US4366760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seed drill
Assignee: Amazonen Werke H Dreyer SE and Co KG
•
Filing: 1980-07-18
•
Granted: 1983-01-04
•
Expires: 2000-07-18
Abstract
Abstract A seed drill having single-disk furrow openers 6 set at an acute angle α to the direction of travel. The total number of furrow-opener disks is divisible by four, and one half of the furrow-opener disks in each transverse row are set at the acute angle (α) relative to the direction of travel which is directed to one side, and the half are set at an angle α which is directed to the other side.
Inventors
- 👤 Heinz Dreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:53
CPC Classifications
A; A01; A01C; A01C5/00; A01C5/06; A01C7/00; A01C7/20; A01C7/201
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
210 words
In a seed drill moveable along a direction of travel and having a frame, a plurality of furrow opener disks, means rotatably mounting the furrow opener disks on the frame in two transverse rows disposed one behind the other with the disks alternating and staggered relative to each other and with each disk displaceable vertically relative to the frame and the disks of each row slanted at an acute angle to the direction of travel, the improvement wherein: the total number of disks is divisible by four; one half of the disks in each row are disposed at said acute angle towards one side and the other half of the disks in each row are disposed at said acute angle towards the other side; the rear transverse row is offset to the right with respect to the front row when viewed from the rear of the seed drill; press wheels mounted on the mounting means and disposed in back of the furrow opener disks, wherein the press wheels are disposed in two transverse rows, one behind the other, with each press wheel set at an angle to the direction of travel which is directed oppositely to the angle at which the furrow opener disk in front of it is set.
Claim 2
Dependent Claim
210 words
In a seed drill moveable along a direction of travel and having a frame, a plurality of furrow opener disks, means rotatably mounting the furrow opener disks on the frame in two transverse rows disposed one behind the other with the disks alternating and staggered relative to each other and with each disk displaceable vertically relative to the frame and the disks of each row slanted at an acute angle to the direction of travel, the improvement wherein: the total number of disks is divisible by four; one half of the disks in each row are disposed at said acute angle towards one side and the other half of the disks in each row are disposed at said acute angle towards the other side; the rear transverse row is offset to the right with respect to the front row when viewed from the rear of the seed drill; press wheels mounted on the mounting means and disposed in back of the furrow opener disks, wherein the press wheels are disposed in two transverse rows, one behind the other, with each press wheel set at an angle to the direction of travel which is directed oppositely to the angle at which the furrow opener disk in front of it is set.
Claim 3
Dependent Claim
56 words
The seed drill according to claim 1, wherein the disks of each half of each transverse row is slanted in the same direction and wherein the disks of the front transverse row slant outwardly relative to the direction of travel and the disks of the rear transverse row slant inwardly relative to the direction of travel.
Claim 4
Dependent Claim
20 words
The seed drill according to claim 1 or 2, wherein ten furrow opener disks are disposed in each transverse row.
References Cited (Backward Citations)
US245258A
Cited
US2704524A
Cited
US1046872A
Cited
US2765756A
Cited
US3097616A
Cited
US3675725A
Cited
US3705560A
Cited
US4117788A
Cited
DE2728006A1
Cited
US4275670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |