Abstract: A preferred embodiment of the hose coupling includes an exterior, annular rib on the tubular inlet member to which the hose is to be connected. A resilient boot fixed to the end of the hose has a skirt that extends beyond the end of the hose and is adapted to receive and circumscribe the ribbed end of the inlet member. The skirt and ribbed end of the member are so dimensioned that in order to receive the member, the skirt must be stretched radially outwardly by the rib as the skirt is forced onto the inlet member. When the skirt is fully seated upon the inlet member, the rib becomes received within an annular groove inside the skirt and the skirt relaxes to its original dimension. A lock ring circumscribing the boot may be shifted from an unlocked position inboard of the groove to a locked position outboard of the groove, wherein the ring prevents expansion of the skirt to thereby effectively lock the rib within the retaining groove.

Abstract: Each opener of a seed planting machine may be essentially tool-free equipped with a selected one of two or more types of interchangeable singulating meters. Each type of meter is mounted on its own adapter plate to present a module that has quick-attach mounting projections arranged and configured in an identical manner to all other modules. The projections fit into mating slots on an upright member of the opener, and the upper projection of each pair is in the nature of a downturned hook that facilitates hanging the module on the opener while also retaining it against fore-and-aft displacement. A stabilizing clip at the rear of the module securely receives the lower, rear edge of the adapter plate, and an over-center toggle latch securely retains the plate within the stabilizing clip to complete the solid yet readily removable attachment of the meter to the opener. A chain drive assembly for the meter is permanently installed on the opener so as to not be removed therefrom during interchanging of the meters.