Pneumatic seed drill with flow passage constituting an element of the chassis

摘要

The seed drill consists of a bearing chassis and of a seed reservoir (18) in the form of a hopper, which has a central outflow opening (20) equipped with a metering member, sowing ploughshares (15) located on a ploughshare carrying boom (17) and a pneumatic spray assembly (27) which comprises a spray chamber attached over the outflow opening (20) of the reservoir (18) with an injector supplied by a turbine (blower), an ascending central duct (29) attached to the spray chamber and having a distributor head (30) at its top end, to which head there are connected sowing ducts (31) directed towards the sowing ploughshares (15). The turbine is located on the bearing chassis and attached via its outlet to an element of the chassis shaped into a hollow section and acting as a spray flow duct. The ascending duct (29) equipped with the spray chamber and with the injector is attached to an element of the chassis. <IMAGE>