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US3897832A Expired / Lapsed US ⏱️ 0.0 years remaining

Agricultural tool bar

Assignee: Farmhand Inc
•
Filing: 1974-08-19
•
Granted: 1975-08-05
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Expires: 1994-08-19
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Abstract

Abstract An agricultural tool bar comprising a wheeled center frame having a first wing frame pivotally connected about a horizontal axis to one end thereof and a second wing frame pivotally connected about a horizontal axis to the other end thereof. The center frame comprises a pair of longitudinally extending and spaced apart frame members having rearward and forward ends. A tongue tube is rotatably secured to the first and second frame members at the forward ends thereof and has a forwardly extending tongue secured thereto for connection to the prime mover such as a tractor or the like. An axle tube is rotatably secured to the rearward ends of the first and second frame members and has rearwardly extending wheel arms secured thereto adjacent the outer ends thereof. A transport wheel is rotatably secured to each of the wheel arms. A bell-crank means is rotatably mounted on the center frame and comprises an actuator plate having opposite ends which are pivotally connected to actuator arms extending therefrom. The outer ends of the actuator arms are operatively connected to the wing frames by means of a ''''float'''' connector so that rotation of the actuator plate will cause the wing frames to pivot relatively to the center frame. A length adjustable link arm is operatively pivotally secured at its rearward end to the actuator plate and is pivotally secured at its forward end to the tongue tube so that rotation of the actuator plate causes the tongue tube to rotate relatively to the center frame to raise or lower the forward end of the center frame. A link arm also pivotally connects the actuator plate with the axle tube so that rotation of the actuator plate causes the axle tube to rotate relative to the center frame to raise or lower the same. A hydraulic cylinder means is connected to the actuator plate for selectively rotating the actuator plate. The relationship of the tongue tube, axle tube, bell-crank apparatus and float connectors is such that the center frame means is initially raised relatively to the ground with the wing frames then being raised and pivoted upwardly to a transport position.

Inventors

  • 👤 Alton O Leedahl
  • 👤 Thomas K Wilhelm
  • 👤 John L Krizek

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 03:00
CPC Classifications
A; A01; A01B; A01B73/00; A01B73/02; A01B73/04; A01B73/044

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 192 words
An agricultural tool bar comprising, a center frame having rearward and forward portions and opposite side portions, a tongue means secured to said center frame and extending forwardly therefrom for connection to a prime mover, an axle tube rotatably mounted on said center frame, a wheel means operatively secured to said axle tube adapted to be selectively moved into and out of ground engagement upon rotation of said axle tube, first and second wing frames pivotally secured to the opposite side portions of said center frame, a bell-crank apparatus rotatably mounted on said center frame, first connection means pivotally connecting said bell-crank apparatus and said axle tube whereby rotation of said bellcrank apparatus causes said axle tube to be rotated, second and third connection means pivotally connecting said bell-crank apparatus and said wing frames whereby rotation of said bell-crank apparatus causes said wing frames to be pivoted relatively to said center frame, and a power means connected to said bell-crank apparatus so that actuation of said power means causes said center frame to be moved relatively to the ground and also causes said wing frames to pivot relatively to said center frame.
Claim 2
Dependent Claim 192 words
An agricultural tool bar comprising, a center frame having rearward and forward portions and opposite side portions, a tongue means secured to said center frame and extending forwardly therefrom for connection to a prime mover, an axle tube rotatably mounted on said center frame, a wheel means operatively secured to said axle tube adapted to be selectively moved into and out of ground engagement upon rotation of said axle tube, first and second wing frames pivotally secured to the opposite side portions of said center frame, a bell-crank apparatus rotatably mounted on said center frame, first connection means pivotally connecting said bell-crank apparatus and said axle tube whereby rotation of said bellcrank apparatus causes said axle tube to be rotated, second and third connection means pivotally connecting said bell-crank apparatus and said wing frames whereby rotation of said bell-crank apparatus causes said wing frames to be pivoted relatively to said center frame, and a power means connected to said bell-crank apparatus so that actuation of said power means causes said center frame to be moved relatively to the ground and also causes said wing frames to pivot relatively to said center frame.
Claim 3
Dependent Claim 70 words
The tool bar of claim 1 wherein a tongue tube means is rotatably mounted on said center frame at the forward portion thereof, said tongue means being rigidly secured to said tongue tube means, and fourth connection means pivotally connecting said bell-crank apparatus and said tongue tube means so that rotation of said bell-crank apparatus causes the forward portion of said center frame to be moved relatively to the ground.
Claim 4
Dependent Claim 20 words
The tool bar of claim 1 wherein each of said second and third connection means comprises a float connection means.
Claim 5
Dependent Claim 42 words
The tool bar of claim 3 wherein said float connection means comprises means for permitting a predetermined amount of pivotal movement of said wing frames relatively to said center frame so that said wing frames may follow the contour of the ground.
Claim 6
Dependent Claim 85 words
The tool bar of claim 4 wherein said float connection means comprises a tubular support means mounted on the wing frame, a support member slidably mounted in said tubular support means in a direction transverse to the direction of travel, said support member having an outer end adapted to engage said tubular support means to limit the inward slidable movement of said support member in said support means, one of said second and third connection means pivotally connecting said bell-crank apparatus and said support member.
Claim 7
Dependent Claim 32 words
The tool bar of claim 5 wherein a float adjustment means is secured to and extends betweEn said support member and support means for selectively adjusting said predetermined amount of pivotal movement.
Claim 8
Dependent Claim 52 words
The tool bar of claim 1 wherein said bell-crank apparatus comprises an elongated actuator plate means rotatably mounted on said inner frame about a vertical axis and having first and second ends, said second and third connection means being secured to said first and second ends of said actuator plate means respectively.
Claim 9
Dependent Claim 34 words
The tool bar of claim 7 wherein said power means is movably secured to and extends between said center frame and said actuator plate means between the axis of rotation and one end thereof.
Claim 10
Dependent Claim 77 words
The tool bar of claim 8 wherein a second plate means is mounted on said actuator plate means and spaced with respect thereto, said second plate means having first and second ends, said second plate means being positioned a greater distance from the axis of rotation of said actuator plate means than is said second end of said second plate means, said first connecting means being pivotally connected to said first end of said second plate means.
Claim 11
Dependent Claim 76 words
The tool bar of claim 8 wherein a tongue tube means is rotatably mounted on said center frame at the forward end thereof, said tongue means being rigidly secured to said tongue tube means, and fourth connection means pivotally connecting said second end of said second plate means and said tongue tube means so that rotation of said actuator plate means causes the forward end of said center frame to be moved relatively to the ground.
Claim 12
Dependent Claim 16 words
The tool bar of claim 8 wherein said fourth connection means comprises a length adjustable arm.

References Cited (Backward Citations)

US3414064A Cited
US3460631A Cited
US3628613A Cited
US3669195A Cited
US3700040A Cited
US3637027A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-08-04 1979-02-03 1979-08-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-08-04 1983-02-03 1983-08-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-08-04 1987-02-03 1987-08-05 $7700.00 Window Closed / Lapsed

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