Agricultural apparatus

Claim 2

A seed drill comprising a frame mounted upon ground wheels, said frame having mounted thereon a seed hopper to which conduit means for conveying seed from the hopper to the ground is attached, said frame also supporting a plurality of drag bars bearing soilworking members, said drag bars being pivotally mounted on said frame, a conically shaped rubber spring having an apex and a base, said base of said rubber spring being fixed on said frame with said apex of said rubber spring being disposed to transmit a portion of the weight of said frame to a said drag bar, a said rubber spring being provided on said frame for each of said drag bars, the remainder of the weight of said frame being born by said ground wheels and frame-mounted means for moving said ground wheels vertically with respect to said frame for varying the portion of the weight of said frame born by said drag bars and thereby controlling the depth to which said soilworking members are urged into said soil, said frame-mounted moving means comprising at least a first member to one end of which at least one of said ground wheels is mounted, the other end of said first member being pivotally mounted at its other end to said frame, a lug member also pivotally mounted to said frame and connected to said first member by connecting means and a hydraulic cylinder mounted to said frame and having a piston attached to said lug member for rotating said lug member and therefore said first member

Claim 3

The seed drill recited in claim 1 wherein said connecting means is adjustable.

Claim 4

A seed drill comprising a frame mounted upon ground wheels, said frame hAving mounted thereon a seed hopper to which conduit means for conveying seed from the hopper to the ground is attached, said frame also supporting a plurality of drag bars bearing soil-working members, said drag bars being pivotally mounted on said frame, rubber spring means fixed on said frame for transmitting a portion of the weight of said frame to said drag bars, the remainder of the weight of said frame being born by said ground wheels and frame-mounted means for moving said ground wheels vertically with respect to said frame for varying the portion of the weight of said frame born by said drag bars and thereby controlling the depth to which said soil working members are urged into said soil, said moving means including at least a first member at one end of which at least one of said ground wheels is mounted, the other end of said member being pivotally mounted to said frame, a lug member also pivotally mounted to said frame and connected to said first member by connecting means and a hydraulic cylinder mounted to said frame and having a piston attached to said lug member for rotating said lug member and therefore said first member, said connecting means being adjustable and including a link member having a plurality of apertures, a bracket secured to said first member having an aperture and a fastening member adapted to fit through said aperture in said link member and said bracket to connect said link member to said bracket.

Claim 5

A seed drill comprising a frame mounted upon ground wheels, said frame hAving mounted thereon a seed hopper to which conduit means for conveying seed from the hopper to the ground is attached, said frame also supporting a plurality of drag bars bearing soil-working members, said drag bars being pivotally mounted on said frame, rubber spring means fixed on said frame for transmitting a portion of the weight of said frame to said drag bars, the remainder of the weight of said frame being born by said ground wheels and frame-mounted means for moving said ground wheels vertically with respect to said frame for varying the portion of the weight of said frame born by said drag bars and thereby controlling the depth to which said soil working members are urged into said soil, said moving means including at least a first member at one end of which at least one of said ground wheels is mounted, the other end of said member being pivotally mounted to said frame, a lug member also pivotally mounted to said frame and connected to said first member by connecting means and a hydraulic cylinder mounted to said frame and having a piston attached to said lug member for rotating said lug member and therefore said first member, said connecting means being adjustable and including a link member having a plurality of apertures, a bracket secured to said first member having an aperture and a fastening member adapted to fit through said aperture in said link member and said bracket to connect said link member to said bracket.

Claim 6

A seed drill comprising a frame mounted upon ground wheels, said frame having mounted thereon a seed hopper to which conduit means for conveying seed from the hopper to the ground is attached, said frame also supporting a plurality of drag bars bearing soilworking members, said drag bars being pivotally mounted on said frame, a conically shaped rubber spring having an apex and a base positioned between the frame and a drag bar with the base in contact with the frame and the apex in contact with the bar so as to transmit a portion of the weight of said frame to said drag bar, a said rubber spring being provided on said frame for each of said drag bars, the remainder of the weight of said frame being born by said ground wheels and frame-mounted means for moving said ground wheels vertically with respect to said frame for varying the portion of the weight of said frame born by said drag bars and thereby controlling the depth to which said soilworking members are urged into said soil, said frame-mounted moving means comprising at least a first member to which at least one of said ground wheels is connected, said first member being pivotally mounted to said frame, and further means also pivotally mounted on said frame and connected to said first member and hydraulically operated means mounted on said frame and operatively associated with said further means for rotating said further means and therefore said first member.

Claim 7

A seed drill comprising a frame mounted upon ground wheels, said frame having mounted thereon a seed hopper to which conduit means for conveying seed from the hopper to the ground is attached, said frame also supporting a plurality of drag bars bearing soilworking members, said drag bars being pivotally mounted on said frame, a conically shaped rubber spring having an apex and a base positioned between the frame and a drag bar with the base in contact with the frame and the apex in contact with the bar so as to transmit a portion of the weight of said frame to said drag bar, a said rubber spring being provided on said frame for each of said drag bars, the remainder of the weight of said frame being born by said ground wheels and frame-mounted means for moving said ground wheels vertically with respect to said frame for varying the portion of the weight of said frame born by said drag bars and thereby controlling the depth to which said soilworking members are urged into said soil, said frame-mounted moving means comprising at least a first member to which at least one of said ground wheels is connected, said first member being pivotally mounted to said frame, and further means also pivotally mounted on said frame and connected to said first member and hydraulically operated means mounted on said frame and operatively associated with said further means for rotating said further means and therefore said first member.