US4009890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for connecting working implement to tractor
Assignee: Kubota Corp
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Filing: 1976-03-12
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Granted: 1977-03-01
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Expires: 1996-03-12
Abstract
Abstract A device for connecting a rotary tiller unit, plow or like working implement directly to a tractor by three-point link system comprises connectors each including a connecting rod and a hitch pin to be inserted into a hitch hole at the rear end of the three-point link system. The connectors are mounted fixedly on a front portion of the working implement but are slidable laterally of the implement and mountable in their reversed position, whereby the working implement is connectable to the tractor in tandem or in offset arrangement, interchangeably between the tandem and offset positions.
Inventors
- 👤 Hiroaki Kawakita
- 👤 Shigeru Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:59
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/06; B62D49/065; A; A01; A01B; A01B59/00; A01B59/06; A01B59/066; A01B63/00; A01B63/02; A01B63/023
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
A device for connecting a working implement to a tractor including a three-point link, the device comprising generally L-shaped connectors each including a base plate with a projecting connecting rod and hitch pin, said hitch pins to be inserted into respective hitch holes at the rear end of the three-point link and each projecting from the connector eccentrically of the connecting rod, the connecting rod being slidable and fixedly mountable in a connecting bore formed in a frame of the implement laterally thereof to render the working implement connectable to the tractor in either of interchangeable tandem and offset arrangements.
Claim 2
Independent Claim
100 words
A device for connecting a working implement to a tractor including a three-point link, the device comprising generally L-shaped connectors each including a base plate with a projecting connecting rod and hitch pin, said hitch pins to be inserted into respective hitch holes at the rear end of the three-point link and each projecting from the connector eccentrically of the connecting rod, the connecting rod being slidable and fixedly mountable in a connecting bore formed in a frame of the implement laterally thereof to render the working implement connectable to the tractor in either of interchangeable tandem and offset arrangements.
Claim 3
Dependent Claim
76 words
A connecting device as defined in claim 1 wherein the connecting rod of the connector has a polygonal cross section, and the connecting bore for mounting the connecting rod is defined by a tube, the connecting rod being slidable laterally of the implement by virtue of the cooperating of the connecting rod and the inside surface of the tube defining the connecting bore, the tube being provided with a fastening member for securing the connecting rod.
Claim 4
Dependent Claim
32 words
A connecting device as defined in claim 1 wherein the connector is reversible to direct the hitch pin inward and to render the connector slidable and fixedly mountable in the connecting bore.
Claim 5
Independent Claim
152 words
A device for connecting a working implement to a tractor including a three-point link, the device comprising a pair of opposite brackets projecting forward from the working implement and each having an open connecting bore extending laterally thereof, generally L-shaped connectors each including a connecting rod and a base plate having a hitch pin for pivotably supporting a lower link element of the three-point link, and gauge mounting members each including a tubular portion fittable around the connecting rod and a gauge member mounting portion integral with the tubular portion, the connecting rod being insertable into and removable from the connecting bore, the connector being reversible, the tubular portion of the gauge mounting member being fixedly mountable on the connecting rod either outside or inside the bracket selectively when the connector is mounted in position to render the working implement connectable to the tractor in either of interchangeable tandem and offset arrangements.
Claim 6
Independent Claim
152 words
A device for connecting a working implement to a tractor including a three-point link, the device comprising a pair of opposite brackets projecting forward from the working implement and each having an open connecting bore extending laterally thereof, generally L-shaped connectors each including a connecting rod and a base plate having a hitch pin for pivotably supporting a lower link element of the three-point link, and gauge mounting members each including a tubular portion fittable around the connecting rod and a gauge member mounting portion integral with the tubular portion, the connecting rod being insertable into and removable from the connecting bore, the connector being reversible, the tubular portion of the gauge mounting member being fixedly mountable on the connecting rod either outside or inside the bracket selectively when the connector is mounted in position to render the working implement connectable to the tractor in either of interchangeable tandem and offset arrangements.
Claim 7
Dependent Claim
54 words
A connecting device as defined in claim 4 wherein the connecting rod of the connector has a polygonal cross section, and the connecting bore for mounting the connecting rod is defined by a tube, the tubular portion of the gauge mounting member being in the form of a tube fittable around the connecting rod.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |