| 摘要 |
<p>1,130,133. Controlling fluid flow in fertilizer distributers, DECATUR FOUNDRY & MACHINE CO. Inc. 20 Dec., ,1965 [30 Dec., 1964], No. 53810/65. Heading A1D. Anhydrous ammonia is injected directly into the soil by knives 201 (Fig. 3 not shown) fed from a tank 197 via a flow control device 30 which operates to deposit a predetermined amount of the liquid anhydrous ammonia on to a unit of ground regardless of the pressure in the tank and of the speed of travel of the knives. The liquid is fed into the flow control device 30 through the fitting 181 from whence it passes over diaphragm 75 to a metering pin 167. From this pin the liquid passes through passageway 186 to the other side of the diaphragm and into bore 90 with exit passage 94 which feeds a distributer supplying the knives. The metering pin is adjustable and is calibrated. The amount of liquid passing through the device is controlled by a valve 80 fixed to the diaphragm but movable to restrict the opening to the bore 90 and exit 94. This valve is moved by the action of a centrifugal governor 34 which is driven from a ground wheel of a carriage via a pulley 54. The valve 80 can be closed by manual movement of a spring-biased, ratchet-operated, cam member 118 to depress the stem 110 of the diaphragm. To compensate for loss of pressure area on the diaphragm because of the valve 80 there is a piston 100, on the opposite side of the diaphragm, moving in a bore 103 in communication with the bore 90.</p> |
