Seed drilling implement
First Claim
1. A seed drilling implement which comprises:
- a frame;
a drilling element mounted on the frame at or near a rear end of the frame;
a coulter mounted on the frame forwardly of the drilling element and operable to carry out preliminary opening of the ground prior to engagement of the opened ground by the drilling element;
a forward packer element mounted on the frame forwardly of the coulter and arranged at least partly to support the frame so as to control an operating depth of the coulter and the drilling element;
a rearward packer element mounted rearwardly of the drilling element, and arranged to exert a soil-packing operation over each seeded row formed by the drilling element, the drilling element and rearward packer element being mounted on a common mounting bracket, which is pivotally mounted at a trailing end of a swing arm; and
a bell crank lever and a spring, each mounted on the frame, and coupled with the mounting bracket, and operative to control a position taken up by the drilling element so that the drilling element can follow a varying ground profile.
1 Assignment
0 Petitions
Accused Products
Abstract
There is disclosed a seed drilling implement (10) which comprises a frame (11), a coupling device (12) at the forward end of the frame (11), drilling elements (13) mounted on the frame (11) at or near the rear end of the frame, coulters (14) mounted on the frame (11) forwardly of the respective drilling elements (13), forward packer elements (15) mounted on the frame (11) forwardly of the coulters (14) and arranged at least partly to support the frame (11) in order to control the operating depths of the coulters (14) and the drilling elements (13), and an associated rear packer element (16) mounted rearwardly of the respective drilling element (13), and arranged to exert a soil-packing operation over each seeded row formed by the drilling element.
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Citations
21 Claims
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1. A seed drilling implement which comprises:
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a frame; a drilling element mounted on the frame at or near a rear end of the frame; a coulter mounted on the frame forwardly of the drilling element and operable to carry out preliminary opening of the ground prior to engagement of the opened ground by the drilling element; a forward packer element mounted on the frame forwardly of the coulter and arranged at least partly to support the frame so as to control an operating depth of the coulter and the drilling element; a rearward packer element mounted rearwardly of the drilling element, and arranged to exert a soil-packing operation over each seeded row formed by the drilling element, the drilling element and rearward packer element being mounted on a common mounting bracket, which is pivotally mounted at a trailing end of a swing arm; and a bell crank lever and a spring, each mounted on the frame, and coupled with the mounting bracket, and operative to control a position taken up by the drilling element so that the drilling element can follow a varying ground profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A seed drilling implement which comprises:
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a frame; a drilling element mounted on the frame at or near a rear end of the frame; a coulter mounted on the frame forwardly of the drilling element and operable to carry out preliminary opening of the ground prior to engagement of the opened ground by the drilling element; a forward packer element mounted on the frame forwardly of the coulter; a rear packer element associated with the drilling element; a mounting bracket on which the rear packer element is mounted, and which is coupled with a rear end of a swing arm, the rear packer element being engageable with the ground to follow its surface, and to cause upward and downward adjustment of the swing arm as a consequence of ground undulations; a pivot carried by said mounting bracket, and on which is pivotally mounted a tine carrying a share at a lower ground engaging end of the tine; a resilient biasing arrangement operative to apply a restoring moment to the tine so as to provide resilient biasing to the tine in opposition to drag forces applied by the ground to the tine and the share; and means permitting limited pivoting movement of the tine against the biasing arrangement when the drag force exceeds a predetermined limit. - View Dependent Claims (12, 13, 14, 15)
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16. A seed drilling implement which comprises:
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a frame; a drilling element mounted on the frame at or near a rear end of the frame; a coulter mounted on the frame forwardly of the drilling element and operable to carry out preliminary opening of the ground prior to engagement of the opened ground by the drilling element; a forward packer element mounted on the frame forwardly of the coulter and arranged at least partly to support the frame so as to control an operating depth of the coulter and the drilling element; a rearward packer element mounted rearwardly of the drilling element, and arranged to exert a soil-packing operation over each seeded row formed by the drilling element; and a first resilient arrangement which is operative to apply a downward biasing force to the drilling element and rearward packer element, and a second resilient arrangement which is operative to apply a restoring force to the drilling element to resist soil drag forces. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification