US4066132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk harrow with beam member suspended by u-shaped springs
Assignee: Deere and Co
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Filing: 1976-02-20
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Granted: 1978-01-03
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Expires: 1996-02-20
Abstract
Abstract Disk gangs are resiliently suspended from an implement frame by retroverted flat spring members. Flat surfaces of the springs are oriented perpendicularly to the disk blade shaft to thereby permit vertical and fore-and-aft flexing of the disk gangs as obstacles are encountered and yet minimize lateral movement of the gangs to retain gang blade alignment between front and rearwardly positioned disk gangs.
Inventors
- 👤 Gary Allen Rehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:40
CPC Classifications
A; A01; A01B; A01B21/00; A01B21/08; A01B61/00; A01B61/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
190 words
In a disk harrow comprising: a mobile frame having laterally spaced apart frame members; a first beam member transversely fixed to the frame in overlying relationship thereto and having a rectangular cross section with horizontally extending upper and lower flat surfaces; a second beam member beneath and generally parallel to the first beam member, said second beam member also having a rectangular cross section with horizontally extending upper and lower flat surfaces; a pair of spaced apart support arms attached to the second beam member and depending therefrom; a plurality of blades mounted on a common shaft carried by the support arms; spaced apart U-shaped spring members disposed between the laterally spaced apart frame members, the base section of each spring member extending forwardly from the beam members and generally vertically therebetween, with the leg section of each spring member extending rearwardly from the base section and having flat upper and lower portions, each flat portion disposed adjacent a horizontal surface of a respective beam member; and clamp means bearing against the opposite horizontal surfaces of each beam member for securing the respective flat section of the spring member thereto.
Claim 2
Dependent Claim
190 words
In a disk harrow comprising: a mobile frame having laterally spaced apart frame members; a first beam member transversely fixed to the frame in overlying relationship thereto and having a rectangular cross section with horizontally extending upper and lower flat surfaces; a second beam member beneath and generally parallel to the first beam member, said second beam member also having a rectangular cross section with horizontally extending upper and lower flat surfaces; a pair of spaced apart support arms attached to the second beam member and depending therefrom; a plurality of blades mounted on a common shaft carried by the support arms; spaced apart U-shaped spring members disposed between the laterally spaced apart frame members, the base section of each spring member extending forwardly from the beam members and generally vertically therebetween, with the leg section of each spring member extending rearwardly from the base section and having flat upper and lower portions, each flat portion disposed adjacent a horizontal surface of a respective beam member; and clamp means bearing against the opposite horizontal surfaces of each beam member for securing the respective flat section of the spring member thereto.
Claim 3
Dependent Claim
49 words
The invention defined in claim 1 wherein the clamp means are further characterized as having upper and lower horizontal plate members secured together, one plate member adjacent a horizontal flat portion of a respective spring member and the other plate adjacent a respective surface of a respective beam member.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |