SCALPELLO A RULLI.
申请公布号:IT8120230(D0)
申请号:IT19810020230
申请日期:1981.03.09
申请公布日期:1981.03.09
发明人:ARMIN OLSCHWSKI;MANFRED BRANDENSTEIN;LOTHAR WALTER
分类号:E21B10/20;E21B10/22;F16C19/54
主分类号:E21B10/20
摘要:In a rotary drill bit assembly, comprising a drill bit body, at least one trunnion and a rotary cutter rotatably supported on the rotary cutter by bearing means including at least one inner roller bearing, the rollers of the inner roller bearings running in a deep radial bearing race groove in the trunnion and a deep radial bearing race groove formed in the bore of the rotary cutter and a filling opening extending generally axially in the trunnion between the inner bearing race grooves, characterized in that the outer bearing facing the drill bit body comprises a tapered roller bearing including a plurality of tapered rollers and wherein the filling opening for the rolling elements of the inner bearing is arranged radially inside the inner bearing race of the tapered rollers in the trunnion.
CONTAINER CLOSURE AND SEAL WITH PROTECTIVE LIP
COLLAPSIBLE SHIPPING CONTAINERS
APPARATUS FOR MOVING BALES OF FIBERS OR THE LIKE FROM A BALING PRESS
AUTOMATIC CONTROL TRANSLATION SYSTEM FOR MATERIAL STACKER
HEATER CORE FIXTURE FOR FACE SOLDERING
CONVEYOR BELT AND FABRIC THEREFOR
METHOD OF RECOVERING OIL USING FLOW STIMULATING SOLUTION
METHOD AND APPARATUS FOR REMOVING ABORTED CASTINGS FROM A CONTINUOUS-CASTING MACHINE
APPARATUS FOR THE SURFACE TREATMENT OF TREE TRUNKS
GIRDLE WITH LEGS OF THE SO-CALLED PANTIE TYPE
HEAT EXCHANGER FOR BLOOD DURING TRANSFUSIONS
PNEUMATIC SOUND SOURCE EMPLOYING AN ELECTROMAGNET FOR CONTROLLING ITS RELEASE VALVE