发明名称 Rotating deck bushing with dust guard system
摘要 A rotary deck bushing having an outer body held in a fixed orientation within a drill deck and an inner bushing portion that is configured for rotatable positioning within the outer body portion. A floating center bushing is removable positioned within the inner bushing and can be replaced as wear occurs. A dust deflector made up of a dust canister and a live rubber face with an opening is connected to the inner bushing portion so as to rotate with the inner bushing and to seal out the bushing portion from dust and grit and thus decrease the amount of wear upon the bearings of the device.
申请公布号 US7080702(B2) 申请公布日期 2006.07.25
申请号 US20040860532 申请日期 2004.06.02
申请人 CUNNINGTON BILLY D 发明人 CUNNINGTON BILLY D.
分类号 E21B33/03;F16C21/00 主分类号 E21B33/03
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