two equalizer beams being movable apart laterally from road-travel separation to provide a support width during use of the conveyor augmented both by the moving apart and by approximately half the length of the equalizer beam.
References Cited (Backward Citations)
US3225879A
Cited
US3444987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |