Abstract: A device for limiting the flow rate of a liquid generally includes a tubular and rotation-symmetrical housing with an inlet opening and an outlet opening for the liquid. A substantially rotation-symmetrical first body is guided for axial displacement and urged toward the inlet opening by a spring. The first body includes a widest peripheral part located at a distance from an inner wall of the housing. An annular second body is disposed in a stationary position on the inner wall of the housing. As liquid flow increases through the device, the first body moves toward the second body while reducing a passage size of a gap defined between the first body and the second body.

Abstract: An anti-fluttering valve construction includes a valve member with integral stem received in an oversize cylindrical bore in a guide which can give rise to fluttering of the valve member when it is unseated. To avoid fluttering, the guide at one or both ends of the bore is segmented and a spring surrounds the free ends of the segments to deform them inwardly to define a conically inwardly tapering portion of the bore which makes highly localized contact with the valve stem.

Abstract: The present invention relates to a device for periodically rinsing a water cock countersunk in the ground. A drainpipe is connected between the water cock and a closing member of an extension piece. The drainpipe includes a valve body which is opened by the water pressure prevailing in the extension pipe when the water cock is initially opened. After a predetermined period of time the valve body is closed. Thus, the present invention ensures that after the water cock is opened dirt is flushed away through the drainpipe which is subsequently automatically closed after a predetermined time. After the drainpipe is closed, a valve member connected to the extension pipe can be opened and only pure water will be supplied.