Patent US3860252A successfully refreshed from Google Patents.
US3860252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low center of gravity trailer
Assignee: Individual
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Filing: 1973-07-26
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Granted: 1975-01-14
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Expires: 1993-07-26
Abstract
Abstract A low center of gravity trailer for carrying extremely heavy loads over rough ground without the danger of tipping. An underslung frame is supported on a transverse beam carrying rear wheels on the outer ends thereof. The frame is upwardly offset at the forward portion thereof and is supported by a pair of steerable front wheels which are mounted on an axle which can pivot about a horizontal longitudinal pivot to permit the front wheels to adjust to the ground conditions without twisting the frame. The trailer is especially adapted for hauling liquid and gaseous fertilizer in elongate horizontal tanks.
Inventors
- 👤 Gust H Martens
- 👤 Phillip E Runyan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:54
CPC Classifications
B; B62; B62D; B62D63/00; B62D63/06; B62D63/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
323 words
In a low center of gravity trailer for carrying heavy loads over rough surfaces, a generally horizontal elongate frame including a pair of spaced parallel frame members, transverse members and X bracing securing said frame members together, a transverse eyebeam supporting the rear end of said frame and extending transversely thereacross, a pair of brace members having their rear ends secured to the outer ends of the eyebeam and having their forward ends respectively secured to the frame members of the frame, said brace members preventing the eyebeam from flexing during use, stub axles secured to the ends of the eyebeam and having rear wheels journalled thereon, an upwardly and forwardly offset sloping extension on the forward end of said frame and said extension having a horizontal front extension secured thereto and said front extension including a horizontal plate member rigidly secured thereto, a cylinder secured to said plate member in depending relation thereto, a brace web extending angularly between the cylinder and said plate member, a horizontal plate element secured to the lower end of the cylinder, a sleeve secured between the plate member aNd the plate element concentrically with the cylinder, a plate piece supporting the plate element and adapted to rotate with respect thereto, a pair of ears rigidly secured to said plate piece in spaced parallel relation and depending therefrom, a generally rectangular bolster positioned between the ears, a longitudinally extending generally horizontal pivot pin extending through the ears and the bolster to pivotally secure the bolster to the ears, a vertical pivot pin extending downwardly through the plate member, through the sleeve and to the plate element and plate piece so that the bolster may swing about a vertical axis, a retainer pin extending through the sleeve to secure the lastnamed pivot pin in position, a transverse axle extending through the bolster and out each side thereof, and a pair of front wheels journalled on said transverse axle.
Claim 2
Dependent Claim
323 words
In a low center of gravity trailer for carrying heavy loads over rough surfaces, a generally horizontal elongate frame including a pair of spaced parallel frame members, transverse members and X bracing securing said frame members together, a transverse eyebeam supporting the rear end of said frame and extending transversely thereacross, a pair of brace members having their rear ends secured to the outer ends of the eyebeam and having their forward ends respectively secured to the frame members of the frame, said brace members preventing the eyebeam from flexing during use, stub axles secured to the ends of the eyebeam and having rear wheels journalled thereon, an upwardly and forwardly offset sloping extension on the forward end of said frame and said extension having a horizontal front extension secured thereto and said front extension including a horizontal plate member rigidly secured thereto, a cylinder secured to said plate member in depending relation thereto, a brace web extending angularly between the cylinder and said plate member, a horizontal plate element secured to the lower end of the cylinder, a sleeve secured between the plate member aNd the plate element concentrically with the cylinder, a plate piece supporting the plate element and adapted to rotate with respect thereto, a pair of ears rigidly secured to said plate piece in spaced parallel relation and depending therefrom, a generally rectangular bolster positioned between the ears, a longitudinally extending generally horizontal pivot pin extending through the ears and the bolster to pivotally secure the bolster to the ears, a vertical pivot pin extending downwardly through the plate member, through the sleeve and to the plate element and plate piece so that the bolster may swing about a vertical axis, a retainer pin extending through the sleeve to secure the lastnamed pivot pin in position, a transverse axle extending through the bolster and out each side thereof, and a pair of front wheels journalled on said transverse axle.
Claim 3
Dependent Claim
42 words
A device as claimed in claim 1 and further including a pair of ear members secured to said bolster and adapted to have a trailer tongue secured thereto, and a generally horizontal cylindrical tank mounted on the frame for carrying materials therein.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |