| 摘要 |
<p>PCT No. PCT/EP92/02467 Sec. 371 Date Oct. 6, 1994 Sec. 102(e) Date Oct. 6, 1994 PCT Filed Oct. 29, 1992 PCT Pub. No. WO93/10421 PCT Pub. Date May 27, 1993An air-flow meter for milking machines, comprising an enclosed housing with a connection to a line that is to be tested for flow and pressure and with an air-intake mechanism with a variable cross-section. The air-intake mechanism is an air intake with a slot-shaped cross-section. A rotating cylinder is accommodated inside the housing and operates in conjunction with the slotted intake. The cylinder has a breach that tapers out along a considerable length of its circumference. The longitudinal axis of the intake parallels the axis the cylinder rotates around, the free cross-section of the intake is only a fraction of length of the breach along the circumference of the cylinder, and any area of the breach can be aligned with the air intake by rotating the cylinder.</p> |
