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US3682252A Expired / Lapsed US ⏱️ 0.0 years remaining

Harrow attachment and mud cleaner for grain drills

Assignee: Individual
•
Filing: 1970-06-01
•
Granted: 1972-08-08
•
Expires: 1990-06-01
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Abstract

Abstract The invention comprises a harrow attachment for grain drills, having a pole extending horizontally across the rearward end of the grain drill and attached thereto. A pair of arm are pivotally mounted to the pole and a dual pair of levers are pivotally mounted to the arms with harrow teeth mounted to the lower end of the lever arms. The arms may be pivoted upwardly about the axis of the pole against the back of the grain drill with gravity causing the levers to pivot downward with the harrow teeth attached thereto to pivot the harrow teeth compactly against the grain drill.

Inventors

  • 👤 Robert B Gates

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 17:06
CPC Classifications
A; A01; A01B; A01B19/00; A01B19/10; A01B49/00; A01B49/04

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 231 words
A harrow and mud cleaner for mounting behind a grain drill having a plurality of spaced rotatably leveling wheels rotatably mounted to a horizontal shaft, said harrow and mud cleaner comprising a pole adapted to be attached across the rearward end of the grain drill, a pair of arms pivotally mounted to the pole, a pair of levers for each arm with the upper ends of the levers pivotally mounted to the arms, sleeves fixed to the lower ends of the levers, a pair of harrow teeth support poles mounted in the sleeves, a plurality of harrow teeth mounted to the support poles, said arms being pivotally mounted to pivot upward and forward against the rear of the grain drill, with the upward movement of the arms causing the levers to pivot downward to place the harrow teeth out of the way when not in use, a plurality of V-shaped channel members forming mud cleaners, said V-shaped channel members extending forward and downward in length between the leveling wheels with their rearward ends attached to said pole and with their forward ends abutting the underside of the horizontal shaft, and with the apex of the V-shaped mud cleaners extending downward, whereby as the leveling wheels rotate relative to the mud cleaners, the mud cleaners will engage any mud lodged between the leveling wheels to remove the mud between the leveling wheels.
Claim 2
Dependent Claim 231 words
A harrow and mud cleaner for mounting behind a grain drill having a plurality of spaced rotatably leveling wheels rotatably mounted to a horizontal shaft, said harrow and mud cleaner comprising a pole adapted to be attached across the rearward end of the grain drill, a pair of arms pivotally mounted to the pole, a pair of levers for each arm with the upper ends of the levers pivotally mounted to the arms, sleeves fixed to the lower ends of the levers, a pair of harrow teeth support poles mounted in the sleeves, a plurality of harrow teeth mounted to the support poles, said arms being pivotally mounted to pivot upward and forward against the rear of the grain drill, with the upward movement of the arms causing the levers to pivot downward to place the harrow teeth out of the way when not in use, a plurality of V-shaped channel members forming mud cleaners, said V-shaped channel members extending forward and downward in length between the leveling wheels with their rearward ends attached to said pole and with their forward ends abutting the underside of the horizontal shaft, and with the apex of the V-shaped mud cleaners extending downward, whereby as the leveling wheels rotate relative to the mud cleaners, the mud cleaners will engage any mud lodged between the leveling wheels to remove the mud between the leveling wheels.

References Cited (Backward Citations)

BE527684A Cited
US550661A Cited
US2736252A Cited
US906692A Cited
US2994388A Cited
US3532171A Cited
US3500936A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-08-08 1976-02-07 1976-08-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-08-08 1980-02-07 1980-08-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-08-08 1984-02-07 1984-08-08 $7700.00 Window Closed / Lapsed

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