US3667291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tractor pull load measuring device
Assignee: Individual
•
Filing: 1970-11-16
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Granted: 1972-06-06
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Expires: 1990-11-16
Abstract
Abstract A device having an elongated frame supported at its rear end by ground engaging wheels and having a slid below the frame pivotally connected thereto forwardly of the wheels. The skid is adapted to engage the ground along its length during use or be raised above the ground for transport by a tongue being connected to the skid and the frame being pivoted upwardly about an axis through the wheels thereby lifting the rear of the skid. A ballast trolley is moveable from over the wheels on the frame to the front end as the wheels turn thereby increasing the drag due to the load being transferred to the skid engaging the ground. Measuring indicia along the frame is provided to indicate the pulling ability of the vehicle being tested in terms of how far the ballast trolley is moved forwardly.
Inventors
- 👤 Leonard R Peak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:57
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/13
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
135 words
A tractor pull load measuring device comprising, an elongated frame having front and rear ends and having ground engaging wheels at the rear end thereof, an elongated skid extending longitudinally under said frame and being pivotally connected to said frame forwardly of said wheels, and having a ground engaging front end, stop means for limiting relative vertical pivotal movement of said frame and skid towards each other at the front end thereof, coupling means for connecting said skid to the drawbar of a tractor, a ballast trolley moveable longitudinally on said frame, and drive means for operatively connecting said wheels to said ballast trolley whereby as said wheels are rotated forwardly said ballast trolley is moved forwardly thereby shifting weight on said trolley from said wheels to the front ground engaging end of said skid.
Claim 2
Dependent Claim
135 words
A tractor pull load measuring device comprising, an elongated frame having front and rear ends and having ground engaging wheels at the rear end thereof, an elongated skid extending longitudinally under said frame and being pivotally connected to said frame forwardly of said wheels, and having a ground engaging front end, stop means for limiting relative vertical pivotal movement of said frame and skid towards each other at the front end thereof, coupling means for connecting said skid to the drawbar of a tractor, a ballast trolley moveable longitudinally on said frame, and drive means for operatively connecting said wheels to said ballast trolley whereby as said wheels are rotated forwardly said ballast trolley is moved forwardly thereby shifting weight on said trolley from said wheels to the front ground engaging end of said skid.
Claim 3
Dependent Claim
36 words
The structure of claim 1 wherein said drive means includes a continuous link sprocket chain extending between the front and rear ends of said frame and a pin means on said trolley releaseably engages said chain.
Claim 4
Dependent Claim
36 words
The structure of claim 2 wherein a pin ejection means is associated with said chain and is adapted to disengage said pin from said chain upon said chain moving a predetermined distance towards said front end.
Claim 5
Dependent Claim
52 words
The structure of claim 3 wherein said pin ejection means is further defined as a sprocket at the front end of said frame in engagement with said chain and the teeth on said sprocket being adapted to eject upwardly said pin from engagement from said chain to limit movement of said trolley.
Claim 6
Dependent Claim
25 words
The structure of claim 4 wherein a guide channel supports the top half of said chain between the front and rear ends of said frame.
Claim 7
Dependent Claim
42 words
The structure of claim 1 wherein one of said wheels is rotatably mounted on a shaft and a member secured on said shaft is adapted to be detachably connected to said one wheel and said shaft is operatively connected to said chain.
Claim 8
Dependent Claim
45 words
The structure of claim 1 wherein said frame and said skid are adapted to be pivoted towards each other at said rear end upon external forces being applied, and lock means being provided for holding said frame and skid in said pivoted position for transporting.
Claim 9
Dependent Claim
36 words
The structure of claim 1 wherein said coupling means includes a detachable tongue for rigid engagement with the front end of said skid for transporting said device upon said tongue being connected to a pulling vehicle.
Claim 10
Dependent Claim
70 words
The structure of claim 1 wherein said coupling means includes a tongue means provided for connecting said skid to a vehicle and lifting said skid off of the ground at the front end thereof, and means for holding said frame in an upwardly pivoted position above said skid at tHe front end thereby raising the rear end of said skid off the ground for transporting said device on said wheels.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |