Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Rotary drill bit having filling opening for the installation of cylindrical bearings










Image Number 2 for United States Patent #6250407.

A rotary drill bit includes a rotary cutter rotatably mounted on a leg. A radial bearing arrangement and an axial bearing arrangement are provided in an interface between the cutter and the leg. The leg includes a filling opening for enabling cylindrical rolling elements of the radial bearing arrangement to be installed. The cutter includes a radial flange which radially overlaps the radial bearing arrangement to secure the cutter on the leg. The flange, which is disposed axially behind the radial bearing arrangement and axially in front of the filling opening, includes a recess for accommodating the passage of the cylindrical rolling elements. A locking element is disposed in the filling opening for preventing dislodgement of the cylindrical rolling elements. The locking element includes a lip which projects axially forwardly of the radial bearing arrangement. The lip is disposed radially inwardly of the flange and terminates axially behind the radial bearing arrangement.








 
 
  Recently Added Patents
System, method and program recording medium for supply capacity estimation
Multiplanar image displays and media formatted to provide 3D imagery without 3D glasses
Reticle for a riflescope or other projectile-weapon aiming device
Subband SNR correction in a frequency selective scheduler
System and method for reducing the risks involved in trading multiple spread trading strategies
Charged particle source with multiple selectable particle emitters
Electronic device with a screen
  Randomly Featured Patents
Power circuit with feed through protection circuit
Methods and apparatuses for photovoltaic power management
Inflatable tent
Apparatus for stabilizing a centrifuge rotor
1,3,4-thiadiazolyl ureas and processes for controlling weeds and wild grasses therewith
Long-lasting aqueous dispersions or suspensions of pressure resistant gas-filled microvesicles and methods for thereof preparation thereof
Semiconductor device manufacturing method
Method, apparatus and system for managing subscriber data
Self-propelling harvester thresher
Secure memory device for smart cards with a modem interface