Air seeder press wheel and closing wheel force control

Abstract

Air seeders that have force actuators acting on the firming implement and/or the closing wheel to adjust the downforce. In one example, the seeding implement includes a support arm having first and second portions. A finning implement support arm is pivotally connected to the support arm second portion at a first pivot at a first end of the finning implement support arm. A firming implement force actuator is pivotally connected to the support arm second portion at a first end of the firming implement force actuator and connected to the firming implement support arm at the second end of the firming implement force actuator.

1 . A row unit of a seeder comprising:
 a frame configured to be coupled to a toolbar of the seeder;   a single opener disc rotatably coupled to the frame; and   a closing system, comprising:
 a closing disc arm pivotally coupled to the frame; 
 at least one closing disc rotatably coupled to the closing disc arm, wherein the closing disc arm positions a rotational axis of the at least one closing disc rearward of a rotational axis of the single opener disc relative to a direction of travel of the row unit; 
 a packer wheel arm pivotally coupled to the frame, wherein the packer wheel arm and the closing disc arm are configured to rotate independently of one another relative to the frame; and 
 a packer wheel rotatably coupled to the packer wheel arm, wherein the packer wheel arm positions a rotational axis of the packer wheel rearward of the rotational axis of the at least one closing disc relative to the direction of travel of the row unit; 
   wherein an agricultural product storage compartment is not non-movably coupled to the frame.   
     
     
         2 . The row unit of  claim 1 , wherein the at least one closing disc comprises a single closing disc. 
     
     
         3 . The row unit of  claim 1 , wherein the at least one closing disc comprises a pair of closing discs. 
     
     
         4 . The row unit of  claim 1 , wherein the closing system comprises a closing disc biasing element coupled to the closing disc arm and configured to urge the at least one closing disc toward soil. 
     
     
         5 . The row unit of  claim 4 , wherein the closing system comprises a closing disc adjustment assembly configured to control a contact force between the at least one closing disc and the soil. 
     
     
         6 . The row unit of  claim 1 , wherein the closing system comprises a packer wheel biasing element coupled to the packer wheel arm and configured to urge the packer wheel toward soil. 
     
     
         7 . The row unit of  claim 6 , wherein the closing system comprises a packer wheel adjustment assembly configured to control a contact force between the packer wheel and the soil. 
     
     
         8 . A row unit of a seeder comprising:
 a frame configured to be coupled to a toolbar of the seeder;   a single opener disc rotatably coupled to the frame; and   a closing system, comprising:
 a closing disc arm pivotally coupled to the frame at a first pivot joint; 
 at least one closing disc rotatably coupled to the closing disc arm, wherein the closing disc arm positions a rotational axis of the at least one closing disc rearward of a rotational axis of the single opener disc relative to a direction of travel of the row unit; 
 a packer wheel arm pivotally coupled to the frame at a second pivot joint, wherein the first pivot joint and the second pivot joint are separated from one another on the frame; and 
 a packer wheel rotatably coupled to the packer wheel arm, wherein the packer wheel arm positions a rotational axis of the packer wheel rearward of the rotational axis of the at least one closing disc relative to the direction of travel of the row unit; 
   wherein an agricultural product storage compartment is not non-movably coupled to the frame.   
     
     
         9 . The row unit of  claim 8 , wherein a metering device is not non-movably coupled to the frame. 
     
     
         10 . The row unit of  claim 8 , wherein the at least one closing disc comprises a single closing disc. 
     
     
         11 . The row unit of  claim 8 , wherein the at least one closing disc comprises a pair of closing discs. 
     
     
         12 . The row unit of  claim 8 , wherein the closing system comprises a closing disc biasing element coupled to the closing disc arm and configured to urge the at least one closing disc toward soil. 
     
     
         13 . The row unit of  claim 8 , wherein the closing system comprises a packer wheel biasing element coupled to the packer wheel arm and configured to urge the packer wheel toward soil. 
     
     
         14 . A row unit of a seeder comprising:
 a frame configured to be coupled to a toolbar of the seeder;   a single opener disc rotatably coupled to the frame; and   a closing system, comprising:
 a closing disc arm pivotally coupled to the frame; 
 at least one closing disc rotatably coupled to the closing disc arm, wherein the closing disc arm positions a rotational axis of the at least one closing disc rearward of a rotational axis of the single opener disc relative to a direction of travel of the row unit; 
 a closing disc biasing element coupled to the closing disc arm and configured to urge the at least one closing disc toward soil; 
 a packer wheel arm pivotally coupled to the frame, wherein the packer wheel arm and the closing disc arm are configured to rotate independently of one another relative to the frame; 
 a packer wheel rotatably coupled to the packer wheel arm, wherein the packer wheel arm positions a rotational axis of the packer wheel rearward of the rotational axis of the at least one closing disc relative to the direction of travel of the row unit; and 
 a packer wheel biasing element coupled to the packer wheel arm and configured to urge the packer wheel toward soil; 
   wherein an agricultural product storage compartment is not non-movably coupled to the frame.   
     
     
         15 . The row unit of  claim 14 , wherein the closing system comprises a closing disc adjustment assembly configured to control a contact force between the at least one closing disc and the soil. 
     
     
         16 . The row unit of  claim 14 , wherein the closing system comprises a packer wheel adjustment assembly configured to control a contact force between the packer wheel and the soil. 
     
     
         17 . The row unit of  claim 14 , wherein a metering device is not non-movably coupled to the frame.