초록 ▼

Two racks of parallel screening bars each have rigid rack frames which extend beneath the bars. Two crankshafts with offset cam surfaces are mounted to the machine frame, and the rack frames are mounted by bearings to the crankshaft cam surfaces. The rack frame bearings are closely spaced beneath th

Two racks of parallel screening bars each have rigid rack frames which extend beneath the bars. Two crankshafts with offset cam surfaces are mounted to the machine frame, and the rack frames are mounted by bearings to the crankshaft cam surfaces. The rack frame bearings are closely spaced beneath the bars to balance the system, while the rack frames provide a stiff oscillatory platform for the bars, permitting narrow gauge bars and increased screening area. The rack frames also include counterweights to dynamically balance the system.

대표청구항 ▼

[ I claim:] [1.] A bar screen apparatus comprising:a machine frame;a first set of parallel bars which define a first rack, each bar of the first set having two depending support legs;a second set of parallel bars which define a second rack, each bar of the second set having two depending support leg

[ I claim:] [1.] A bar screen apparatus comprising:a machine frame;a first set of parallel bars which define a first rack, each bar of the first set having two depending support legs;a second set of parallel bars which define a second rack, each bar of the second set having two depending support legs, wherein the bars of the first rack are interleaved with the bars of the second rack, and wherein screening gaps are defined between adjacent interleaved bars;at least two crank shafts rotatably mounted to the machine frame and positioned under the first and second racks;two first drive beams which are mounted to the crank shafts in opposed relation;two first bar support beams which extend between and connect the two first drive beams, wherein each of the bars of the first set of parallel bars is mounted by one of said two depending support legs to each of the two first bar support beams;two second drive beams which are mounted to the crank shafts in opposed relation; andtwo second bar support beams which extend between and connect the two second drive beams, wherein each of the bars of the second set of parallel bars is mounted by one of said two depending support legs to each of the two second support beams, and wherein the first and second drive beams are driven by the crank shafts to impart oscillatory motion to the racks.