WATER WELL FILTER Russian patent published in 2001 - IPC

FIELD: construction and operation of water wells. SUBSTANCE: filter has supporting skeleton with filtering covering and muffled flexible hose installed on its external side in the form of spiral; upper end of hose is open for communicating with pressure source. Cramps made in the form of top and bottom horizontal flanges and vertical post are fastened to supporting skeleton; vertical post has holes receiving contracting nozzles made in the form of truncated cone and directing away from filter covering on one side and sockets on other side; bottom horizontal flange is fastened to skeleton and has hole in front of filter covering. Flexible flat chambers are placed in cramps and are intercommunicating by means of flexible hose with pressure source; bimetal pulser made in the form of at least four curvilinear blades spaced 90 deg. apart is installed in flat flexible chambers. EFFECT: enhanced effectiveness of flushing filtering covering and near-filter area of bed. 2 dwg